Two Coupes with some similarities, but otherwise different in most aspects such as the starting price, fuel economy, horsepower, ground shadow size, and height. First of all, there is a $252,750 difference in the base MSRP. The 2018 Lamborghini Aventador Coupe has a higher starting price than the 2018 Audi R8 Coupe. Also, the 2018 Aventador Coupe has bigger and thirstier engine; the 2018 R8 Coupe gets 5 more mpg. And finally, comparing the dimensions we see that the R8 Coupe is slightly smaller, although it's taller than the Aventador Coupe. Among similarities are the body structure, market segment, and maximum occupancy.