Quote Originally Posted by Iscah View Post
I haven't watched JoJo so cant speak for that, but FmA car designs are much more vintage-looking. They're fairly uncommon in the setting anyway but I skimmed through the manga looking for images – the first few pages of chapter 63 is an easy scene to reference – it is quite a boxy shape (and I don't know cars enough to say if it's accurate to anything) but it has the details like old-fashioned headlights and fenders and just generally looks like a car rather than a child's drawing of a car.
The Garlean cars look very much like they're based on old "people's cars". Basically a boxy, very basic car meant to be affordable and get you around the city, of which the original VW Beetle is a good western example. They're super iconic in Japan and Europe for the time period of the late 50's-early 60's and those plus the architecture we see feel like they're supposed to put our minds in the frame of a successful post-war industrialized nation with tons of resources and the safety of the modern world until they bombed themselves out.

The Garlean examples seem to be closest related to Datsun 110s, Toyota Coronas, and the kei cars that followed. The Soviet ZAZ Zaporozhets is an even boxier version of that same type of idea of a car in that time period, but the Novus D toy minion looks more like the Japanese cars with that front end.