Arnold Schwarzenegger and Sylvester Stallone battled over the level of fat and body counts in their films

In an upcoming joint TV interview titled 'TMZ Presents: Arnold and Sly: Rivals, Friends, Icons', the ageing muscle-bound Hollywood veterans admit they are still unsure who had the bigger career.

A preview of the chat shows Arnold sitting alongside Sly saying: "We ended up kind of like, 'Well, you killed 28 people in the movie; I killed 32.'"

Sylvester added: "I got to top that."

Arnie later said: "He killed 80 people, so I had to kill 87 people."

'Rambo' and 'Rocky' actor Sly added: "It was now the body count and then it was kind of, like, 'Well, what was your body fat?'"

"I was down to seven per cent."

Arnie added: "And then I said, 'I was down to 10 per cent.' So it became a competition with the body."

The 'Terminator' star and former governor of California admitted he got jealous of the weapons Sylvester used on camera, from his 'Rambo knife' to the sub-machine guns he wielded in the 'Rambo' franchise - and admitted he soon demanded automatic guns that were just as huge.

Arnie went on: "And then he started using machine guns that were kind of, like, huge machine guns. I was running after him, he was not running after me.'

"So I said, when we did 'Predator'... 'I've got to have a bugger machine gun than Sly used in 'Rambo'.

"So this is how it went."

Arnie and Sly have since become pals, enjoying a decades-long friendship since they were arch-rivals in the '80s.