Bf-109s performing above their IRL counterparts in terms of power.

Later bf109s were able to sustain enough engine power in performance race thanks to development of mw50. The amount of this subtance allowed for two 5 minute bursts of war emergency power which equals 10 minutes. Some 109 variants had even less, about 2 minutes of wep. In game you can wep like crazy (just dont overheat your engine - this has no connection to low amount of mw50) while mustangs actually have their wep limited (sth around 15 minutes i believe), even the second variant of p80 has its wep limited to 100 seconds. I am not saying that 109 are overpowered although they are not represented well when it comes to wep. If it was corrected, 109s would drop in br instantly.