An optimised set of gear ratios keep the engine in its most efficient operating range during light loads and cruise, contributing in an overall improvement in fuel consumption and CO2 emissions of more than 13 per cent over the outgoing model.
Prices have yet to be announced for the new S4 saloon and Avant models, but expect a premium of around 10 per centover the outgoing car, which started at # 39,610 for the saloon.