The Porsche Cayenne Turbo GT is the fastest model in the lineup, with a top track speed of 186 mph. Thanks to its 4.0-liter twin-turbo V8 that produces a jaw-dropping 631 horsepower and 626 pound-feet of torque, the Cayenne Turbo GT can sprint from 0-60 mph in as little as 3.1 seconds with the Sport Chrono Package. Alternatively, the Cayenne Turbo S E-Hybrid can achieve a top track speed of 183 mph while incorporating a battery pack for improved efficiency.