Are we talking comic book or cartoon Dinobots? Comic book dinos were weaker but smarter then their cartoon counterparts. Cartoon dinos were dumb as dirt, but tough enough to take on the entire decepticon army by themselves on more then one occasion.
Either way, Optimus Prime's strength was listed as being able to lift 2000 tons. Grimlock is considered to be either his equal or superior in this department. The other Dinobots aren't exactly weak either. In terms of strength Swoop is probably the only one who isn't stronger then base level hulk.
I'd put it like this:
Atlas: Can grow to be as big as Devastor, but that probably just means he gets to feel the full force of Grimlock's fist in his face before he comes crashing down.
Rage: Stepped on by Sludge.
Iron Man: He can outfly Swoop, but Swoop has bigger missles. Although if he's lucky he can take out Swoop's wings.
Namor: Stupidly faces off against the business end of Slag. "Hmmm, why me Slag smell fishsticks?"
Immortal Hercules and Wonder-Man: Do pretty well and hold their own, right up to the point where the Dinos remember they can transform into big robots with big freaking guns.
Savage Hulk: Hard to say. Early on, strength-wise, he's going to be no match. It'll probably take him a while to make it up to Grimlock's strength level. The longer he's in the fight the better his chances. On the other hand he's also probably the only one on the team who could relate to the Dinobots ("Hulk smash!" "Me Grimlock kick butt!"
, so if they start talking I say they wind up teaming up and beating on everyone.
