I was able to find the following information for the total weight of the vehicles in metric tons:
Arjun mk1 .................58,5 t
Arjun mk2 ..................67 t (+9 tons to the original Arjun mk1 . I am not sure if these are metric units. Seems to quite a large addition)
Challenger 1........................... 62 t
Challenger 1 mk3 .................. 62 t + kit weight (at least 5t)
Challenger 2 ......................... 62,5 t
Challenger 2 uparmored ....... 62,5 t +kit weight (at least 5t)
K1..................... 51,1 t
K1A1................. 53,1 - 54,5 t
K2..................... 55,0 t
Leopard 2A7+.......... 67,5 t
Merkava Mk 1......... 61-63 t
Merkava Mk 2......... 63 t
Merkava Mk 2D...... 63+ t
Merkava Mk 3........ 63,5 t
Merkava Mk 3D..... 65 t
Merkava 4............. 65 t (seems to a bit off. It is more likely to be around 70 t)
Merkava 4M.......... 65+ t
M1A2 SEP v2 with Tusk 1 and 2 the M1A2 SEP (v1 or v2) weighs 63,1 metric tons total. , 24,4 tons for the turret and 38,7 tons for the hull. This weight does not include TUSK. The kit most likely will weigh in excess of 4 metric tons
Type 90................ 50 t
Type 10............... 48 t (in most upgraded state)
T-80U.................. 46,0 t
T-90S.................. 46,5 t
t-90 MS ............... 48 t
BM Oplot ............. 51 t
ZTZ 98................... 51,8 t
ZTZ 99A1.............. 57 t (seems rather heavy for relatively a small turreted vehicle)
ZTZ 99A2 ................ 58 t (seems rather heavy for a relatively small turreted
vehicle)
Leclerc S1......... 54,5 t......... turret weight 18,5 t .......hull weight 36 t
Leclerc S2......... 56 t........... turret weight 18,5 t .....hull weight 37,5 t
Leclerc XXI ........ 58 t........... turret weight 20,5 t.... hull weight 37, 5 t