In real historical setting, the Axis should be at great disadvantage in Op. Cobra.
I checked in last play that the turning radius in FW is somewhat superior to P-51.
Nice joke... How did you check that? By counting seconds in your head?
It's easy, you don't need Asian level math.
Just get some bots to tail you, shake him for a few times to make sure he is following you, then at speed of 560 (ASI provided inside the cockpit), do a perfect elevator turn at 90 degrees bank (BF2 unrealism made this possible) and keep it going. As FW-190A8, watch until the Mustang disappeared (I played with keyboard, since playing BF/ARMA games with joystick/yoke is stupid). As P-51D-20NA, watch until you get fired upon and explode, I did a few low/high yo-yo to dodge their gunsights.
Now to be fair, the P-51 is the clean config one (not the one carrying bomb), and the FW-190s always carry that external tanks, but I don't think the load affects its performance since it is not simulated in FH2.