Comparing: AC 4 Experimental vs. Cromwell

The tank was developed in 1943. An order was placed for 400 vehicles. The prototype was created on the basis of the AC 1 tank with an enlarged superstructure, which allowed mounting a modified turret from the AC 3 tank with a 17-pounder gun. In July 1943, the work on the project was stopped at the final stage, as the program for creating the Australian cruiser tank was discontinued.

The Cromwell was developed in 1941–1942 by BRC&W. A total of 1,070 vehicles were mass-produced from late 1943 through 1945. They were extensively used by the British Army in the Northwest Europe Campaign of 1944–1945.