Audi AG used the 35th International Vienna Motor Symposium to offer a look at its next-gen Clean Diesel technology showing a new 3.0-liter turbodiesel V6 that's substantially cleaner, more fuel efficient and powerful than current unit found in the A6, A7, A8 and Q5 and Q7 models. 

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Great efficiency

This new 3.0-liter TDI boasts a wide range of innovative tech touches, starting with a reduction in internal friction. Overall thermal management has been enhanced thanks to individually controlled coolant loops for the block and heads while the turbocharger and variable-pressure oil pump received comparable upgrades. On the exhaust side, Audi's new TDI V6 is the first ever to combine a NOx storage catalytic converter, a particulate filter and SCR (Selective Catalytic Reduction) injection systems into a single unit. Audi says the enhancements give this new engine "significantly" more power and up to 13 percent greater fuel efficiency while trimming its CO2 emissions by an average of 24.1grams per mile. 

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Audi's new 3.0-liter TDI V6 will be available with either 215 or 268 horsepower, the latter cranking out 443 lb-ft of torque. The automaker has yet to reveal when the engine will appear in Europe or comment on plans to bring it to the U.S.  As a final flourish, Audi also showed a new 7-speed dual-clutch automatic transmission for its front-drive models with longitudinally mounted engines. This more efficient variant of the S tronic DCT reportedly cuts CO2 emissions by as much as 16.1 grams per mile. 

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