I read something about this car as I side story when Awsome built that twin engined Rally, It's an offical Factory special with two 1300 quad turbo (2 each) built to compete in pikes peak in the late 80's about 750bhp if one's memory serves one.
pikes peak is mad, i downloaded a few vids from vwvids ealrier and there a rather mad audi going up the hill .... i'd also reccommed downloading the audi tt 'bullitt' on the rollers, what a crazy car and vid !