Audi, the inventor of TDI, blazes a trail in the field of engine manufacture. At the 27th annual Lake Wörther Tour being held at the end of May in the Austrian province of Carinthia, the brand behind the four rings is showcasing this technology’s potential with a sensational study. The two-liter TDI unit under the bonnet of the Audi A3 TDI clubsport quattro delivers 224 hp and musters up 331.90 lb-ft of torque – the sort of pulling power normally associated with a sports car. The show car races from 0 to 62.14 mph in just 6.6 seconds and attains a top speed of 149.13 mph.