Porsche debuted at the 2006 Geneva Motor Show what it says is the most powerful Porsche to date: the all-wheel-drive 2007 911 Turbo. Reaching 62 mph requires a mere 3.9 seconds (3.7 seconds with the optional Tiptronic automatic transmission) thanks to a 3.6-liter boxer engine that cranks out 480 horsepower at 6,000 rpm and 457 lb.-ft. of torque at 1,950 rpm. The new Porsche 911 Turbo will go on sale in July, priced at about $123,000.