I'll bet many of said cars will end up not really having the right proportions for the internals or correct door placement. It will be recognizable as a car, sure.

Getting into the weeds a bit we see this more obviously with drawings of tanks, ships and planes that aren't drawn with a reference to a real one - guns too big to fit inside the turret, the turrets themselves being way too big, no consideration for where the engine must be etc.