Some food for thought...
The DKW 1000S and 3=6 cars of the late fifties and early sixties has a similar shape as the beetle. Think cd is 0.40.
Main differences are : at the rear, where the roofline ends, it is less rounded than the beetle, creating a breakaway point.
Also the rear part of the front fenders blend into the bodywork, reducing turbulence there.
Even with it's more upright windscreen and fifties-design,
it had nearly the same cd as the new beetle.
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