It seems as though early cars made little effort to be aerodynamic. Surely they knew that wind resistance is a thing, and it seems with cruder engines it would be even more beneficial to lower resistance.
I also wonder what a 1920's person would have thought of a Corvette. Would they have though of it as obscene or did the sexualization of those kind of shapes come later?
I actually just watched a video that Vox produced on this topic. I hope it's not taboo on this group to post basically just a link, but it's a very informative look at this exact topic. https://youtu.be/IVjmIovOPek
Air resistance is quadratic relative to the speed. This means that if the speed doubles, air resistance will quadruple. If the car is ten times faster, air resistance will be 100 times more. This means that a car that has a speed of 130 km / hour will have 42 times more air resistance than a car that has a speed of 20 km /hour. So, for early cars, air resistance didn't matter.