The Audi TTS, both in Coupé and Roadster body styles, combines enthralling sportiness with cultivated comfort. Its two-liter TFSI with the large turbocharger and numerous additional modifications pumps out 200 kW (272 hp) and 350 Nm (258.15 lb-ft) of torque, the latter from 2,500 to 5,000 rpm. With the optional six-speed S tronic, the Audi TTS Coupé sprints from zero to 100 km/h (62.14 mph) in 5.2 seconds and accelerates all the way to an electronically governed top speed of 250 km/h (155.34 mph). The Coupé with the S tronic consumes an average of only 7.7 liters of fuel per 100 km (30.55 US mpg).
18-inch wheels with 245/40-series tires, the Audi magnetic ride adaptive shock absorber system, the Sport button and a powerful brake system with four internally ventilated discs make the Audi TTS extremely dynamic. The body, which has been lowered 10 millimeters (0.39 in) versus the volume model, was given a series of design updates. The most striking of these are the single-frame grille with its aluminum-look horizontal double bars and the bumper.
The sheet metal body, which accounts for two-thirds of the vehicle’s height, stands confidently on the road. Large, newly styled wheels fill the wheel wells. With the Coupé, the convex and concave curves of its surfaces and the flat roofline accentuate the character of an athletic sculpture straining forward. The tornado line beneath the shoulder contour and the ascending dynamic line above the sills create the impression of a more elongated body. The legendary aluminum fuel tank flap is located above the right rear wheel.
The face of the TT now has even more character. The most striking feature at the front of the car is the powerful bumper. It frames larger air inlets with three-dimensional, sharply drawn out edges. The fog lights are set in chrome rings. Also sporting a new look is the lattice of the single-frame grille in high-gloss black.
The slightly angled headlights tapered strongly to the side give the TT an authoritarian look. The wings – wing-shaped contours inside the headlights – emphasize the three-dimensional character. The optional xenon plus headlights have been redesigned; twelve white LEDs arranged in a straight line at the lower edge of the headlights serve as the daytime running lights. Audi also offers the adaptive light system with dynamic cornering lights and the high-beam assistant, which switches between the low and high beams, as options.
The tubular, apparently floating reflectors of the tail lights add visual depth to the rear end of the TT. The voluminous tailpipes of the exhaust system – the 2.0 TFSI features a dual exhaust – and the larger, flat black diffuser set additional accents. The spoiler is discretely integrated into the contour of the trunk lid. It extends automatically at 120 km/h (74.56 mph) and retracts again below 80 km/h (49.71 mph). The driver can also activate it at any time via a switch.
Perfectly tuned: the flow of air around the vehicle
The base version of the Audi TT Coupé has a cd value of only 0.30; for the Roadster it is 0.32. Thanks to an engine shroud and the aluminum structure of the body, the underbody is nearly completely smooth, which improves the flow of air around the car. Both body styles have grown 9 millimeters (0.35 in) and now measure 4,187 millimeters (13.74 ft) in length. The width of 1,842 millimeters (6.04 ft) and the height of 1,352 millimeters (4.44 ft) and 1,357 millimeters (4.45 ft) for the Coupé and Roadster, respectively, remain unchanged. The wheelbase measures 2,468 millimeters (8.10 ft).
Four new metallic colors have been added to the TT color range: Scuba Blue, Oolong Gray, Volcano Red and Dakota Gray. The familiar colors Brilliant Black, Ibis White, Solar Orange, Ice Silver metallic, Sahara Silver metallic and Phantom Black pearl effect remain in lineup. The colors Misano Red pearl effect and Daytona Gray pearl effect are available with the S line sport package.
The S line exterior package focuses on design modifications in the area of the front bumper, the air inlets, the single-frame grille and the side sills. The splitter of the front spoiler and the honeycomb-look diffuser insert are painted platinum gray. The tailpipes of the exhaust system sport chrome-plated trims, and S line badges adorn the front fenders.
Lightweight and elegant: The TT Roadster’s top
Like every open-top Audi, the TT Roadster also has a lightweight cloth top. It fits in perfectly with the roadster idea of open-top driving and offers major practical benefits over a folding steel hard top.
