If you're after a regular A8 (not the S8) then we reckon the 282bhp 3.0-litre V6 diesel 50 TDI is the most sensible choice because it costs the least to buy and is remarkably efficient on a run.

If you're after a regular A8 (not the S8) then we reckon the 282bhp 3.0-litre V6 diesel 50 TDI is the most sensible choice because it costs the least to buy and is remarkably efficient on a run.

Yet lurking towards the bottom of the ‘Models’ page is an old favourite: the Audi S8. Still a fairly subtle, super luxurious ‘bahnstormer, the kind of four-door saloon that would pass most f ...