



With a weapon, well depends. If he has a handgun he still loses but is he has a shotgun he will win.

The T-800 with no weapons will be chopped in half. He has a lot of intelligence and has a decent level of strenght but he will get bite sooner o later, the only way that he can win is if he can damage the T Rex´s legs and then attack the eyes, but if he get stomp he will be very damaged.