It seems that the games do not simulate the airplanes of WWII in every detail.
I have played with Achtung Spitfire and Over The Reich for PC, tactic games with WWII airplanes. When you turn hard with your fighter you lose speed and altitude, and you lose more of them if your turn drag is high. If you make so for a long time you are meat on the table if your opponent is faster.
The plane that lose the less (because is aerodynamically more efficient and have a more powerful engine) get the tail of the other that is slower.
A P-51 Mustang or a Spitfire may outmaneuver a FW-190. In fact Mustang may turn faster and loses less speed and altitide than the FW-190 and Spitfire IX is event better at doing so.
Moreover Mustang and Spitfire have a powerful engine with a good accelleration, better than the Zero, so you may turn hard and then break off at high speed and diving, then return to dogfight, gradually your speed advantage will bring you on the tail of a slower Zero.
The experts German pilot (very few) know that, and uses the diametrical opposite tactic: hit and run. FW 190 keep high speed and make a slashing attack at the P-51 do not engaging in dogfight but running away to a safe distance, then turning back an making another pass, blazing with all the FW-190 firepower. Try to do little maneuvering and keep the speed high. You may turn back using an Immelman and run away making a power dive.