Torvosauras, specialized or genralized?

Even if they were specialized, that doesn't mean that they only take one species as prey.

Sea eagles are specialized fish eaters, yet they take small mammals and reptiles, as well as other bird species. Granted, fish make up a better part of its diet, but it's certainly not limited to fish.

Same goes for Torvosaurus, but its overall build suggests it was more generalized. 

About the bite force for a moment, Megalosaurs do have a high mechanical advantage over other theropod groups, High mechanical advantage alone doesn't translate to high absolute bite forces, the size of the jaw muscles themselves are important in determining that among other factors, for example, human jaws have higher mechanical advantage than any other living primate, higher too than in robust jawed extinct forms like Paranthropus boisei.

Also, there weren't really Hadrosaurs in the Jurassic, but instead Ornithopods like Iguanodon and Camptosaurus. Torvosaurus probably stuck to these, as well as small stegosaur species and if they roamed in packs( which we have no evidence of) they could very well take down sauropods. Babies are an easy target for lone individuals, no doubt.

I'm not entirely sure Torvosaurus had proportionally long legs;

A guess to how fast it could be would be ~18-20 mph, but that's just my guess and i really don't have any backing for it

I am sure they had a stobg bire in absolute and relative terms. But I takao think they could have hunted in packs. Sice but would be much more effective. And we didn't fine evidence for pack hunting because of there are so few fossils that were found.

It definetly was in the range of the bigger Carcharodontosaurs.

towards your statement on megalosaur pack hunting, yes and No. we haven't found evidence of megalosaurs pack hunting in general...The more complete ones (Dubreillosaurus and Eustreptospondylus have been found solo, and that's multiple indvidiauls from both species. In all honesty, Torvo didn't need to hunt in packs because it had its size, along with a massive set of jaws.

dont forget it had powerful arms. btw t.rex and charcardontosaurus possibly hunted in packs , so why wouldnt torvo?

Carcharodontosaurus is an inference made from a bigger inference that Giganotosaurus hunted Argentinosaurus(not even contemporaries) in packs...but, we have evidence Mapusaurus hunted in packs are ten individuals were found in one place, killed at one time. They range from individuals of about 18 ft in length, to a very massive individual 45 feet in length. Pack behavior in carnivorous dinosaurs was something that was overlooked for decades, and only in the last 20 years or so did that fact begin to change. 

Tyrannosaurus probably hunted in family units, if anything. More individuals participating in a hunt = a better chance for success, so it's plausible. Same goes for Torvo, we just have evidence for the former or latter

i wonder how those mapus died.

TK probably a flood, or maybe some form of other natural disaster.

also, it's possible Torvo hunted in packs but, I'm not sure if it'd need to. Think about it, Torvosaurus is probably the biggest jurassic carnivore except for maybe Saurophaganax. So why would Torvosaurus need to hunt in packs? It didn't really have the design for sauropod hunting and there the only animals that a Torvosaurus would need a pack to hunt.