Glad to see we are on the same page regarding the 6R4! So many people slate it because they say it is "ugly" (the Quattro S1 E2 was no oil painting, but nobody seems to care). Consider yourself the recipient of a "like" (my system and browser are so ancient that certain blog functionalities are missing).
How the XJ220 ended up with the 6R4 engine... well, maybe fitting a V12 and four-wheel drive, as originally planned (and promised) would be a very tall order anyway, but given the fact that Walkinshaw was in charge of turning the project into a real car... who knows.
The fact that at the same time he was developing the XJR15 (without bothering to tell Jaguar) is quite telling.
First, a virtual *like" (see above for an explanation)! Particularly because I have always admired the first sketches and mockups for the 959. They looked fabulous (if a little too much 911-looking)
Regarding the Carrera GT, I was thinking of the differences between the show ("concept") car and the actual production version, same as you did with the Gruppe B Studie. Maybe they are so subtle they wouldn't show? I hadn't thought of that, but the production design team said later that not a single line is actually the same (but then that's what always happens in the transition between a design study and the real thing)
Cheers and thanks to you two.
(Just had a rather warped idea: a KdF>935/78, aka Moby Dick?. Arguably the ultimate Beetle.)