Certain 210 models have a rudder-aileron interconnect. It may be just the first time you were in one that had the interconnect working.

As stated above, the controls are interconnected to help with adverse yaw. It is a design feature some like and other hate. I have flown a C210 with the interconnection and did notice the “auto rudder” when I banked, but the level of interconnection was weak, so it did not make me feel like I had no control of the rudder. The one thing you should remember is that it can affect your ability to slip or do the wing low maneuver for landing. I am not too familiar with the interconnection in the C210, but I do not believe it is the advanced type that lets you add full opposite rudder.