Our fighters didn’t belong in the same sky with the ME 109 and the Spitfire; the Mustang was underpowered
Actally the best allied fighter was neither the Spitfore nor the Mustand but the Corsair. Of course it came very late in the war. Also the original Mustand wasn’t underrpowered as the Allsion engine was more powerful tan the Merlin at low altitude. That was fine for Mustang’s original role: not a fighter bit a ground attack plane. What teh Melin broughht was the high pperforamnce at lmatitude needed to amke a fighter version from the Mustang.
Also lets remind that better aerodynamics made the Mustang much faster than Spitfires using the same engine





