The petrol-electric saloon will do 34 miles on electricity alone.

The order books have now opened for Audi’s new plug-in hybrid A6 executive saloon, which costs £52,790 in its cheapest guise. Dubbed the 50 TFSI e, the newcomer will offer an all-electric range of 34 miles per charge, while Audi hopes company car drivers will be enticed by the 10-percent Benefit-in-Kind tax rate.