A perfect example of a 4-door coupe, the A7 relies on a 3.0-ltire V6 with 333 horsepower. The S7 sport version comes with a 450-horsepower 4.0-litre V8 twin-turbo, while the more extreme RS7 uses the same mechanics to come up with 560 horsepower. According to Audi, this fiery version flies from 0 to 100 km/h in less than four seconds. All of the above come with the quattro all-wheel drive system that we all know so well.