When it comes to turn radius, even the least maneuverable WW2 fighters can easily turn inside any modern jet.
Generallly in air combat, all other things being equal, it's turn radius, not rate, that is important. While an F-16 can sustain a 9G turn, it's speed is so much higher, than say, a slower ww2 fighter which would easily stay inside his turn radius. At least untill the F16 went vertical and left the spitfire behind.