With its reinforcements of lightweight steel and aluminum components, the soft top, which is available in black, dark gray and beige and integrates a large glass rear window, reduces the overall weight and the center of gravity. It fits harmoniously into the design line and takes up little space when folded – a shallow compartment between the bulkhead and the trunk lid suffices. The Z-fold means that the front section of the top lies over the fabric like a cover and is locked flush with the body.
An electrohydraulic drive for the top is available as an option for the new TT Roadster. It opens at the push of a button in 12 seconds, even when driving at speeds of up to 50 km/h (31.07 mph). Unlike the manual version, which operates with a central locking mechanism, the fully automatic top comes with an additional, black headliner. There is an acoustic mat between it and the outer skin, further improving the already good acoustic and thermal insulation.
The price list also includes a net wind deflector that can be extended and retracted electronically as an option for both versions of the top. The deflector reduces drafts and turbulence for the passengers.
The body of the TT is built at the Ingolstadt plant according to the ASF principle with an innovative combination of aluminum and steel. The abbreviation stands for Audi Space Frame, the ground-breaking aluminum technology that the brand developed in the early 1990s. Final assembly of the TT takes place at the plant in Györ, Hungary. Shipments between the plants are made using resource-efficient rail transport.
The skeleton of the TT bodies is made of extruded aluminum sections and die-castings; the aluminum sheet panels form a positive connection and perform a load-bearing role within this structure. The individual components have very different shapes and cross-sections – like the bones in a skeleton, they combine best possible function with lowest possible weight.
Audi once again sets new standards with this composite construction. The front end, the floor and the superstructure of the TT are fabricated of aluminum; the doors and the trunk lid are made of deep drawn steel. The rear section of the floor assembly, the tail panel and the bulkhead of the Roadster are made of high-strength steel. This distribution of materials provides for balanced axle load distribution and thus for dynamic handling.
Up to 90 kilograms (198.42 lb) lighter: the reversal of the weight spiral
The material mix is dominated by aluminum, which accounts for 68 percent of the Coupé’s weight and 58 percent of the Roadster’s. The closed body weighs 206 kilograms (454.15 lb), which breaks down to 140 kilograms (308.65 lb) of aluminum and 66 kilograms (145.51 lb) of steel. The two superstructures would be 45 percent or roughly 100 kilograms (220.46 lb) heavier if made entirely of steel. Depending on the model, the curb weight of the TT has been reduced by between 20 and 90 kilograms (44.09 and 198.42 lb) compared to the first generation with its steel sheet metal body – Audi has reversed the weight spiral.
Specifically, the aluminum fraction in the Coupé comprises 63 kilograms (138.89 lb) of panels, 45 kilograms (99.21 lb) of castings and 32 kilograms (70.55 lb) of extruded sections. Castings are used primarily where high forces are introduced locally and where multifunctionality is required. The A-pillar node, for example, connects the longitudinal member, the sill, the windshield crossmember and the A-pillar with highly precise geometry and perfect spatial efficiency.
The big advantage of extruded sections is their design flexibility. The side sills of the Coupé and the Roadster are identical on the outside, but are ribbed very differently on the inside. That determines their rigidity, which is even higher in the Roadster than in the Coupé. The sections used in the TT are made of advanced alloys developed by Audi for greater strength and a further reduction in weight.
The low weight of the body is a key factor for the excellent dynamics and exemplary efficiency. The TT 1.8 TFSI weighs a mere 1,240 kg (2,733.73 lb), a good 100 kilograms (220.46 lbs) less than its closest competitors. The ASF technology proves ideal for a sports car in all other criteria as well. Compared to the first-generation TT, static torsional rigidity increased by roughly 50 percent in the Coupé and 100 percent in the Roadster. This lays the foundation for precise, dynamic handling, while also being responsible for the high vibrational comfort inside the car.
The Audi TT makes no compromises when it comes to crash safety. The longitudinal members in the front end comprise extruded sections and highly durable castings at the transition to the passenger cell. In the back, large-volume members protect the passenger cell. In the event of a side-impact collision, the high-strength aluminum sections in the doors brace push back against the other car. Horizontal extruded profiles reinforce the floor of the passenger cell. A strong roof frame provides protection in the event of a rollover. The Roadster also has high-strength tubes in the windshield frame and two rollbars on board.
