It's relatively well documented the T-34 tank uses a V arrangement engine in all variants.
I found this CIA document that was declassified:
https://www.cia.gov/library/readingroom/docs/CIA-RDP82-00457R008300010007-6.pdf
It is difficult to read but it states
Piston Stroke 180mm left block
186.7mm right block
Does the engine of the T-34 have different stroke between the left and right bank? So the pistons of one bank would have less displacement than the other one?