On the face of it, the Audi S5 looks like a stylish and suitably sporty coupé. But if you're imagining a bone-shaking ride and an engine that drinks fuel faster than a Formula One car, this Audi A5 variant might surprise you. You see, unlike the range-topping Audi RS5 – which is all about performance – the S5 is a surprisingly easygoing companion that has a diesel engine capable of averaging more than 40mpg. It's still very fast, mind. Fusco Vehicle Sales - North Down's largest used car dealership. Generally over 200 cars & commercial vehicles ...