A revised – and even more powerful version – of the range-topping Audi A8, with direct injection and a capacity increase boosting the output of the engine to a towering 493bhp. Bigger bores ...

Audi's quattro all-wheel drive system, standard throughout the lineup, remains an asset for both all-weather handling and performance. With the addition of a diesel V6 for 2014, the A8 is able to ...