I learned something today, just now, talking to a buddy of mine who is also an enthusiast and multiple Jag owner.

Within Jaguar, the car codes were many and varied.

Just for the XK8/R
1996-1998 is the x100.
1999-2000 is the x101.
2001-2002 is the x102
2003-2006 models were known as x103

 

Here is a document that might interest you. We got these TechLines every month for a while when I worked at the dealer.

Here is Feb 2005

bob