An XJ-S or an XJS ?
The 4.0 is better IMHO, and has a manual option (rare).
The Rover was a timewarp - they need to be preserved no matter what model. I found an old test of the 820 (no i/e) - wow what a really carp car, slower and thirstier and less goodies.
I'd rather have a Rover 2000 SD1 please.