Audi has many years of experience with TDI® technology, which it pioneered in 1989. In many countries TDI® is registered as an AUDI AG trademark. It identifies
direct injection turbocharged diesel-engine Audi vehicles. Characteristics of TDI® engines include economy, low emissions, power (torque) and performance. Working principle: a
turbocharger supplies fresh air to the engine and assures optimum filling of the cylinder. Immediately after compression, the injector delivers diesel fuel at very high pressure. Effective engine encapsulation keeps noise levels low and hydraulic engine mounts ensure smooth running and low vibration.