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All versions of the A8 get an eight-speed automatic gearbox and Audi’s active quattro four-wheel drive system as standard.
There’s also a 4.2 V8 diesel, which is fantastic to drive but a bit pricey next to the 3.0-litre V6. In fact, much the same could be said of the ludicrously rapid S8 and S8 Plus models, which use a heroically powerful 4.0-litre bi-turbo V8, while the 6.3-litre W12 is really for those with more money than sense, sublime as it is.
You can also get the A8 in short and long-wheelbase models, the latter being available with every engine apart from the S8’s V8, while the W12 is long-wheelbase only.