www.eurocarnews.com - Porsche NA - As befits any flagship wearing the renowned Porsche crest, the 2010 Cayenne Turbo S is the most powerful Cayenne ever built. Sharing the same essential 4.8-liter V8 engine as the Cayenne S, GTS and Turbo, the Turbo S boasts 550 horsepower and 553 lb-ft of torque. That is a 10 percent increase in power and a 7 percent boost in torque over the Cayenne Turbo. The Cayenne Turbo S accelerates from zero to 60 mph (96 km in 4.7 seconds on its way to a track-proven top speed of 174 mph (280 km/h). Like the Cayenne S and Cayenne Turbo, the Turbo S comes standard with a six-speed Tiptronic S automatic transmission. Despite the astounding performance, the Cayenne Turbo S carries no fuel economy penalty over the Cayenne Turbo. Both the 2010 Cayenne Turbo and Cayenne Turbo S are EPA rated to deliver 12 mpg in the city and 19 mpg on the highway, and both are certified as Low-Emissions Vehicles, Tier II (LEV-II). Instantly recognizable as a Cayenne, and clearly identifiable as a unique model, the Cayenne Turbo S rides on standard 21-inch alloy wheels with 295/35 wide-aspect tires. Other unique visual clues to the flagships identity are the body-color wheel arch extensions and matte-finish air intake grilles. From the rear, the Cayenne Turbo S is instantly recognizable by its dual-twin tailpipes made of precision cast aluminum, inspired by those on the Porsche Carrera GT. Finally, the Cayenne Turbo S is available in a unique exterior color: Lava Grey <b>...</b>