Assuming we are talking about the black R75V8 in Ealing, then those "seriously interested individuals" also posted their views on the MG Rover 260 V8 Owners and Enthusiasts FB group, so if I were to say anything, it would only be reported speech. One of those I can say, was Julian Anderson, so if you search around for comments posted there, you may get more information from the "horse's mouth" as it were.
It would be unfair of me to say more, not having personally seen the car.
David