The Arjun was a good tank even two years ago. Now I am not so sure. Technology seems to have passed the L11A5 type 120mm rifled guns. Adding the Lahat doesn't really address the underlying problem of gun power.
Even now it is very good tank, just seen it my self last year, even manage to measure some of the armour and compaire it with other T series tank. Gun is good and so it LAHAT, done lot of research my self.
The Al Khalid and Type 98 are modern, if not cutting edge. From the front they have respectable protection that demands a high velocity gun. Using HESH rounds on them will not work.
I cant say much, what they have got inside, but from the protection part and what they got in terms of firepower, they are Ok, but not against ARjun tank. AL Khalids armour is not that good. DRDO is working on increasing the velocity of gun. I think it can take out Al Khalids.
Add to this the lack of a modern FLIR and CITV on the Arjun, lack of digitalization, lack of battle management, an engine no longer in production and a training program rapidly going towards a complete 3 man crew set up.
Arjun has FLIR system, which is modern, it has BMS and that system is not avaliable on T 90 or any other version of T series with IA, as far as training of three men crew is concern, it appears that you are confusing the Arjun with IA's training, when ARjun, will be inducted method of training will be change.
It is time to forgo the Arjun and if India wants a domestically produced tank, take the parts of the Arjun that work and create an Arjun II. A better gun, 1500hp MTU engine, ERA on the sides and top, CITV, battle management system, better FLIR for the gunner, keep the suspension and hull/turret designs, keep the Lahat etc.
I dont think you are at all aware about the investment gone into the Arjun and the factory they setup, CAG will hang govt if that happens. As far as engine is concern, local engine will be produce by the private company provided sufficent orders are recieved by IA, which is not coming, its suspension is so good that IA want it on FMBT. BMS of next generation is ofcouse needed.
Build more CL70 bridges and rail cars, develop a doctrine that uses a 60 ton tank and create a training program from recruit to unit to create units that can fight with and along side the Arjun.
Those things are planned and most of them are already implemented, but IA (DGMF) is creating trouble, with the obvious preferance for T series of tanks.
If India was facing invasion the task would be a lot easier. But in almost any realistic appraisal of the situation India is going to be the one going after Pakistan. This means bridging equipment. If you can't get across the canals fast, Cold Start is Dead Start. The Lahat is a decent anti-helicopter weapon v the Cobra if the optics are upgraded. But aside from that given the bridging equipment India has now the T-90 being lighter can be gotten across faster and at more points.
Actually if you look at the requirement of IA which is more then 3800 tanks, Arjun or T90 alone cannot done that role, what we need is combination of both. We need light as well as heavy tank for IA.
Unless India suddenly decides to invest in the tail behind the Arjuns tooth, its a worthless waste of money.
I dont agree with you, Arjun tank is so good that it can withstand direct hit from point blank range, whereas T 90 S can be easily penetrated and once that happen Crew is history.
Arjun is made to withstand punishment and is made keeping in mind crew safty, where as T90S is based on number doctrine of Second world war.