Porsche 911  

The 997 Turbo features a new all wheel drive system, similar to the one found on the Porsche Cayenne. Featuring PTM (Porsche Traction Management) the new system incorporates a clutch-based system which varies the amount of torque to the wheels to avoid tyre slippage. This, according to Porsche, aids traction and the handling by redirecting the torque to control oversteer or understeer, thus resulting in far more neutral handling, as well as greatly improved performance in all weather conditions (as opposed to older AWD system which gave the Turbo stability under hard acceleration). However, in the facelifted 911 Turbo- launched in August 2009 -the PTM system has now been tweaked to give more a more rearward power bias. The new 911 Turbo also has paddle shifters for the PDK double-clutch gearbox for the first time. The new 911 turbo uses a completely different engine. The previous water cooled turbos (996 and 997) measured 3600cc and were based on the so called Metzger motor that powered numerous race cars. The new engine measures 3800cc and was first developed for the new carrera that was launched in 2008. The variable-vane twin turbochargers have also been extensively reworked to increase responsiveness, and the intercooler and fuel system have been uprated. It develops 493 bhp which is 20 bhp more than the previous model. The steering wheel also houses a display showing when Sport, Sport Plus and launch control have been selected through the optional Sport Chrono package.

Styling wise, as with the 996 Turbo the car featured more distinctive styling cues over the Carreras, one of the more distinctive elements the front LED driving/parking/indicator lights mounted on a horizontal bar across the air intakes. The traditional rear wing is a variation of the 996 bi-plane unit.

The Porsche 911 GT1 is a car that was developed in 1996 for the GT1 Le Mans racing class. In order to qualify for GT racing, 25 homologation road-going models were built as a requirement. These models developed around 700 horsepower and 0-60 in 3.3 seconds. Top speed was 235 mph. Both the road and race cars carried the same twin-turbo charged engine the Porsche 962 had, and the race car was a match for the McLaren F1 GTRs during which time it raced. A re-developed version of the 911 GT1 race car was built, and this model won the 1998 24 Hours of Le Mans. Although this car is not really considered to be a real 911 (largely because of its mid-mounted engine and built for homologation purposes) it is the most powerful and probably the fastest road-going Porsche ever made.