Quote Originally Posted by Dr Terry View Post
Yes, I use the 'superseded' to mean that the newer motor (186S) replaced the older motor (186 X2). My dictionary definition of 'supersede' is to "take place of" or "supplant". It's like saying that the HJ series superseded the HQ series.

In other words, the X2 was dropped when the S was introduced.

Also, in the engine table I gave the engine number of the last 186 X2 & the first 186S.

Dr Terry
So they dropped the X2. X2 wasn't just the engine after all. It was a package of various other bits. It wasn't replaced by the 186S. The X2 engine ceased to exist along with the X2 car,not superseded. If you are not a HR nut it's hard to follow.