they say the 90mm HEAT round is capable of defeating a T-72 MBT armor, and easily capable of defeating T-62 and T-64 armor. What's your thoughts on that, Paul?
My knowledge of current armour is spotty at best and especially with regard to '70s+ composite armour and modern AT rounds. The only thing I do know is the South Africans KOed a few T-54/55 and someone a T-62 in, I think, Chad. The Israelis tackled M-47s and M-48s. I got the impression that such kills were a bit difficult. One definite drawback was the primitive fire control system, more WW2 than '60s or '70s.
As for T-72, I have no good idea. The problem with T-72 and T-80 is that the levels of protection varied greatly. Most of the exported early T-72 were "monkey models" and lacked the ceramic infilling layer for the turret. In addition the 125mm export ammo was usually 10-20 years behind what was issued to Soviet units.
For a '60s era light armoured car it could deal with all WW2 or '50s-early '70s designs. Once composite and reactive armour became common then it would be limited to tackling light AFVs.