AUDI has stuffed all of its latest M3-fighting technology into the A5 coupe and called it RS5. Boasting 331kW of power and sophisticated quattro grip, the RS5 is a master blaster that can gobble up kilometres and corners with consummate ease. The most powerful version of Audi’s hunky 4.2-litre FSI V8 has been given a lift in terms of both power and fuel efficiency, shading BMW’s contender in both regards. However, that has come at a price, with Audi charging a significant premium over the M3 and even Mercedes-Benz’s autobahn burner, the C63 AMG.