For those who want the space and utility of an SUV and the high-performance of a sports car, they should check out the Cayenne Turbo. It's Porsche's top SUV model and it's an all-out performer.

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Beneath the sculpted hood resides a potent V8 engine that pumps out a whopping 500 horsepower and 516 pound-feet of torque. It's connected to a standard six-speed Tiptronic S automatic transmission and Porsche Traction Management all-wheel drive.

Eighteen-inch alloy wheels and tires are where the power meets Mother Earth, propelling the Turbo from zero to 60 miles per hour in a scant 4.9 seconds, on its way to a top track speed of 171 mph.

Indeed, this is one of the fastest SUVs ever, which is exactly what Porsche set out to do when it launched the Cayenne in 2003. In 2008, the vehicle saw a refresh with updated smoother styling, new direct-injection engines, plus the availability of an air suspension.

Of course, with this kind of power on tap to motivate the Cayenne Turbo's 5,000-pound-plus curb weight, fuel economy cannot be expected to be exemplary.

Environmentalists, stop reading now. Mileage is estimated at 12 miles per gallon in the city and 19 on the highway.

Cargo space in the Cayenne is good but not great. It has been criticized against its competitors. Nineteen cubic feet are behind the rear seats, which can be folded down to accommodate 63 cubic feet.

Many interior comfort and convenience amenities are standard on the Cayenne Turbo.

The short option list includes a rearview camera with parking-assist sensors, panoramic sunroof, four-zone climate control and Porsche Dynamic Chassis Control.