The dynamic styling of the exterior design is carried through into the interior of the TT. It gives the impression of a tailored suit – the cockpit is perfectly tailored to the driver, with the center console canted slightly toward him or her. The design of the short shift lever, the round air vents and the dials of the automatic climate control system (standard in the 2.0 TFSI) follow TT tradition.
The instrument cluster is housed beneath a dome that can be trimmed in leather as an option. Typical for the TT are also the speedometer and tachometer dials recessed into tubes, supplemented by a digital speed indicator in the display of the driver information system. When the ignition is switched on, the dials briefly turn all the way to the limit and then fall back to zero. The ergonomics are clear and the fit and finish is uncompromisingly precise – just like always with Audi.
The new three-spoke sports steering wheel, which is adjustable horizontally and vertically, fits snugly in the hands. Its thick rim, covered with high-grade Nappa leather, is flattened at the bottom. An optional multifunction sports steering wheel is available with convenient controls for the radio and telephone. In models with S tronic, the steering wheel also includes two shift paddles.
The driver’s and passenger’s sport seats offer a deep, sporty position, good comfort and firm lateral support. Options include a four-way lumbar support, power seats and heated seats. The Audi exclusive program from quattro GmbH offers manually adjustable bucket seats covered with black Fine Nappa leather.
A series of fine details now imparts the interior with even more gloss. New aluminum-look applications shine on the steering wheel, the center console and in the door liner. Elegant accents on the air vents, for example, are provided by rings, frames and strips in high-gloss black. The aluminum strip above the glove box door is now brushed gray.
Three new interior colors – nougat brown, titanium gray and garnet red – join the existing colors of black, chennai brown, magma red and luxor beige.
The leather seat covers are specially treated to reduce thermal heating by as much as 20 degrees Celsius (68 Fahrenheit) when the TT is parked in the sun. This treatment is available for both the Roadster and the Coupé.
Cloth seats are standard in cars with the entry-level engines. The 2.0 TFSI comes standard with a leather/Alcantara combination and heated seats. For custom specifications, Audi offers Valetta, Fine Nappa, Leather/Alcantara and Impulse leather packages. The Impulse seat covers, available in black or chennai brown, have thick, boldly offset seams. They achieved cult status in a similar form in the first-generation TT Roadster.
For individualists: elegant style ideas
A rich selection in Color & Trim awaits the true individualists among the TT buyers. It comprises three leather packages – one of which with colored accents – and an application package. With the latter, components such as the decorative inlays on the center tunnel are gray aluminum. The pedals are plated with stainless steel.
The S line sport package, on the other hand, immerses the interior in sporty black. The door sill trims bear S line badges, and the sport seats have seat covers with gray seams. The steering wheel, the shift lever – with shortened throws in the manual version – and the floor mats sport special details. Many control elements, from the pedals to the light switches to the spokes of the steering wheel, are adorned with aluminum-look trim. 18-inch alloy wheels and a body lowered by 10 millimeters (0.39 in) make the handling even more dynamic.
The interior of the TT comes standard with two door pockets and two cup holders. A storage package comprising multiple nets and storage compartments is available as an option. Sporty Roadster customers can also opt for a load-through facility in the bulkhead plus removable ski bag.
The Audi TT Coupé and the TT Roadster are sports cars with a high degree of everyday utility. The backs of both rear seats fold down in the 2+2-seater Coupé, expanding the trunk space beneath the long lid from 290 to 700 liters (10.24 – 24.72 cubic ft).
With the top closed, the Roadster offers 250 liters (8.83 cubic ft) of trunk space. These values apply equally to the models with front-wheel and quattro all-wheel drive.
Audi offers a choice of three four-cylinder engines with turbocharging and direct fuel injection for both the TT Coupé and the TT Roadster. The two TFSI gasoline engines and the TDI combine sporty performance with groundbreaking efficiency – their fuel consumption figures have been reduced by up to 14 percent. All three engines work with a recuperation system that recovers energy during braking and coasting phases and stores it temporarily in the battery.
