Looking at the Big Four

First off, I want to state, that this is my OPNION, so if you don't agree that's fine, just don't start anything, if you don't agree with me. If something does start I will not hesitate to ask RexFan or MrHappy to lock the topic.

Now that's over with lets get started.

First on our list is Tyrannosaurus Rex, by far the most famous dinosaur. Ever since we discovered Tyrannosaurus rex, it has been known as the most famous dinosaur.

Unlike most other large theropods, we have numerous specimens. First lets looks at some of the specimens and there sizes.

Sue: Probably the most famous Tyrannosaurus, Sue was a remarkable find. She was one of if not the largest specimen we have. As well as the most complete at about 80-85 percent. Originally estimated at 12.8 meters, she has since been downsized to about 12.3 meters, or about 41 feet.

AMNH: this is a relatively well known Tyrannosaurus to dinosaur fans. It messures about 11.8 meters or 38 feet.

While there are still many other specimens I will be skipping to the possible giants.

C.Rex: this Tyrannosaur has been a subject of mystery ever since it was found. With a skull 10 cm longer then that of Sue, it seems like a true giant. Whether it is or not is up for debate. The reasons for this are. Skulls of theropods seem too vary, which means a Tyrannosaur could have a skull longer then another Tyrannosaur but, the total body length could be the same.

UCMP: This Tyrannosaur is also up for debate with a pedal phalanx, larger than that of Sue. While it is possible that pedal phalanx, was infected making it larger then is was ment to be, assuming it was a healthy adult it was most likely larger then Sue. That does not mean that it was a 50 foot giant though. Lets also not forget Tyrannosaurus show osteogenetic changes. Now let's assume it was a 50 foot giant, there would far more cons then pros to this. Such as finding enough food, a 50 foot tyrannosaurus would certenly need a massive amount of food. Also it's possible it would simply be to heavy for its body to support.

Now, let's look at the prey of Tyrannosaurus Rex.

There were a varity of possible prey for a Tyrannosaurus. Such as Edmontosaurus, Corythosaurus, Triceratops, Ankylosaurus, Ornithomimus and Almosaurus. Tyrannosaurus Rex, was not the only predator in the environment there was also, Nanotyrannus and Dromeosaurus but, based on their size, they would be little competition to a Tyrannosaurus.

Based on its tooth design it most likely didn't hunt Almosaurus. And wasn't exactly bulit for speed like Ornithomimus was. The rest of the animals were all possible prey for Tyrannosaurus. It most likely favoured Edmontosaurus or Corythosaurus Based on the fact that they couldn't put up as much of a fight as an Ankylosaurus or Triceratops.

Build

Tyrannosaurs for the most part were heavily bulit, Tyrannosaurus and Daspletosaurus are by far the most robust. Tyrannosaurus most powerfully bulit parts were, it's neck and jaws. For good reason to, it would struggle to kill a Ankylosaurus or even an Triceratops with out powerful jaws. It's teeth are commonly called rail road spikes, as they thick blunt and have serrations going down the sides.

To finish off Tyrannosaurus Rexs section, I will puting my size estimates.

Average: 39-41 feet long and 7-8 tons

Max confirmed: 42-43 feet long and 8-9.5 tons

Max estimated size: 44-45 feet long and 10-10.5 tons

Next up is..

Giganotosaurus Ever since discovered, Giganotosaurus has been up for debate! Unlike Tyrannosaurus we only have 3 specimens one of which is not even fully described.

MUCP-Ch1: This is the first specimen discovered, at about 42 feet long, it's a large animal. It was about 70% complete. It was about 7 tons.

MUCPv-95: this is the second Giganotosaurus discovered, it consist of a lower jaw fragment 8% bigger then the original specimens. Like C.rex it doesn't confirm a larger individual. Like C.rex I'll take this induvidual into consideration for size.

The Unanmed specimen: not much is known about this specimen, it was locked in combat with a ekrixinatosaurus, presumably it won based on the fact that the ekrixinatosaurus skull was shattered. It's hard to give a size on this specimen, because it's not fully described. It seems to be anywhere in the 45-50 foot range.

