2006 Porsche Cayenne Turbo S Preview

Until recently, it was thought to be impossible for any automaker to surpass the twin-turbocharged 450 horsepower 4.5 litre V8-powered Cayenne Turbo for speed or acceleration, but every event has a time, a place, an opponent, or in this case, two. Eager to claim a piece of the high-performance SUV pie, Jeep and Mercedes-Benz have created two massively powerful super-SUVs, both of which topple the Porsche in 0-100 km/h acceleration times. But fear not, for Porsche isn't resting on its laurels, particularly when it's being out-gunned by a Mercedes-Benz ML63 and a ...