The TFSI engines
New in the TT engine lineup is the 2.0 TFSI with 155 kW (211 hp), which replaces the 2.0 TFSI with 147 kW (200 hp) and the 3.2-liter V6. The turbocharged four-cylinder engine, in which the Audi valvelift system (AVS) varies the lift of the exhaust valves, develops 350 Nm (258.15 lb-ft) of torque. With a manual transmission, it accelerates the Coupé from zero to 100 km/h (62.14 mph) in 6.1 seconds on its way to a top speed of 245 km/h (152.24 mph). Audi offers an optional drivetrain with the six-speed S tronic and quattro permanent all-wheel drive. In this combination, the standard sprint from zero to 100 km/h (62.14 mph) takes just 5.6 seconds.
Equipped with a manual transmission, the TT 2.0 TFSI consumes only 6.6 liters of fuel per 100 km (35.64 US mpg) in the European test cycle. Its CO2 emissions are 154 g/km (247.84 g/mile). This represents an improvement of 1.1 liters/100 km, or 14 percent, over the previous engine, which an international panel of journalists had honored as “Engine of the Year” multiple times in a row since 2005.
The 2.0 TFSI is a member of the Audi 888-series of engines. These embody the philosophy of downsizing: the substitution of engine displacement with forced induction. The crankcase of the long-stroke engine, which displaces 1,984 cc, is made of cast iron, which offers good acoustic damping, yet weighs only 33 kilograms (72.75 lb).
Its rigid basic structure helps to eliminate drumming and vibrations. Two balance shafts counter-rotate in order to eliminate the second-order free mass forces.
The chain for the balance shafts has also been optimized for quiet running. A second chain drives the oil pump, which uses volumetric flow control and two-stage pressure to save roughly 0.2 liters of fuel per 100 km. A third chain drives the two camshafts. The intake camshaft can be steplessly rotated 60 degrees relative to the crankshaft, and its actuator reacts particularly spontaneously.
The gasoline direct injection technology developed by Audi harmonizes perfectly with the turbocharging, because the evaporation of the strongly swirled fuel cools the combustion chambers. This enables 9.6:1 compression – a ratio that provides for high efficiency. The injection pressure in the common rail system is 150 bar. Six-port injectors precisely distribute the fuel within the combustion chamber.
A water-cooled turbocharger is responsible for filling the cylinders. An optimized turbine wheel improves its initial response at low engine speeds. The lightweight and compact intercooler also achieves a high degree of efficiency. In the aspiration system, the charge motion flap generates turbulence to ensure the production of a high-quality, homogenous mixture.
The Audi valvelift system: lower flushing losses
The Audi valvelift system further increases power, torque and efficiency by adjusting the lift of the exhaust valves in two stages as a function of load and engine speed. This reduces flushing losses in the combustion chamber and also ensures that the optimal flow of the exhaust gas is directed to the turbocharger. The design with the so-called cam elements – sleeves on the camshaft that can be positioned electromagnetically – is compact and lightweight.
Besides the new 2.0 TFSI, the TT lineup also includes the 1.8 TFSI. It is also a member of the 888 family and displaces 1,798 cc. The four-cylinder delivers 118 kW (160 hp) and 250 Nm of torque (184.39 lb ft), the latter between 1,500 and 4,500 rpm. It launches the Coupé from a standing start to 100 km/h in 7.2 seconds, with a top speed of 226 km/h (140.43 mph). It consumes just 6.4 liters of fuel per 100 km (36.75 US mpg) on average, which is equivalent to only 149 grams of CO2/km (239.79 g/mile) and an improvement of 0.3 liters/100 km. The TT 1.8 TFSI is available with a manual transmission and front-wheel drive.
The 2.0 TDI
Smart power, superior cultivation and groundbreaking efficiency: The Audi TT and the TT Roadster are powered by a highly efficient diesel engine. The 2.0 TDI with 125 kW (170 hp) is now available in a new, intensively updated version.
