Arnold Schwarzenegger and Sly Stallone have a rivalry over body fat, machine guns and more

The two action stars once had a rivalry in the '80s.

The famed '80s action heroes sat down to discuss their careers for the Fox special 'TMZ Presents: Arnold & Sly: Rivals, Friends, Icons'

Arnold Schwarzenegger ragged on his former rival-turned-friend Sylvester Stallone for his unique fashion choice that he compared to a diaper.

Arnold Schwarzenegger and Sylvester Stallone unpack intense rivalry over body fat, machine guns and more. Schwarzenegger and Stallone compare everything from body fat to machine guns. Schwarzenegger, Stallone still unsure who had the bigger career, comparing everything from machine guns to body fat.

Arnold Schwarzenegger tricked Sylvester Stallone into doing flop movie during peak rivalry. Schwarzenegger predicted the movie he predicted would flop during his rivalry with Stallone. Schwarzenegger and his agent tricked Stallone and agent into taking the movie. Schwarzenegger said he predicted the film would be a flop at the height of the rivalry.

Golden Globe winners competed for everything including the best scripts, the best body, the biggest guns, the most kills per movie. In their eighties/nineties heyday, the Golden Globes were competing for everything from the best script to best body and the best kills per film.