WWII Magazine has a great set of infographics by Max Gadney on their website. They cover various weapons, equipment, and vehicles, as well as comparison charts like the one above. These are great for adding that extra touch of realism or finding that extra bit of inspiration for your dieselpunk story.
Some guy bolted part of a fighter plane fuselage to a WWII-era or -replica motorcycle. It is awesome. That is all.