Just picked this up over the weekend and got a chance to ride it today.
As far as I can tell it is an 86 Centurion Elite RS and it rode great! I put some air in the tires and went on my lunch time 10 mile loop and didn't have any issues. The previous owner took good care of his bikes it seems as everything seemed to be in good working order. I am not sure if it was actually quicker than the Ross, but it certainly felt that way.
The Centurion did feel more squirrely in the front end, but not in a bad way. It's just that greater trail on the Ross made it track straight ahead and require more effort to turn. One thing about the Centurion is that I was able to ride hands free. Something that my Haro MTB nor the Ross would do.
The Centurion was a nice upgrade from this:
Ross Professional with full Shimano 600 group set