A KV-3. The KV-3 was an experimental Soviet heavy tank based on the KV-1 but with a longer chassis, a new 850hp engine, 130mm armour, an upgraded turret and a new main gun. This article is a stub. You can help the World of War Wiki by expanding it. Retrieved from "https://worldofwar-htif.fandom.com/wiki/KV-3?oldid=10383" Categories: Article stubs Units Armoured Vehicle Tank Heavy Tank Combat Vehicle World War II Soviet Union Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.