I was watching "The North Avenue Irregulars," and I got asked what that sporty-looking white car was, and I guessed it was an AMC, but I wasn't sure.
Figured I'd never know.
However, light Googling turned up the Internet Movie Car Database, which solved my problem (it was a '73 Hornet)
I don't know how deep they go, but you can try typing a movie name in the Search Box on their home page. Let me know what you find.