Audi has a leading role in diesel technology based on a competitive edge that goes back decades. Audi engineers have achieved decisive breakthroughs time and time again. The largest being the world's first TDI engine in a car introduced by Audi in 1989. TDI is today a strong economic and efficient alternative for the power engine of the future. The modern common rail system sends 1,800 bar of injection pressure to the fuel injector needles with PASO injectors, which distribute the power optimally in the combustion chamber. Due to the extremely quick reaction time in millisecond range, up to five separate injection processes can be achieved per cycle, which are also variable. In addition to the main injection processes, pre and post injection processes are also possible. The injection moderates the acoustic hardness, the so-called rackling of the combustion process. Post injection is specifically to raise the temperature of the exhaust gas and therefore for regeneration of the standard diesel particulate filter. These factors together allow exact, highly efficient combustion. The TDI turbochargers are part of a new generation. In the intake manifold of the engine, there are swirl flaps which are used to regulate the inflow of air in order to achieve optimal combustion. This use of technology allows high maximum torque of 5,400 RPM and clearly improves the thermodynamics in the combustion chambers. It allows the engine to run with a very high rate of backfed and heavily cooled exhaust gas. The condo combustion with lower oxygen content massively lowers the output of nitrous oxide. Economy, low emissions, large power output, realized by forward looking technologies. The latest generation TDI engines are highly efficient high-tech power units.