Porsche has revealed the all new 2013 Porsche Cayenne Turbo S, its powered by a 550 horsepower twin turbo 4.8-litre V8 engine, which is enough to scoot this 4,883 pound SUV to 100 Km/h (60 Mp/h) in just 4.8 seconds. The Cayenne Turbo S top speed is 280km/h (174mph). The Cayenne Turbo S has retained the mantle of âfastest production SUVâ after it… Continue reading New Porsche Cayenne Turbo S with 550 HP