Guys, you are underrating Thor level of strenght even in the JLA VS AVENGERS crossover and before he got the Odin's Power.
He has show several feats of great strenght, and resistance too, he has substained the entire Brooklin bridge, lift the Midgard Serpent, if Thor keeps the hammer in his belt and starts to fight fist to fist, he can defeat the Hulk before Hulk reach is level of strenght, remember that Hulk is class 70strenght when he's quiet, reach 100 with the starting rage, and when he goes mad he surpass class 100 strenght, which Thor is in, he can lift excess of 100tons, it's not calculable is exactly strenght but it's great, without the hammer he will be weakened but he wouldn't go under excess of class 100strenght.The fight in JLA VS AVENGERS was not good, of course nice to see, but two powerhouses like Supes and the Odin's son need about 10pages to show their real power level, but they close the fight after a few punches, 1shot of heat vision, and Thor didn't use his god-force blast.About Thor's speed, don't you remember that he has superhuman reflexes and reaction time, as a level of superspeed that is not clear but probably not too much under that of supes, at max the half of that of supes.About Thor flying without Mjolnir, i've see that only when he was the owner of the Odin's Power, but without i've never see it.
Clarifications about King Thor:
He starts to rule the Earth after mortals attack the copy of Asgard that stands in the sky over NY City, and he starts to register all the born childrens with superpowers, to prevent terrorist attacks to him or New Asgard, a city born from the Ashes of NY and Asgard.In one issue is show the battle between Thor and the last heroes:
Captain America, Wolverine, Doctor Strange, Hulk, The Thing, there were also Warbird and Quicksilver captured by Loki, who were in possess the Doctor Strange's cape and the Eye of Agamotto, so he was a strong opponent, anyway Doctor Strange reach the nursery where Thor was with the Encantress and their son Magni, Wolverine crush through the door, cutting away Thor's left arm and eye, then he were destroyed by an eyeblast of Odin's Power, during that Doc Strange put a medallion on Thor's neck, drammatically reducing his powers, Thor says that no mortal can do something like that, and Strange answer that the Council of Earth Pantheons can.The Thing and Hulk arrives in the nursery, and Benji says: Houdini have done the job(i've translate it from my italian comics so excuse me if the spelling isn't exactly), prepare guys, IT'S CLOBBERIN TIME.Benji and Hulk charges Thor and leap from the royal palace down into the streets, after a fight that durate hours(sayed from Thor), we can see Thor with a foot on The Thing's chest, and Hulk stabbed with a piece of rock into the chest, they're both dead.Thor had lose is left arm and eye totally during the fight.At this point, arrives the shield of Cap that hit golden hair head, Cap starts a combo of his better hits, and when is goind to cut off thor's head, saying that he will pay every price for a free world, Loki remove the medallion from Thor after killing Balder who was going to murder Magni if Thor doesn't stop to resist.Withtout the medallion, Thor catch Cap's neck, lift him and destroy the shield and Cap with another Odin's Power eyeblast.A little tear comes from my eyes when i read this Thor issue, it was great.