Audi Sport Quattro concept highlights 30 years of tech progress - CNET

At the upcoming Frankfurt auto show, Audi will show the Sport Quattro concept, not only a 30-year anniversary marker for its original Sport Quattro, but an illustration of incredible technological progress.

Electric Vehicle News: December 2013

Audi Quattro concepts - Video - CNET

Quattro to e-tron: a history of Audi breaking tech barriers on track

Audi Sport Quattro Concept First Look

Audi Quattro concepts - Video - CNET

Audi Quattro concepts - Video - CNET

Audi Sport Quattro - Design Analysis - Deconstructed Headlight Styles »

Audi quattro concept - Wikipedia

Paris 2010: Audi Quattro Concept celebrates 30 years of performance - Autoblog