<blockquote><font size="1" face="Verdana, Arial">quote:</font><hr> calypsoelise said: I'm trying to find out the link between the XJR-15 & BMW M1?<hr></blockquote>
The real answer is that there is no direct connection (to the best of my knowledge). The M1 was sold as a road car in order to make it eligible to race in Group 5 (where they require a certain number of road cars to be built before you can also race it). For various reasons, I won't get into, this never worked out for BMW at this time.
At this point, doing some quick research, I can't find anything about the Jaguar XJR15. But to the best of my knowledge the M1 project was always exclusive to BMW and never had a connection to any other company (other than Lamborghini who was to have been the assembler for the M1, before they ran into financial trouble).