Prey

Their was a big amount of prey for Giganotosaurus. Most of which were sauropods. The herbivores that lived in Giganotosaurus environment were... Andesaurus, Saltosaurus, Limaysaurus, Nopcsaspondylus, there is also Ingunodont remains and ornithischian remains. All of these seem to be possible prey for a Giganotosaurus as none got much more then 20 tons and none were to fast. But, the life of a Giganotosaurus was not easy it had plenty of competition, it had the 35 foot long ekrixinatosaurus, and the 44 foot long Oxalaia and the massive crocodilian Sarchosuchus to deal with.

Bulid

Giganotosaurus were mediumly bulit theropods. They were fast animals not heavy weights but, not light weights ether. It seems there body's were very generalized meaning no part of their body's seemed overly bulit compared to the rest of the body.

Now for the size

Average: to little specimens to tell

Max confirmed size: 43-44 feet long and 7-8.5 tons

Max estimated size: 45-48 feet long and 9 tons

Next up is.. Carcharadontosaurus (this section will be short as it is such a fragmentary dinosaur)This like Giganotosaurus also has been a source for debate.

Specimens: as far as I know, known of the Carcharadontosaurus specimens were named, as I couldn't find anything about them anywhere.

Prey

There was a large amount of possible prey for a Carcharadontosaurus. There was Pralititan a massive sauropod, agyptasarus another large sauropod, and Ouranosaurus a large Ingunodont. All of these were possible prey for Carcharadontosaurus. But, like Giganotosaurus had plenty of competition. There was Spinosaurus and Sarchosuchus and possibly a large unnamed abelisaur to worry about.

Build

Carcharadontosaurus like Giganotosaurus was a mediumly bulit theropod but appears to be, more slender then Giganotosaurus.

Size

Average: to little specimens to tell.

Max confirmed size: 42 feet long 6.5-7.5 tons

Max estimated size: 44-45 feet long 8-8.5 tons

Now... The final animal on this list.

Spinosaurus Like the previous two animals, Spinosaurus is a huge sorce of debate.

Specimens: The original Spinosaurus specimen was the most well pressured and probably the biggest discovered, unfornutly it was destroyed by the Allies. The specimen included some of the neural spines, the tallest was 5.4 feet tall, contrary to popular belief it also contained part of an upper jaw. Since then we have only found neural spines, and jaw fragments.

Prey Spinosaurus was a Piscovre feeding manly off of fish such as onchopristis. Some may say that Spinosaurus hunted more then just fish, which while possible it would have definetly been a last resort. Here's why, first of all the only known dinosaur in the area that a Spinosaurus could possibly kill is Ouranosaurus, which would be difficult because of its speed and that Spinosaurus wasn't ment to take on other dinosaurs. It's jaws May have been strong but, it doesn't matter, all of the pressure comes from the jaw muscles but, because of Spinosaurus thin elongated jaws, the muscles wouldn't reach the opening of a Spinosaurus jaws, that being the area were the bite would come from. Not only that it's teeth were conical, they didn't have serrations in them.

Arms (thought it would be a important topic to cover) Like Spinosaurus itself this is up for debate. Spinosaurus arms are one of its great secrets, some say they were 8 feet long with 3 foot meat hooks at the end. It's hard to tell what's true for all we know it had no arms but, it most likely did have them. As for the size I ussualy estimate at about 6 feet long and claws from anywhere from 1 foot long to 2 foot long talons.

Build

Spinosaurs in general were lightly bulit animals, not pushovers but, not strong for their size. Spinosaurus seem to have more robust arms then anything eles so it's fair to say that Spinosaurus did as well.

Size

Average:To little remains to tell

Max confirmed size: 50 feet long and 6 tons (based on Nat Geos estimates)

Max estimated weight: 55 feet long and 7-7.5 tons

Final conclusions

Heaviest theropods

1. Tyrannosaurus Rex

2. Giganotosaurus

3. Carcharadontosaurus

4. Spinosaurus

Longest Theropods

1. Spinosaurus

2. Giganotosaurus

3. Carcharadontosaurus

4. Tyrannousaurus Rex

Tallest theropods

To little evidence to tell

Strongest bite forces

1. Tyrannosaurus Rex

2. Most likely Giganotosarus based on that it seems overall more robust in general then Carcharadontosaurus

3. Carcharadontosaurus

4. Spinosaurus

These are my opnions, I don't care if you agree or disagree, don't bother commenting if your going to start trouble. If you do I will not hesitate to ask RexFan or MrHappy to lock this topic.