Increasing performance while enhancing fuel economy. The Cayenne comes in a choice of three different drive systems, each featuring state-of-the-art technology for high efficiency and relatively low fuel consumption. The gasoline-engined models already operate on fuels with an ethanol content of up to 10 percent. This further improves the carbon dioxide balance since the plants grown for the production of biofuels absorb carbon dioxide from the atmosphere. As you can see, for the benefit of the environment, we are continually working on making our cars more efficient – as well as compatible with alternative fuels. While ensuring that they remain one thing: a thoroughbred Porsche.
We have also applied the highest standards to our gasoline-engined models in order to protect the environment from fuel evaporation. The non-return fuel supply system provides a considerable reduction in vapor emissions. The lines carrying vapor are made from multi-layer plastics. A large active-carbon filter and multi-layer plastic fuel tank help reduce evaporation still further.