Porsche begins 2009 with an uncommon self-confidence, having recently taken over 51% of automobile giant Volkswagen's shares, which is no small feat. And now, the manufacturer introduces a new high-end version of its popular SUV, the Porsche Cayenne Turbo S. What makes this version so unique is its 4.8-litre V8 engine with a power output of 550 horsepower, 50 more than the regular turbo engine.