Finally, comic book "versus contests" is fairly dependent upon the writer. However, I'm fairly confident that Thor, as described in the comics, is much, much weaker than pretty much any god as described in every edition of D&D. For awhile, the gods in D&D did not have stats, as they could do anything they wanted and were fundamentally equivalent to the Beyonder in terms of Marvel comics.
I don't think the 1e AD&D Deities & Demigods Thor is all that vastly different from the Marvel version. I suppose you could argue that in Marvel Asgard only Odin is a Greater God, and Thor should have say 200 hp not 399. He certainly makes the grade as a 4e Epic PC, though, even if Odin is a 40th level Solo.