it is a R32 because of the number
according to TTMG, numbers for the 32s are 3348, 3350-3658, and 3660-3949.
The number in the movie is a 3674.
One second thought, 81st Street Museum of Natural History is not a express station, its tiles are not yellow, and there are supposed to be animals on the wall, particularly dinosaurs and other stuff. The station looks more like 14th Street (A,C,E) in Manhattan or Kew Gardens Union Turnpike (E.F) in Queens.
The subway door sound is messed up.