The Audi multitronic transmission combines the responsiveness and fuel efficiency of a manual gearbox with the convenience of an automatic.
Thanks to its continuously variable ratios and adaptive map control, multitronic provides seamless acceleration, and always uses the optimum engine speed for the circumstances. Because of this control near to the operating optimum, fuel consumption can in some cases actually be lower than with a manual gearbox.
Article source: www.audi.co.uk