AUDI has unveiled its 225bhp 3.3-litre V8 TDI engine in Vienna but Audi UK says it has not yet been decided which models the new powertrain will go in or whether it will come to Britain. The manufacturer says the engine's arrival follows 10 years of class-leading developments, from the launch of its 120bhp 2.5-litre TDI in the Audi 100, marking the first direct fuel injection engine designed specifically for use in a passenger car.

The new engine is said to meet stringent EU III exhaust emission standards, and its main technical features are listed as common rail technology, watercooled charge-air cooler, four valves per cylinder and two turbochargers with variable turbine geometry. It has a power output of 225bhp at 4,000rpm and a torque of 354lb-ft across an engine speed range of 1,800 to 3,000rpm.