Available in coupe and cabrio versions, the A5 is equipped with a 2.0-litre turbo with 220 horsepower. The S5 gets a 3.0-litre supercharged V6 whose 333 horsepower can spirit the car from 0 to 100 km/h in 5.2 seconds. The S5 also happens to be one of the only sport convertibles on the market with all-wheel drive. Wondering about the divine RS5? It's not being offered this year.