Ah, well that's because I wasn't really drawing from, ahem, "common" cars . This is more like an upper-middle class type car (at least the straight eight prices - the $1200 is for the six, the eight is $1700 plus in the fine print), inspired by the expensive mid-priced cars (Studebaker Dictators & Essex-Terraplane Eights) and the cheaper expensive cars (Packard Light Eights/120s and Marmon Model 79). For example, a 32' Marmon 79 had a 110 hp 303 ci engine, and a 1934 Packard had a 120 hp 320 ci eight. I combined those type of large engines with a smaller, lighter body in a similar idea to the Essex-Terraplane Eight - but still bigger than a Ford/Chevy/Plymouth . For the six, well, I just multiplied the ci and hp by 3/4, assuming they shared basic architecture. A lot of the other engineering innovations are based off of the cheaper Packards as well. I chose Bruckell because it seemed the most luxurious of the three existing American brands, but if something else seems better for a decadent bourgeoisie ride like this please go ahead.