Engines don't have to be unusual to be fascinating, and this wonderful two-stroke engine is proof. Meticulously handmade to keep the inner workings visible and to just look freaking sweet all ...

Detroit Diesel's 2-stroke diesel engines were eventually replaced with 4-stroke models, but parent company MTU still sells refurbished parts.

In 1931, Cummins put a version of its Model U diesel engine into a Model A Duesenberg and finished in 13th place at the Indy 500. The company returned to the Indy 500 in 1934 with two 135 ...