I thought there had been at least two volvos since that 'liftback' thing that followed the same concept - the volvo 480 'coupe' or 'liftback' similar in appearance and the current C30, which although not quite a 'liftback' has undertones of both the 480 and the 1800ES....
Or was it somthing else that volvo never tried again?
The 1800ES is just the "station wagon" version of the 1800 coupe (like Roger Moore used to drive on
The Saint TV series).
I kinda like 'em- a friend of mine owned one of each, and when the coupe got creamed at a traffic light (idiot in a SUV on his phone), we pulled the engine and trans out of the coupe and put it in the ES (which had a tired engine and leaky auto trans).
They look classy and last forever if well-cared for, but I find the ergonomics a little awkward... the wheel seems to be right in my face.
And it's not exactly a high-performance sports car: drives like, well, like a Volvo.

PS- good ol' Land Rover- you can roll 'em over like that and they don't mind at all. ;)