The 2009 Audi TT is offered as both a coupe and a roadster. The roadster has a power-retracting soft convertible top, which can open in just 12 seconds and operated at road speeds up to 25 mph. Two engines are offered on the TT. A turbocharged 200-hp, 2.0L direct-injection 4-cylinder engine is standard on the 2.0T model, while 3.2 models get the 250-horsepower, 3.2L V6. 2.0T models are available in either front-wheel drive or with Audi's quattro all-wheel-drive system, while 3.2 models come only in quattro configuration. With the 4-cylinder engine, the quick S-tronic dual-clutch gearbox is standard. S-tronic, which can function like a normal automatic transmission or shifted manually without a clutch, changes gears in a brisk 0.2 seconds. On V6 models, a six-speed manual transmission is also available. In the new high-performance TTS, you'll find a highly modified version of the 2.0L turbo, which puts out a potent 265 hp and 258 ft-lb of torque, good enough to propel the car to 60 mph in just 5.2 seconds. The quattro system and S-tronic transmission are standard. The TT is built on the aluminum-alloy Audi Space Frame, which helps reduce weight; the bodyshell weighs only 308 pounds. When equipped with S-tronic, the 3.2 quattro reaches 60 mph in 5.5 seconds, while the 4-cylinder takes as 6.3 seconds. The all-wheel-drive system that comes with 3.2 quattro models sends 85% of engine torque to the front wheels for normal driving, but as needed it can send up to 100% to the rear wheels. The TT features a sport-tuned suspension and all models come with excellent brakes. On all TT models, in coupe or roadster form, a rear spoiler deploys at 75 mph and helps enhance stability. A notable option is Audi Magnetic Ride, which allows for multiple suspension modes; the system uses fluid that alters the suspension's stiffness depending on the voltage applied. It is standard on the TTS and available on the 2.0 and 3.2. Head and thorax side air bags and front knee air bags are standard. All TTs come with automatic climate control, cruise control, a tilt/telescopic steering wheel, an automatic wind deflector, and a driver-information system. Several major packages are available, including an interior package with Nappa leather upholstery and trim, an audio package with a 255-watt amplifier, and an interior package that brings bright-colored schemes. Xenon headlamps with the adaptive cornering light function, to help with visibility on dark, curvy roads, are also optional. Handsome 17-inch wheels are standard (18-inch on the TTS), but larger 18- and 19-inch alloys are available. An iPod interface is also available.