the auto union is a very famous car. hitlers men destroyed most of them during the war being idiots thinking they were being used to hide parts for bombs/planes. only 3 are left in existance. all 16 cylinders, two i believe are hill climbers which feature dual rear tires. they were the main attraction at the monterey historic races a few years back. i actually went to that race and saw all three in one spot, they actually ran one at laguna seca, all by itself of course. one of the neatest sounding cars i have ever heard. my grandfathers jaguar was actually on the cover of the program for that year of the annual race. the auto unions are truely a neat piece.