Comparing: KV-5 vs. FCM 50 t

Development was started in June 1941 at the Leningrad Kirov Plant and completed by August, but the German invasion prevented development from progressing to the prototype stage. The KV-5 was expected to share some components with the KV-1. A new turret was designed, incorporating the 107-mm ZIS-6 gun. Early plans called for a new 1,200 hp diesel engine, but later adjustments, recognizing wartime disruptions, replaced this with two V-2K engines.

Development was started in December 1945. The vehicle was conceived as an alternative for the AMX 50t and combined archaic features typical of the pre-war French tank-construction industry as well as German innovations. The vehicle was to be equipped with an additional container trailer, equipment for underwater driving, and a demountable mine clearer.