BIGGER, better and now offering the choice of a muscular turbo-diesel - in quattro all-wheel-drive guise only - the slick new Audi A6 with its bold grille and tasteful interior combats the luxury class with technology and style. The turbo-diesel could in fact be the choice pick in a range that offers two petrol V6s and a 4.2-litre V8 – it has more torque than the latter and better economy than any of the petrol engines. Importantly, the new A6 is more refined than its well-sorted predecessor, which means better on-road dynamics, and the interior – already pretty spacious – offers even more lounging room. And the massive boot is the biggest in class, proving that luxury doesn’t mean you need to sacrifice utility.