I thought the 2 door coupe was a 2 door sedan. That's what we've been calling them on the forum.
Well, technically it is, (considering it's classed by the pillar config, and body style) but originally a coupe was considered a two door car with two windows, and 2 or 4 seats.
So since the opera window is mounted in the C pillar, I don't really consider it a true window (like a proper side window), so I still call them a coupe. I'm sure either side of this opinion could be argued at length.
I've always found that confusing that any 2 door car with a trunk could be called a sedan. Personally, it's just wrong, but to each his own.
Anyways, isn't it shorter to say (or type) "coupe" then it is to say, "2 door sedan" ?