Two months after checking out the A5 DTM racer concept , Audi has whipped out the production model at the 2011 Frankfurt Motor Show . Internally named " R17 ," the Audi Sport Cars Concept …
The BMW i8 Concept retains much of the theatre and excitement of the BMW Vision EfficientDynamics concept that first previewed the futuristic sports car design at Frankfurt in 2009, and starred a…