http://www.imdb.com/title/tt0076095/
Very surprised not to see this one listed yet, it having won Richard Dreyfus an Oscar. There must be hundreds of cars in this one (the movie was filmed on location in New York), the vast majority of which are too small, too blurry or too obscured. But I did find a number of them to include here.
Pontiac Catalina, one star
guessing...Dodge Monaco? two stars
Dodge station wagon, one star
Buick, one star
1964 Cadillac, one star
Ford Maverick, one star
Mercury Capri, one star
Ford Pinto wagon, one star
Ford Thunderbird, one star
Oldsmobile (Cutlass?), one star
1964 Buick Skylark, three stars
1974 Imperial, two stars
1969 Pontiac Firebird, one star
1971 Ford (LTD or Galaxie?), one star
I'm assuming all of the cars in the auto show scene are 1977 vintage.
1977 Honda Civic, one star
1977 Subaru, one star
1977 Volkswagen station wagon, one star
1977 Subaru (DL?) wagon 4wd, three stars (Marsha Mason's character is describing it at an auto show)
another Subaru wagon, one star
1964? Oldsmobile (Cutlass or F-85?), one star
Oldsmobile Cutlass (right), one star
unknown bus (GMC?), one star
Checker Marathon, two stars