Just stumbled across this video this afternoon and I thought it would be of interest to others here.
I know it is a X300 car but since the AJ6 and AJ16 engines are so similar I thought I would cross post it here.
Unfortunately there is no information about the mods to the car but in the last half of the video you can hear the sweet song of the supercharged engine at full chat on the dyno.
BTW, this is NOT a standard XJR car. This seems to be a heavily modified track vehicle.