Audi TT Roadster
The TT shares an identical powertrain layout as its related Volkswagen Group platform-mates. The TT uses a transversely mounted internal combustion engine, with either front-wheel drive, or 'quattro' on-demand four-wheel drive. It was first available with a 1.8 liter inline four cylinder 20-valve turbocharged engine.
The original four cylinder engine range was complemented with a 247 hp 3.2 liter VR6 engine in early 2003, which comes as standard with the quattro four-wheel drive system. In July 2003, a new six-speed dual clutch transmission - dubbed the Direct-Shift Gearbox, which improves acceleration through much-reduced shift times, was offered, along with a stiffer suspension.
Source: Wikipedia, 2011