Turbos are purely for improving the performance and are still only used on the top models. But the combination between smaller engines and turbocharging is a very promising way to lower the fuel consumption and CO2 emissions. Because of these two factors we will be offering turbo engines in models below the top series in the future. A four-cylinder boxer engine with a turbo is conceivable. But as before, the name 911 Turbo will only be for the model with the highest level of performance used.