Kevin J
Banned
Yes best was I-16 type 24 at 303 mph.Gloster Gladiator: 100 HP more with it's Mercury vs. I-16's M-25A or B engine, yet 20-25 mph slower. One wonders how much faster the I-16 would've been with 840 HP Mercury on board and closed canopy.
Avia B-534: 100 HP more, again 20-25 mph slower.
Dave - the 320 mph figure is on English-language Wikipedia. Soviets give max of 470 km/h (292 mph) for latest versions, powered by M63 engine.