The T-34-85 is a variant of the T-34 tank. Given that most posts with the T-34-85 were manually tagged with both the base T-34 and T-34-85, I think the tag should be implicated accordingly.
I think it should be aliased into the main T-34 tag, despite I thought such over-specific tag should've been nuked instead. We do not even necessarily tag all the existing specific T-34 variants. In context of illustrations, the difference between T-34 variants left ignored and too trivial to be recognized by most people. They just call all of them as the T-34. Many artists struggle on rendering anatomy correctly, including vehicles and weapons. While I consider the exceptionally distinct SU- variants should stay.
Anyways, there's even redundantT-34-76 with total of 2 posts. It's just the original 1940-produced variant as shown on the linked image.