Analysis of information sources in references of the Wikipedia article "BMW 600" in Belarusian language version.
Another example of maximum interior room with minimum exterior dimensions is the new Isetta 600
In fact, an even more compact four-seater was built until recently by BMW in Germany, but the unorthodoxies of a rear-mounted engine and a front rather than side door, which allowed the saving of another 6 in. of length, were not acceptable to the public.