Introducing the Audi S5 Sportback: great engine, handsome looks and a lovely interior the S5 Sportback has the perfect balance of style and power. Merging beauty, practicality and performance to create an exquisite driving experience. The S5 Sportback comes with big power and big acceleration thanks to the 3.0-litre TFSI V6 engine at the heart of the S5 adding to the sporty nature of this model.