The horizontal and vertical drive’s degree-per-second display is wrong for the base model of the T-90M.
It shows it much lower than it is supposed to be (Originally seen for myself at 39.6/DPS) but shows it as less. I ran it in the test drive, and it was much faster than 23 degrees per second, as having played unaced Challenger 2’s and Type 10s.
This screenshot is of the T-90M (Arena), where it is at a lower crew stat than the base model of the T-90M, and has a higher DPS than the base model (allegedly). In battle, the T-90M base model’s turret turns faster than the Arena, only because it is just the display that is rendered incorrect compared to the actual function.
Both vehicles have all modifications. Reinstalling one of the drives, unconditional on either one, will return the statcard back to normal, but this is still a bug, which I’d like to report.