There are quite a few tanks in the Russian reserve stockpiles.
We do not know what state of repair they are in, or how many will be able to be brought into service.
That number could, reasonably, be between a few hundred and a few thousand.
Hey Sweden.... wanna grab St Petersburg?
With the corruption in the Russian armed services that has been exposed, I would imagine that the stockpiled tanks have not had faithful preventative maintenance pulled on them, if at all. That probably means that about 75+% of the tanks are non-operational and will require rebuilding to bring them up to standard. That will simply not happen in the time frame of this war.
There are quite a few tanks in the Russian reserve stockpiles. We do not know what state of repair they are in, or how many will be able to be brought into service. That number could, reasonably, be between a few hundred and a few thousand.
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That number is Zero. Orcs have no tank reserves, other than those attached to active units not in Ukraine. The entirety of the RGF had only about 2,500 working tanks before they invaded. The RGF is not the Soviet Army. Those days are gone.
All the rest are scrap metal, rusting, stripped for parts,engines sold on black market. They cannot be repaired - the expense would be far too much for Orc Land to afford - worse, any such effort would find much of the money stolen.
Orc tank factories have shut down for lack of chips and other embargoed tech. There are no new tanks coming for the Orc hoards.