The heart of the new 911 models is the 3.8-litre boxer twin-turbo engine with variable turbine geometry (VTG). It sits in the rear and provides more power than ever before. The fact that fuel consumption and CO2 emissions are, nevertheless, up to 16 % lower is thanks, amongst other things, to the new standard efficient technologies. Including thermal management, electrical system recuperation or functions such as auto start/stop and ‘coasting’. Helped also by the further improved Porsche Doppelkupplung (PDK).