Two Coupes with some similarities, but otherwise different in most aspects such as the model year, starting price, horsepower, fuel economy, and ground shadow size. First of all, there is a $55,250 difference in the base MSRP. The 2013 BMW M6 Coupe, an older vehicle by three model years, has a higher starting price than the 2016 Audi S5 Coupe. Also, the 2013 M6 Coupe has bigger and thirstier engine; the 2016 S5 Coupe gets 4.5 more mpg. And finally, the S5 Coupe has a slightly smaller body than the M6 Coupe. Among similarities are the body structure, market segment, height, and maximum occupancy.