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1. 2010 Audi R8 5.2 V10 As if the regular V8-powered R8 wasn't enough, Audi will release the supercar for 2010 with a 5.2-litre V10. The mid-engined sports car is built on a lightweight aluminum space frame and has been hailed as the "holy grail of horsepower,"pushing out 525 horsepower and a face-smashing 390 pound-feet of torque. With a design that's as sharp as a fresh razor, this Audi is sure to cut its way through to the list of sexiest cars of all time.