tyb
Ageed it looks rather small.
Not a tankfag, but looks more like T-64BV as in (pic related)
If it is a T-64BV in the pic above, it is likely ukrainian (approx 43 t, 5 opposed cylinders, 10 piston, 13.6 L, diesel, kerosene and petrol).
"The T-64BV is motorized with a diesel liquid-cooled engine 5TDF developing 700 hp. at t 3,000 rpm coupled to a hydraulically assisted transmission with 7 forward and 1 reverse gear."
https://www.armyrecognition.com/russia_russian_army_tank_heavy_armoured_vehicles_u/t-64bv_main_battle_tank_data_sheet_specifications_information_description_pictures_video.html
You're right, sorry. Silly me missed the Z in front part.
Russia has some though.
Can be found as user in the link provided above.