But the long and winding road to Audi’s mid-engined flagship actually began with a toe-in-the-water concept car: the Avus quattro. Having not looked at the Avus Quattro for a while, we couldn ...

Audi designers and engineers got to work. The result was the Quattro Spyder Concept. Shown at the Frankfurt Motor Show just weeks before the W12-powered Avus, the Quattro Spyder had production intent.

But while those cars’ styling is rounded and almost jelly-bean shaped, the H-Tron Quattro Concept looks like any number of Audi vehicles ... is conventional, the interior is more futuristic ...

The cabin of the Sport Quattro concept provides some interesting hints as to Audi's interior design direction. Simplified instrumentation relies on an LCD cluster and a head-up display ...

Though not particularly likely to see production, the Audi Nanuk Quattro Concept's interior is pretty feasible aside from the camera-based side- and rear-view "mirrors." The interior is designed ...

The interior of the Sport Quattro Concept is a refreshing departure from Audi's admittedly attractive and useable design, with sharp lines and lots of visible carbon fiber. There are seats for ...