As an SUV, the Cayenne offers a superb level of comfort. Unlike the 911, Boxster and Cayman, this vehicle is also available with a V8 engine, including an eightcylinder turbo model. Our customers prize the fact that a Cayenne drives like a Porsche. Four years on from the launch we have already been able to significantly lower fuel consumption by up to 15 per cent while also enhancing performance – thanks to new direct fuel injection.

At the heart lies an injector which sits directly on the cylinder head. As the name suggests, the valves inject fuel directly into each combustion chamber with the help of a high-pressure pump at a pressure of between 40 and 120 bar. This disperses the air/fuel mixture more precisely, increasing the mixing of air and fuel and because direct injection lessens cylinder temperature, more air than normal can be compressed into the combustion chambers. This boosts the energy density of the mixture and therefore performance under optimum conditions. It is possible to control the required fuel volume exactly via the duration and pressure of injection.

DFI can do even more than that, however. When starting the engine, for example, some combustion takes place in the exhaust manifold which helps the catalytic converter to warm up faster. This lowers exhaust emissions while using less fuel and boosting performance.