I've driven many V8s over the years and the Monaro wasn't what you would call memorable even at full chatter.
This is turning into one of those twisting discussions where you don't address what has been said before and simply add new routes of discussion to move away from addressing something else that had previously been said.
The discussion was "interesting cars" the Monaro was interesting in the context of something Vauxhall did in the past but wasn't really new or particularly exciting, neither are any of their VXR cars, they are all standard cars with some extra BHP squeezed in.
The W8/12/16 line of engines was a genuinely new technology and has lead to the most powerful production road car in the world. So their are quite humble beginnings in that Passat.
I'm not sure why you are obsessed with weight, weight in a road car does not automatically relate to poor handling, there are some very heavy cars that handle very well and some little light cars that handle very badly.
A lot of the big Audis with big engines and 4wd handle very well. Many heavy front engined rwd cars don't handle well with all that weight over the front and no weight on the back.
Seems like any mention of a VW results is an automatic need to put it down, which really is not going to work if the best you can come up with is some boring old Vauxhall's. there are dozens of cars you could have put forward, but no Vauxhall built in the last 15-20 years is innovative or interesting in anyway, even the Monaro which follows the same format as cars made in the 1960s - 1970s it's just a more modern day pony car wrapped up in a really boring looking body.