What most people think of as a Dart ( mid '60s on up) was a compact. Earlier Darts were much larger:
The first generation were full sized cars (209" long, '60-'61). Next came the short-lived 1962, which I’d call an intermediate (we had one). From '63-'76 they were “compacts”, but at 196" that’s ‘full sized’ by today’s standards.
My '72 Duster with the slant six was very sturdy and reliable, if a bit slow. Too bad it got totaled after I sold it to a friend…