If I can find time, I'd try, but I think in TRO:1945 time, the average tank would look like:
Size 1 (2 for late models), movement 6"t, attack 0*/0*/0*, armour 1 internal structure 2, EE & SRCH.
Maybe a Tiger might get to 0*/1/1, and 2 or 3 armour, at size 2.