Over the decades there have been many one-off or limited-production vehicles that have been lost to the sands of time, and many cars ... and sketches that were buried in the Audi and Porsche ...

after teasing us with sketches earlier this month. "The Audi TT offroad concept provides a glimpse of how we might imagine a new model in the future TT family," says Prof. Dr. Ulrich Hackenberg ...