Audi debuted the 3.0 TDI clean diesel engine in the Audi Q7 SUV; now, the world's cleanest diesel technology will also be available in the best-selling Audi A4. A package of technologies provides innovative solutions for engines and the after-treatment of exhaust gas.
The engine features a new common-rail injection system (which generates up to 2,000 bars of pressure), innovative pressure sensors in the combustion chamber, and an especially high-performance exhaust recirculating system. Collectively these measures ensure a highly efficient and low-emission combustion process. A novel DeNOX catalytic converter, integrated within the end of the exhaust system, reduces residual nitrogen oxides. Just upstream of it, a pump injects an additive named AdBlue into the hot exhaust flow; there, this aqueous solution decomposes into ammonia - which splits the nitrogen oxides into nitrogen and water.
The Audi A4 3.0 TDI clean diesel quattro already complies with the emission limits of the EU's Euro 6 standard, expected to become law in 2014. It is also very fuel-efficient, with the potential to cover up to 42.1mpg (Avant: 41.5mpg). And this TDI engine is indeed a powerful performer, needing only 6.2 seconds (Avant: 6.3 seconds) to go from zero to 62mph. Top speed is electronically governed to 155mph. In conjunction with a six-speed tiptronic and quattro permanent all-wheel drive, this vehicle guarantees a high degree of comfort and superior traction.
This is a 12-year+ news article, from our Audi archive, which dates back to the year 2000.
If in doubt check with your local Audi dealer as car prices and technical data will have changed since 2009.
Although our car news is published in good faith, we cannot guarantee it to be error free or complete or up-to-date.
Audi A4 Images may not be UK specification cars. Colours and exterior and/or interior elements may differ from actual models.
The car news and images remain the copyright of the rights holder and may not be used without their consent.