Take your pic.
I'd disagree on the dating of the 156... I know I'm biased but I just don't find the original that pretty, whereas the Series 2 (aka facelift) looked fresh after 6yrs of ownership.Funny thing, but that facelift looks more dated than the original these days.
It's still clearly far better looking than the Carlton though, regardless of how interesting a car the latter might be. It's just a big slab of unstyled metal!