* The film is set in the 1920s, while the novel is set in the 1910s. This change was made in order to take advantage of the increasing popularity of the Jazz Age at the time the film was made.
* The film focuses more on the romance between Jay Gatsby and Daisy Buchanan than the novel does. This is likely due to the fact that Hollywood films at the time typically placed a strong emphasis on romance.
* The film omits several important characters from the novel, including Meyer Wolfshiem and Klipspringer. This was done in order to shorten the length of the film and make it more accessible to a wider audience.
* The film makes several changes to the plot of the novel. For example, in the film, Myrtle Wilson is killed by Gatsby while she is trying to run away with Tom Buchanan, whereas in the novel she is killed by Daisy Buchanan while driving Gatsby's car.
* The film has a different ending than the novel. In the film, Gatsby is killed by George Wilson, while in the novel he is shot by George Wilson but survives.
Despite these differences, the 1974 film adaptation of The Great Gatsby is a faithful and well-made adaptation of the novel. It captures the spirit of the novel and brings its characters to life in a way that is both entertaining and thought-provoking.