AUDI has mixed five-door practicality with super-charged excitement in its latest addition to its mid-sized A5 range, the S5 Sportback quattro. Designed to appeal to drivers who want the driving pleasure and performance of Audi’s renowned ‘S’ sports treatment while retaining a large measure of useful cabin space and luggage room, the S5 Sportback is powered by a super-charged 3.0-litre TSFI V6, instead of the 4.2-litre V8 of the S5 Coupe. This sportiest Sportback might lack the aural appeal of its burbling sibling, but look at all that room in the back ...