Those expecting the usual evolutionary Porsche baby step in horsepower will be disappointed. From the 415 horses (SAE rated) in the 996 Turbo (the 993 Turbo had 400), the 997 now bumps against the Ferrari F430 with an upgrade to 473 horses--a 14-percent boost and just under seven percent more than the 444-horse 996 Turbo S.
Torque delivery from the reworked heroic 3.6-liter boxer-six also is improved, thanks to the new Variable Turbine Geometry turbochargers good for up to 17.4 psi boost. Movable vanes change the angle at which air blows on the turbines depending on engine speed and throttle position. Power builds sooner and more smoothly, while more torque is available across a wider rev band--all 457 pound-feet from the 997 Turbo can be accessed between 1950 and 5000 rpm. And with the Sport Chrono option, the overboost function allows 501 pound-feet of torque for 10-second spurts.
Click here to read more about this Future Shock 2007 Porsche 911 Turbo article.
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