The future oriented DIESOTTO-powertrain with its 1.8-l displacement, 4-cylinder spark-ignition combines the performance of a gasoline engine and the high torque and fuel economy of a state-of-the-art diesel together with extremely clean emissions. Additionally, CO2 emissions of a mere 127 grams per kilometer correspond to consumption of only 5.3 liters of gasoline per 100 kilometers (44.3 mpg), extremely low for a vehicle of this class. The new technology package includes features such as direct gasoline injection, turbocharging and a variable compression. At the core of this innovation lies the controlled auto ignition, a highly effi cient combustion process similar to that of a diesel. The DIESOTTO-system can be operated using conventional gasoline fuel.