It seems the iranian president and his foreign minister crahsed with their helicopter somewhere in the mountains. Wouldn't be a huge loss for the world if they were killed.
They have a lot less russians willing to fight than in WW2, thats why they used that many prisoners. Remember how many russians fled their country after the first mobilization law was announced.
The 211 had a classic two-speed supercharger. It probably lacked some power with its 3-valve design instead of 4-valve on DB engines.
It was never really intended for fighter use so they likely opted for a longer service life instead of maximum power.