The Audi A5 can be a relaxed tourer, especially in convertible body style with a beautifully insulated soft top, or a raging track star embodied by the 444-horsepower RS 5. Somewhere in between is the sensibly sporty S5 whose turbocharged 3.0-litre V6 generates 349 horsepower. An Audi trademark, quattro all-wheel drive is standard across the lineup.