Audi has seemingly mastered the art of fitting big power in small packages. This has never been more evident in the 2014 RS 7, released at the 2013 Detroit Auto Show. It comes fitted with an impressive twin-turbocharged 4.0-Liter V8 engine capable of 560 horsepower and, on a good day, a 0-60 MPH time of only 3.8 seconds. Audi claims that the RS 7 can achieve 25 MPG due to due to a cylinder on-demand system, switching between four and eight cylinders depending on the needs of the driver. The Audi RS 7 is electronically governed at 155 MPH, but with an additional purchase, the governor can be removed—increasing the top speed to 189 MPH.