Audi A8 TDI: Range For Days... Literally

The Audi A8 TDI is a fantastic road car with loads of features, oodles of luxury, and a brilliant diesel engine that's well suited to the genre. And, thanks to a large fuel tank, it has tons of range. We test the range by visiting some of the world's largest roadside objects and find out how many we can see on one tank before we run dry.