A 9-ton dinosaur with history's strongest bite vs a 500-pound cat. Not competitive.
The T-Rex outweighs the lion by roughly 36:1 and has the strongest bite force of any land animal in Earth's history (12,800 PSI). The lion's claws can't penetrate T-Rex hide, and the dinosaur's jaws could swallow the lion whole.
This is one of the most extreme size mismatches in our database. The lion is an apex predator in its own ecosystem, but the T-Rex was the apex predator of an ecosystem where everything was bigger.
The lion is faster and more agile. But speed doesn't help when the opponent can kill you in one bite and you can't hurt it back.
36:1 weight advantage. 12,800 PSI bite force. The T-Rex doesn't even notice the lion's claws.
The T-Rex wins without trying. The size gap is so extreme that this matchup is essentially academic.
African Lion also fights
Tyrannosaurus Rex also fights