Both the Porsche and the Volkswagen have a rear mounted air cooled engine, yadda yadda [many other similarities].
So why would a "car for the people" commissioned by the Nazis share so much in common with a sports car?
They have the same designer!
[much blather about genetic similarity, a smattering of corrupt information theory, and a little bit of thermodynamics for seasoning].
I don't really have the strength to do it right... the argument is archived on talkorigins.org, so you can look there for the relevant talking points (and rebuttal).
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Simple Machines in Higher Dimensions
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