Penetration levels are dependent on rod penetrator
density, velocity and mass. The T-90 uses munitions with varying factors for the three criteria i have mentioned. There is no set number to how much a projectile should penetrate. There is countless sources claiming Russian 125mm APFSDS munitions having 650mm-750mm penetration at 0 degrees.
So then why claim the Al-Khalid is superior to the T-90 and then mention the T-90s fire control ballistics computer? The two tanks have never competed directly in field trials to come to any conclusion about how good, bad or basic the fire control computers are in terms of hit rate on either platform.
No one know the exact composition of the T-90s armor besides the developers and a handful of other people in their countries respective defense departments. If you can give some detailed specifics about the armor that would be a first.
Again, where did you get to go to sit inside a T-90? The Al-Khalid has a very small turret, its interior room is not much different from a T-90. There is an old rumor that you have to be a midget to fit inside a Russian tank something that Tom Clancy started. The T-90 is not the most roomy tank but the crew can move around just fine. Your other claim about cooling is false,
T-90s do have AC units, some T-90s were sold without them upon customer request. I also do not know what you mean by ecs and bms but chances are good that what you said is not true.
CAG report reveals T-90 tanks are vulnerable to heat 'because they ...
Here is a picture of a the T-90s gunner position. Granted this is a T-90MS but it is a T-90 nevertheless.
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You can "literally" keep going but you will "literally" keep getting all of your information wrong. The T-90 was never in any Saudi tender and to the best of my knowledge Saudi Arabia has never even inspected a single T-90.