The final version of the Su-6 (S2A) with the Mikulin AM-42 liquid-cooled engine and revised wing planform developed in competition with the Il-8 and Il-10

The initial two-seat version of Sukhoi's shturmovik, the Su-6 (S2A), which retained the troublesome M-71 engine.

The mixed-power Su-7 interceptor fighter based on the original Su-6 (SA) design but having a turbosupercharged M-82FN engine driving a four-bladed propeller and an RD-1KhZ rocket motor in an extended tail.