The Audi RS5 looks — and sounds — a lot more like a muscle car than its rival, the BMW M4. Opt for the $1,000 sport exhaust and you'll hear the wonderfully thunderous melody of the naturally-aspirated V8 engine. The exterior of the RS5 is aggressive and muscular, hinting at the power that lurks beneath the hood. The engine bay also puts the motor on display with swaths of carbon fiber and red-painted cam covers. It's a very polished muscle car and a wonderful all-wheel-drive alternative to the M4 if BMWs aren't your thing. Base Price: $71,825 Engine: 4.2-liter V8 Horsepower: 450 0-60 mph: 4.4 seconds