Agreed but In a offensive desert scenario, the faster and lighter the tank the better. This combined with good anti tank weapons is much better than heavy and elephant like Arjun tanks
First of all its a myth that light tanks perform better in desert.
First lets compare the tanks
LInk for arjun
Arjun VS Al Khalid
Maximum Speed: 40 km/h VS(lets assume) 40 KMPH (off Road Speed)
Maximum Range: Un-refuelled range 450 km VS 400 KM
Power to Weight Ratio: 23.93 hp/ton VS 26 hp/ton
Combat Weight: 58.5 tonnes VS 45.5 tons
Crew : 4 VS 3
Ground Pressure: 0.84 kg/cm2 vs (not Avaliable but ite higher than Arjun, Pakistanis tried bringing it down bu rubber pads, but it still remains higher. Thats why no Pakistani sites mention this. AK is more likely to sink in sand than Arjun)
(please note that ground pressure of T-90 is 0.87 kg/sq cm and T80-UD is 0.93 kg/cm2. Even if Arjun is heavier, the ground pressure is lesser than lighter tanks)
Gradient: 77º vs 60 % / 40 %
Trench Crossing: 2.43 m vs 2.7 m
Now tell me in terms of these characteristics, which tank will survive desert better? Al- Khalid had advantage in just power to weight area and trench crossing, but this difference in just 3 HP and 3 m. Obviously Arjun is better in Desert survival.
Additional advantage for Arjun is its suspension. "It has a hydro-gas suspension, which is akin to the landing of an aircraft. You get more pressure than when an Airbus lands
It has special filter system that keeps out dust, the tank can operate in the desert. Its cables and connections are protected from dust and it has a provision for deflogging the radiator and heat exchangers. The engine will never be shut down even in the most critical conditions. This addresses the heat transfer phenomenon. The tank, without air-conditioning, can dissipate heat." Arjun's design is modular, including that of the weapon system, turret and the power pack. "You can change the power pack in the field in 45 minutes. Elsewhere, it takes 14 hours,"
Except for some filters Al Khalid dosen't have any of the features.
Undoubtly Arjun is best suited for Desert fighting that a Light Tank like Al khalid.
Now i have taken a lot of data to support my argument. I challange any Pakistani to challange me on basis of data.