Audi TT Coupe and
Roadster 3.2 quattro with Sporty Direct Shift Gearbox DSG
Text and pictures courtesy of Audi of America
INGOLSTADT, Germany - Audi is now offering its TT Coupé and Roadster sports cars with a sporty six-cylinder engine and a highly innovative dynamic gearbox that permits an uninterrupted flow of power during gear changes. Combining this advanced sports gearbox with the high-torque 3.2-litre engine and quattro permanent all-wheel drive emphasises the Audi TT's road dynamics in a uniquely effective manner.
With its 184 kW (250 bhp) engine, the Audi TT 3.2 quattro sprints from 0 to 100 km/h in only 6.5 seconds (Roadster: 6.6 seconds) and has a top speed of 250 km/h, the point at which the governor cuts in smoothly. Overall fuel consumption according to the standard test method is 9.8 litres per 100 kilometres for the Coupé and 9.9 l/100 km for the Roadster. These figures speak for themselves, even when compared with vehicles with a classic 6-speed manual gearbox. The differences compared with the conventional multi-ratio automatic transmission with torque converter are even more impressive, since the latter is prone to significantly higher transmission losses due to its fundamental concept.
The source of the power is the 3.2-litre V6 engine, already well established, with four valves per cylinder. This six-cylinder unit is particularly well suited to the sporty Audi TT by virtue of its outstanding torque and power characteristics, especially in combination with the new twin-clutch transmission. Power output is 184 kW (250 bhp), and the high, flat torque curve has a maximum value of 320 Nm between 2800 and 3200 rpm.
The V6, with an angle of only 15 degrees between the two rows of cylinders, is an extremely compact engine. This is essential for transverse installation in the car. The valve gear generates only a small amount of friction thanks to the use of roller cam followers with hydraulic adjustment. In order to reduce emissions and further improve efficiency, the inlet and exhaust camshafts are continuously adjustable. The compression ratio is 11.3:1.
Other technical details such as the variable intake manifold and the modified intake ports give the six-cylinder engine its superior torque and power output, coupled with low emissions. A great deal of detail work has once again been invested, particularly in the cylinder head and air intake areas, in order to increase peak power output and improve the torque characteristic still further for use in the TT. The version installed in the TT Coupé and TT Roadster complies with the tough exhaust emission limits applicable in the USA and Japan, and of course also outperforms the European EU4 standard.
Throttle valve actuation is designed for an exceptionally agile, spontaneous engine response to accelerator pedal movements. The way it interacts particularly with the ultra-rapid, precise control technology of the new Direct Shift Gearbox with double clutch opens up an entirely new dimension in propulsive power. The close connection between throttle and transmission control is made particularly apparent by active throttle blips during downshifts in selector lever position S and in the manual gear-lever gate.
The sound of the dual-branch variable exhaust system suitably reflects these sporting characteristics. A flap in the exhaust system is opened or shut depending on engine speed and the acoustics influenced accordingly. The sonorous sound never becomes over-assertive, even at high engine speeds, yet it unmistakably conjures up all the sentiments that sports-minded TT drivers appreciate.
The sporty TT suspension with its firm but comfortable tuning has been refined and adapted to suit the more demanding requirements of the new engine/
transmission combination. The front suspension uses McPherson struts, whilst double wishbones with trailing arms are used at the rear.
The diameter of the anti-roll bars on the front and rear axles has been increased compared with the four-cylinder turbocharged versions. The spring/shock absorber settings have been modified to cope with the increased power and to achieve a further improvement in road performance. A special ESP/ASR and ABS application with integral brake assist function takes account of the car's even more demanding handling and braking requirements.
Safe braking is assured by the 17-inch twin-piston brake system with floating callipers and ventilated discs. The front discs are 334 millimetres, the rear discs 265 mm in diameter. Both versions of the Audi TT 3.2 quattro run on 7.5J x 17-inch wheels of six-arm "Wing" design, with 225/45 tyres. Two other 17-inch and three 18-inch wheel styles are available as optional extras.
Audi TT 3.2 quattro: dynamic through and through
The two new top models in the Audi TT series have other ways of demonstrating their dynamic character too. The front apron has been aerodynamically optimised and incorporates side gills. It has enlarged inlet openings to satisfy the increased cooling air requirements. The modified rear spoiler and a honeycomb-pattern diffuser trim are the distinguishing features at the rear. The larger rear spoiler further reduces rear-end lift, in line with the even higher performance of the TT 3.2 quattro. The Coupé's low aerodynamic drag coefficient of cD = 0.32 remains unchanged.
Audi TT 3.2 quattro and TT Roadster 3.2 quattro both have xenon headlights and titanium-coloured headlight surrounds as standard equipment.
Inside, the six-cylinder models can be distinguished from other versions of the TT by the aluminium gear lever gate and instrument cluster, which contains a speedometer reading up to 280 km/h. For an authentic motor-racing experience, there are shift paddles behind the steering wheel.
Like all versions of the TT, these new ones have an excellent safety equipment specification, with airbags and pyrotechnic-action seat belt tensioners for the driver and front passenger. Head and thorax airbags in the front seat backs protect the seat occupant's upper body and head area in the event of a side-on impact.
The standard automatic climate control makes sure that occupants feel comfortable in the Audi TT, no matter what the outside temperature may be.
The TT Roadster 3.2 quattro also has an electro-hydraulic hood as standard.