Audi unveiled two diesel-engine versions of its Q7 premium large SUV at the 2007 Detroit Auto Show. The 3.0 TDI and 6.0 TDI use diesel engines that employ DaimlerChrysler's Bluetec technology. Bluetec is a filtration system that uses a fluid called "AdBlue" to convert diesel fuel's nitrogen oxide emissions into nitrogen and water. This system allows the Q7 diesels to meet emission requirements in all 50 states. The AdBlue fluid is replenished during the vehicle's scheduled maintenance stops.

Q7 3.0 TDI models have a turbocharged 233-horsepower 3.0-liter V6 engine. The 6.0 TDI uses a turbocharged 500-horsepower 6.0-liter V12. Audi says the 6.0 TDI can accelerate from 0-62 mph in 5.5 seconds and attain 20 mpg in mixed city/highway driving. Audi didn't announce firm plans to bring the 6.0 model to the United States, but the 3.0 TDI will appear at dealers in late 2008.

Audi Q7 3.0 TDI and 6.0 TDI