For added performance, the S8 comes with a 563-hp, twin-turbo 4.0-liter V-8 that Audi says takes this plus-sized luxury machine from 0-60 mph in less than 4 seconds. The A8 and S8 get a free ...

For added performance, the S8 comes with a 563-hp, twin-turbo 4.0-liter V-8 that Audi says takes this plus-sized luxury machine from 0-60 mph in less than 4 seconds. The Audi A8 sees some minor ...

With warp fully engaged Audi claims the two-tonne A8 can blast its way from rest ... 4.2-litre V8 TDI version – which offers all the performance any owner is ever likely to demand – is thirty ...

Listen to the deep, aggressive roar of the Audi S8 V10 with a custom exhaust! This 5.2L powerhouse delivers an incredible symphony of high-revving sound, from a cold start to intense revs.

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 ...