Popular Mechanics and similar technology magazines have always been interesting, but they were especially amazing before World War II. The pre-atomic age was an optimistic one and its representative magazines heralded a new era of humanity propelled into a futuristic utopia.
Chet Phillips, an artist who blends classic styles of early Twentieth Century illustration with modern themes, created a series of images that show iconic science fiction vehicles in this pre-war style.
If John Delorean had been born a couple generations earlier, perhaps his famous car would have resembled a 1930s Cord, as this version of the Back to the Future time machine does.
Firefly is a space western, so it's not too hard to imagine the Serenity as a dieselpunk machine.
The Spinner from Blade Runner allows pursuit of replicants that are probably more distinguishable from humans than you might expect.
Is Ghostbusters science fiction? I'd say that it blends science fiction and fantasy (what with ghosts and all). The Ecto-1 nicely fills out a Woody from the 1930s.
-via Nag on the Lake