Looking at P40 Speed Performance Numbers...

[ElAurens]

Originally Posted by secretone

I am no expert and I ask the following question in the spirit of learning. Did the Merlin in the P-40F have a two stage compressor like in the Mustang and Spitfire? I understand that the Allisons did not... If so, then I do not see why it was not the fastest of the p-40 series.

It was a two speed supercharger, not a two stage one, unlike the P 51, Spitfire, etc... that had 2 speed, 2 stage units. The F was the fastest above 15000ft.