In the TT Coupé, the two-liter, four-cylinder engine consumes just 5.3 liters of fuel per 100 km (44.38 US mpg), which corresponds to only 139 grams of CO2/km (223.70 g/mile). With 125 kW (170 hp) and 350 Nm (258.15 lb-ft) of torque – the latter available between 1,750 and 2,500 rpm – the standard sprint takes 7.5 seconds and acceleration doesn’t end until a top speed of 226 km/h (140.43 mph) is reached. The two-liter TDI is coupled with a manual transmission and quattro all-wheel drive.
The long-stroke diesel, which displaces 1,968 cc, shed 4 kilograms (8.82 lb) and now weighs in at 154 kilograms (339.51 lb). The greatest savings were achieved with the alloy cylinder head. The width of the belt for the two camshafts and the ancillaries was reduced, making it quieter and lower in friction. The water pump requires less drive energy, the oil pump is regulated and the crankshaft seals were optimized for easy running.
The common rail injection system generates up to 1,800 bar of system pressure. The fuel is precisely nebulized into the combustion chambers via eight-port nozzles, and the injectors can complete up to six injection operations per work cycle. Two balance shafts counteract the second-order inertial forces.
The turbocharger uses adjustable vanes for the spontaneous development of torque. The intake manifold is made of lightweight plastic.
The intake ports, the swirler flaps and the bowls in the pistons generate targeted turbulence in the inflowing air.
The reward for all of these measures is excellent thermodynamics in the combustion chambers, enabling the four-cylinder TDI to be operated with a high exhaust gas recirculation rate. A new compact cooler greatly reduces its temperature, and the cooler combustion significantly reduces raw emissions of nitrogen oxides.
Regardless of the engine chosen, the TT comes standard with a six-speed manual transmission with a precisely shifting gearbox with short throws. Thanks to its three-shaft layout, the gearbox requires little space. Its housing is made of ultra-lightweight magnesium.
Audi also offers the S tronic dual clutch transmission as an option for the new 2.0 TFSI. This transmission switches between its six gears with no perceptible interruption to the supply of power. The six-speed S tronic shifts within a few hundredths of a second extremely smoothly and very comfortably, either fully automatically or manually as the driver desires. Manual shifts can be made using the optional paddles on the steering wheel. Furthermore, there are two fully automatic modes available, N for Normal and S for Sport. The special “launch control” start program achieves optimal acceleration from a standing start.
Like all dual-clutch transmissions, the new seven-speed S tronic comprises two partial gearboxes. Their gear wheels are located adjacently on two drive shafts and are operated by two multi-plate clutches. The large K1 clutch conducts the engine torque via a solid shaft to the gear wheels for the odd gears 1, 3 and 5, as well as the reverse gear. A hollow shaft rotates around the solid shaft. It is connected to the second, smaller K2 clutch, which is located inside of its larger sibling, and which acts on the gear wheels for the gears 2, 4 and 6.
Shifts are performed by switching the clutches. When the TT is accelerating in third gear, for instance, the K2 clutch is disengaged. The electrohydraulic controller engages the gear pair for fourth gear ahead of time. As soon as the command to shift gears is given, K1 disengages while K2 engages nearly simultaneously. Every transmission speed is assigned a conventional switching unit, as a result of which it is also possible to change directly from sixth to fourth gear, for instance.
quattro permanent all-wheel drive
Another high-tech unique selling point for the TT besides the dual-clutch transmission is the quattro permanent all-wheel drive system. It is available as an option for the 2.0 TFSI with the S tronic; it comes standard with the 2.0 TDI.
The multi-plate clutch, which is electronically controlled and hydraulically actuated, is located at the end of the propshaft, in front of the rear axle differential – an installed position that benefits the axle load distribution. It normally sends the majority of the engine’s power to the front axle. The clutch’s control unit continuously analyses the driving conditions using a wide range of data. If traction decreases at one axle, it initiates a redistribution of the power.
Inside the clutch is a package of plates that is running in an oil bath and can be pressed together by hydraulic pressure. As the pressure increases, more torque flows steplessly to the rear axle – up to 100 percent in the extreme case. An electric pump and a reservoir are used to quickly build up the oil pressure, which can reach a maximum of 30 bar.
The Audi TT Coupé and the TT Roadster are true sports cars in a compact format. This also applies to their road characteristics. They respond to steering input precisely and spontaneously; they take all types of corners at high speed and with little body movement. Their handling is precise, stable and safe. The car announces the approach of its generous limit with slight understeer.
