Volkswagen has many years' experience in TDI technology. In many countries, TDI is a registered trademark of Volkswagen AG. The TDI badge identifies all the Group's diesel-powered models featuring diesel direct injection and a turbocharger. Characteristic features of the TDI engines are fuel economy, low emissions, high pulling power (torque) and outstanding power efficiency. Functionality: A turbocharger supplies the engine with fresh air, thereby providing optimum cylinder charging. After compression, the diesel is injected directly into the cylinders at very high pressure by way of a nozzle. Effective engine encapsulation keeps noise to a minimum, while hydraulic engine mounts ensure smooth, low-vibration running.