The most exciting concept shown at the 2009 Frankfurt auto show is an electric sports car, the Audi e-tron. Borrowing body lines from the Audi R8, it can't help but look good. And boasting specs like 3,319 pound-feet of torque, it can't help but make gearheads drool.

Audi achieves that torque number by using four electric motors, one at each wheel. The drooling gearheads should be able to close their mouths again after hearing that the combined horsepower is only 313, making for a zero to 62 mph time of 4.8 seconds. But electric car enthusiasts will be happy to hear that the e-tron's range is 154 miles.

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