Just finished up my Chornobyl Speed Shop diorama, which takes place in an alternative universe's Ukraine where robot labor was a thing during the Cold War.
The car kits are a Toko Models GAZ-AA truck in 1:35, while the land speed racer is based on an old rubber band powered Hawk kit, which I narrowed, built a full bellypan and cockpit for, and stuffed full with a Tatra V12 tank engine.
Figures are from Imaquinaria, Industria Mechanika, and Blacksmith Miniatures.
The robot is STAN, from Futuristic Models.
The base was plaster of paris that I carved the lines into after it had set up, painted, and then added weeds and fencing.