Factual error: When Charles Bronson is making a telephone call on a pay phone, a 1971 or like vintage Mustang is parked within view...out of place for the time the film is supposed to take place. There are other similar auto related mistakes, mixing thirties cars with late models in traffic scenes.
Factual error: At the conclusion of a car chase, in the beginning of the movie, one of the cars is shown going into the river, with the New York skyline in the background. Most prominent are the Twin Towers of the World Trade Center. Since the chase took place in the 20's, theres no way the Towers should have been there.