I think it’s an XM Falcon
So I did a bit of a google and judging by the tail lights and the shape of the side of the body it’s an XK or XL. From XM onwards the bodywork around the tail lights sticks out. Bit more research and it’s more likely an XK because the XL has a wider C-pillar.
See here: http://www.xfalcon.com/forums/index.php?/topic/14281-xm-coupe/
scroll down to post 15.