The Sportback Concept and eventual A7 is Audi's version of a four-door coupe, like the Porsche Panamera and Mercedes CLS. In addition to providing a preview of the A7, the Sportback Concept previews Audi's future design vocabulary.
The Concept is powered by a 3.0-liter V6 TDI clean diesel. The diesel engine already meets the emissions limits of all 50 U.S. states and the EU6 standard scheduled to take effect in 2014. In addition it manages to get 39.87 US mpg.