Im not a huge P51 fan but from research ive done i believe the P51D has a max speed at 25000ft of 437MPH, and a crusing speed of 362MPH,
Well at 25000ft i can get it fluctuating between 340-345MPH, missing out on nearly 100MPH!!
Stall speed is roughly 100MPH, in this game i have it as roughly 130MPH, so thats not to bad.
lets see how the patch changes thnigs from whats mentioned here.
(nice to note that it can also pull an inverted loop below 350MPH)