This is brilliant!!! I love the subtle details, like C-3PO's leg being noticeably different, and even R2D2's wheels being old-timey looking. All of the 30's designs are spot on too.
I do have to say though, if I may make a tiny critique, that the car's face looks too modern to me. I think it's really just the shapes of the eyes and mouth. And I totally get that you're working that face into the land speeder's design (Cars style), but I think a little tweaking there and it'll be flawless.
Cant wait to see more! (slave olive oyl at bluto's palace?)