F4u-4 and F8F

[Laurwin]

Yes it was perhaps oversimplification on my part, I should not have lumped together 1939 british fuel with high octane American fuel. Probably there was not so much lend-lease during battle of britain.

But as a matter of fact, bf-109 (and also fockewulf) have worse power, speed, climb and ceiling. When compared to more modern Allied fighters in 1943-45 (I consider ta152 as separate design)

matchups against spit mark9, mustangs, thunderbolts...(im unsure if corsair is better up high, vs german)

Reason for this good allied performance, compared to poorer german performanc at high altitude, lies partly in the fuel quality difference (which affects compression rate in engine)