The Audi A8 has been with us since 1997 in the US. It's Audi's biggest sedan, and it also carries the pride of being their most luxurious sedan. Now, the A8 is in its fourth generation.

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 ...