Inspired by aerodynamic design trends of the 1930s, the DKW F9 prototype was targeted toward potential Volkswagen Beetle customers in Germany. Unlike the Beetle, it featured an engine in the front (a 3-cylinder two stroke engine) along with front-wheel-drive, and had an extremely low coefficient of drag for its time (.42 Cd). Originally targeted for production as a 1941 model, World War II intervened and the F9 did not actually see production until 1949-56. (Photo credit: Sean Connor)