The t-34 tank used the Kharkiv model v-2 engine, which apparently did indeed have different strokes for the cylinder banks, at least according to Wikipedia
Displacement 38.8 L (2,367.7 cu in), bore 150 mm (5.9 in), stroke 180 mm (7.1 in) left cylinder group and 186 mm (7.3 in) right cylinder group, torque 220 kgf⋅m (2,157.5 N⋅m; 1,591.3 lbf⋅ft).
According to some forum posts on the world of tracks forums
Same thing goes with many soviet build engines, for example T-54/55 have basically the same engine. That odd stroke is because the pistons are linked to the central crank shaft by wrist connecting rods, which means that only six rods are directly connected to the crank shaft. This special design also results in a slightly lower stroke in both sides of the engine