
I've observed most vehicles from the mid-70s and older seem to be considered classics regardless if they were a sports car or an everyday commuter (i.e. base model 1950s Chevrolet ultility sedan). It seems after the Malaise era in the late '70s, vehicles need to have something special about them to reach classic status. Fox-bodies Mustangs are fairly well beloved, for example (At least in North America), but Tempos have mostly been forgotten with few survivors despite high production numbers.
We see a lot of '50s Shoebox Chevys because there was always some culture and demand from the beginning so many people hung onto and saved many examples. We now look at something like a Ford Tempo and say, "Oh shit, I totally forgot those existed. Crap, looks like we scrapped the majority of them."
by HiTork