Porsche When Porsche debuted the Cayenne, it was basically just an SUV with Porsche badging. But with each passing generation, it becomes more and more of a proper Porsche with racy features you would expect to find on a 911. And the best testament may be the new Cayenne Turbo GT, which is the craziest track-beast Cayenne that Porsche has offered yet. Advertisement - Continue Reading Below Porsche The Cayenne Turbo GT uses a twin-turbo 4.0-liter V8 engine that puts out 631 horsepower — 90 more than the Cayenne Turbo Coupe — and 626 lb-ft of torque a retuned eight-speed Tiptronic automatic transmission. The Cayenne Turbo GT will accelerate from 0-60 mph in 3.1 seconds with the Sport Chrono package; it'll do a quarter-mile in 11.6 seconds and hit a top speed of 186 mph on the track.