Thor has his mighty Mjolnir and with it he can take down any being no matter how powerful. Surtur is big, but because of that it’s easy to attack him. He lacks the speed that Thor has. Thor’s power is beyond comprehension and he’d take down Surtur no sweat. Surtur will be back some day, but Thor has risen up the ranks in this battle. Thor wins.
DReager1.com 
Nah, Surtur steps on Thor. Done. http://i.imgur.com/i68OvEC.jpg
They should have put in the Tengan Gurren Lagann on that chart! Surtur is big, but he sure is slow and that makes a big difference!
I don’t think he’s that slow. He’s brought Odin to his knees so how would Thor win?
I read those comics back in the day and I was always a little skeptical. That being said, Thor is a lot faster than Odin if you ask me and he has more combat experience.