Yesterday ISRO operated the GSLV MK2 launch vehicle, which is a medium lift launch vehicle with a capability to lift 5 tonnes to LEO.
I just compared Falcon 9 with GSLV MK2. Falcon 9 capability to lift 23 tonnes to LEO is almost 5 times as much as the GSLV. So I expect a similar difference in thrust for each rocket.
GSLV First Stage : 760 kN * 4 (L40 Straps) + 4,700 kN (Solid core stage) = 7740kN
Falcon 9 FT First Stage : 825 kN * 9 (Merlin 1D+) = 7425kN
Both LVs first stages burn duration is around 160 seconds. Specific impulse also does not have much difference for both Vikas and Merlin engine. Also GSLV third stage uses a cryogenic engine with very high Specific impulse.
Still what are the main factors which allow Falcon 9 to perform 5 times better than GSLV Mk2?
Is the second stage of GSLV the main reason?