Here is an interesting comparison test between the Porsche Cayenne Turbo and its slightly more powerful brother, the Cayenne Turbo S. The Porsche Cayenne Turbo is powered by a 4.8-liter 8-cylinder engine that develops 500 hp at 6,000 rpm and 516 lb-ft of torque. The Cayenne Turbo is able to get from zero to 62 mph in 4.4 seconds. The Porsche Cayenne Turbo S is powered by the same engine, but it develops 550 hp and it needs just 4.3 seconds to get to 60 mph.