If you've always wanted a blisteringly fast sports car butyou couldn't accept the inevitable sacrifice in practicality, his 2015 Audi RS7 just might be your ideal ride. Based on the relatively mild-mannered A7hatchback sedan, he RS 7 boasts a turbocharged 4.0-liter V8 engine that beltsout 560 horsepower and 516 pound-feet of torque. For perspective, hat's 10more hp and 118 more lb-ft than the flagship V10 engine in Audi's R8 supercar.Even though the RS 7 weighs nearly 900 pounds more than the R8 V10 Plus, heyboth sprinted to 60 mph in just 3.4 seconds at a test track.