The Turbo version of the 997 series featured the same 3.6 L twin-turbocharged engine as the 996 Turbo, but this time it developed 480 PS (353 kW; 473 bhp) and 620 N·m (457 lb·ft) of torque. This was in part due to the 997’s VTG (variable turbine geometry), which essentially combines the low-rev boost and quick responses of a small turbocharger with the high-rev power of a larger turbocharger. As well as producing more power and flexibility, the new turbocharger improved fuel consumption over the 996 Turbo.
With these performance upgrades, it accelerates to 100 km/h (62 mph) in 3.7 seconds (with the manual transmission) and reaches a top speed of 310 km/h (193 mph). However, these are official figures and Porsche is notable for being conservative about their power and performance ratings. Motor Trend Magazine has clocked the 997 Turbo’s 0–60 mph time in 3.2 seconds with the Tiptronic transmission. Jeremy Clarkson on his “Thriller” dvd, showed that on a de-restricted stretch of autobahn with just the right downwards gradient, the car maxxed out 200 mph (320 km/h). The optional Sports Chrono overboost package increases torque to 680 N·m (500 lb·ft) for short periods (maximum 10 seconds) but over a narrower rev range.
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).
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.