Comparing: A-20 vs. SU-85B vs. A-32

Development of the A-20 tank started at Kharkiv Factory No. 183 in December 1937. The project was a further development of the BT-7 tank and became a predecessor of the legendary T-34. Work on the vehicle was led by Mikhail Koshkin. On May 18, 1938, technical characteristics of the tank designated BT-20 were approved. Only a few experimental prototypes, with a wheeled caterpillar suspension, were built for training purposes.

In April-May of 1943, the SU-85B tank destroyer designed by the Gorky Automobile Plant underwent trials. The vehicle was a modernization of the SU-85A and featured the artillery LB-2 gun, 160-hp engine, and SU-76M chassis. The cabin, drive wheels, and spare parts kits were redesigned. Only one prototype was built.

Experimental medium tank. The A-32 and A-20 were developed and put on trials at the same time. The A-32 was adopted for service and evolved into the T-34.