Hi,
I've heard about BMW building and supplying aircraft engines to the Nazis in the second world war. Then they went into cars producing the 507. Mercedes also has an interesting history going back many years. Porsche, Ferrari, Maserati etc all have historic pasts starting around the era of the Second World War.
Somehow, I don't recall Audi having any history before the 1980s when the quattro Rally car was squashing it's competitors.
Does anyone know anymore about Audi's past, prior to the 1980s?