Audi uses a MacPherson construction with lower wishbones for the front suspension. The pivot bearings, the transverse links and the subframe are made of lightweight aluminum. The subframe is bolted to the body, thus imparting the forward structure with high rigidity.
The rack-and-pinion steering features electomechanical servo boost that varies as a function of vehicle speed. It combines precise, firm, direct steering feedback with minimal sensitivity to excitation from the road surface. It is also very efficient because it does not have to draw any energy while driving straight ahead. It features a sporty and direct 16.9:1 ratio.
The four-link rear suspension is used in both the quattro and front-wheel drive models. It provides ideal separation of the longitudinal and lateral force absorption points. The longitudinal links absorb the driveline and braking forces, and their relatively soft mounts provide good ride comfort.
On the other hand, the three wishbones per wheel – the spring link, the upper wishbone and the tie rod – are rigidly attached to the subframe and thus conduct lateral forces precisely into the body. All links are made of high-strength steel. Separate, compact coil springs and dampers absorb vertical forces.
The range of wheels has been thoroughly updated, and now features 14 variants. All three engine versions of the TT roll off the assembly line on 17-inch, 8.5 J x 17 aluminum wheels with size 245/45 tires as standard.
Winter wheels are available in three sizes from 16 to 18 inches; the range of optional summer wheels extends all the way up to 9 J x 19 with size 255/35 tires. The large wheels with a seven twin-spoke design with a titanium gray finish are particularly attractive.
Many of the tires feature reinforced sidewalls for emergency running. Audi offers an optional intelligent tire pressure monitoring system that identifies which wheel has suffered a puncture.
The brake system has been systematically matched to the requirements of a sports car. With all engine versions except the 2.0 TFSI, the front discs are ventilated and measure 312 mm (12.28 in) in diameter; the solid rear discs have a diameter of 286 mm (11.26 in). With the 2.0 TFSI, the discs have a diameter of 340 millimeters (13.39 in) up front and 310 millimeters (12.20 in) at the rear. The brake calipers are also available in dark gray as an option. The ESP stabilization system has been optimized for a dynamic driving style and subtle intervention.
High-tech for the shock absorbers: Audi magnetic ride
All engine versions of the TT can be ordered with the optional electronically controlled shock absorber system, Audi magnetic ride. It resolves the classic target conflict between comfort and dynamic driving by modifying the damping characteristic as needed within just a few milliseconds.
Circulating within the damper pistons is a synthetic hydrocarbon oil containing tiny magnetic particles between three and ten thousandths of a millimeter in size. When a voltage is applied by a solenoid, a magnetic field is generated in which the orientation of the particles changes. They align perpendicular to the direction of flow of the oil, thus impeding its flow through the piston channels.
Drawing information from complex sensing technology, the control unit continuously monitors road conditions and the driver’s style. The driver can press a button to select either Normal or Sport mode. The two base characteristics are now even more clearly differentiated.
In Normal mode – when the oil is more viscous – the TT rolls smoothly; this is ideal for long-distance driving or uneven road surfaces. In Sport mode, by contrast – when the oil is less viscous – it reveals a dynamic character that is manifested by a firm grip of the road surface. Steering response is enhanced, and yaw movements are rigorously suppressed. The targeted bracing of the individual wheels during fast cornering makes the self-steering behavior even more dynamic.
Another option is available in addition to Audi magnetic ride – the Sport button. The driver can use it to adjust the characteristic of the gas pedal (with manual transmissions), the servo boost for the steering and the engine sound in two stages.
A new color, Panther Black, crystal effect, is available for the exterior, with the new color combination spectral silver/black available for the interior. The instruments have gray dials. Xenon plus headlights with LED daytime running lights come as standard.
With its innovative, closed styling, the first-generation Audi TT was a visual sensation. The second generation TT Coupé and the TT Roadster have also made a name for themselves as design icons. Awards such as the 2006 Auto Bild Design Award and the 2007 “World Design Car of the Year” document this status. A brawny, broad foundation and powerful shoulders – the two compact sports cars have fascinatingly masculine lines. Their appearance is now even more expressive than ever.