The S6 is the highest specification model in the 2018 A6 range excepting the occasional RS6 model that comes along, but that isnt a permanent fixture. The new Audi S6 2018 model has an all new 4.0 litre V8 turbocharged engine that is also used in the new Bentley Continental. This gives the car slightly more horsepower more than the outgoing S6 model at 450 bhp, but as weight is down overall performance should be up, with 0-60 happening in around 4.4 seconds and emissions and fuel economy are greatly improved with CO2 at 214 and the official EU combined fuel economy figures at 30.7 mpg. Our best prices on a new Audi S6 for Sale are displayed above with our cheapest prices and the best deals we can find. The 2018; car is available in both saloon and avant formats, with the S6 Avant being around £2,500 more than the equivalent saloon, and specification levels are identical between the two. Just click on the model you are after to add your required colour and spec to see our what are our best new Audi S6 deals, and see how much you could save.