Guys I fell over a post on the A2A Simulations website and it is NOT a reference to 'their' Spitfire but is an article on 'flying the Spitfire'.
What makes it interesting is that it gets away from the simplistic "mine is better than yours" attitude because as many of us know it is impossible to be sure of the circumstances of each aircraft when they meet in combat particularly regarding fuel/weight states, merge airspeeds etc.. Two aircraft as close in basic performance as the Spifire MKI and 109e could possibly reverse turn-capability claims if say under extremely different wing loading conditions and with airspeeds that favour one or other. Combat is never between the bare aircraft off the drawing board and even in compararative tests aircraft states have to be considered when drawing conclusions. Consider also whether you are talking about instantaneous turn rates to get that snap shot or sustained turn rates to wear down the angles and gain a shooting solution.
This link also gives turn rates of various aircraft. I don't know their sources but they make interesting reading and suggest that sources are available somewhere. I expect some 'reds' or 'blues' will disagree with the figures but it does at least make it clear that this is not a simplistic one-size-fits-all question and/or answer.
So here's the link, enjoy....
http://a2asimulations.com/forum/view...p?f=77&t=23909