For the actual technical figures Yefim Gordons books are pretty useful.
Figures by themselves arn't much use in determining actual combat performance - all the figures have to work together in a dynamic unpredictable environment.
for example - Weight will vary with fuel and stores carried - which will also cause drag and slow it down. In a hot environment you also have reduced thrust (jet engines are better in the cold etc) which will reduce performance significantly.
The VPAF were supplied with:
MiG-21F-13
MiG-21PF(V)
MiG-21PFM
MiG-21MF
MiG-21U/US/UM
No answer really - depends on weapons used, IFF systems (used in 72), ROE, tactics used (still using fighting Wing?) experience of the MiG pilot (VPAF pilots got a lot of experience at that time - they flew for the entire conflict!), endurance.
In a lot of cases the MiG-21 was used as a hit and run fighter - it would intercept a US flight (via GCI) at speed, fire its missiles, which would hit the unsuspecting flyers, then hit the deck and get back to base at speed.