Frankfurt-Bound Audi quattro Concept Is Based on A6, Powered by 600 HP 4.0 TFSI
10 Aug 2013, 11:36 UTC · By: Mihnea Radu / Back in 2010, Audi dropped the quattro concept at the Paris Motor Show to celebrate the 30th anniversary of the famous car which most people associate with the brand. Unfortunately, nothing came of ...