Could my dad have beaten up a naked Arnold Schwarzenegger in the 80s?

My dad’s from Nigeria, when the country was run by a dictator most males were made to weight train from a very young age, my dad is 6ft3 and was 250 pounds of muscle mass at age 20. He was also very aggressive and had a bad temper. <br><br>Arnold Schwarzenegger is a well known Austrian body builder of German descent, he’s just 6ft2 and weighs around 235-240. He’s known for being polite and gentle. <br><br>Assuming the fight is at a boxing arena with a crowd and both parties are unaware of who the opponent is, which person would win?