Size comparisons

[AndresVida]

How on earth is Giganotosaurus holotype heavier than Tyrannosaurus (Sue) ? I'd give it max of the same size but heavier…
If you consider the alleged max sized giganotosaurus against Sue the tyrannosaurus yes you are perfectly right, but baised on complete and reliable speciments its impossible.

The bone structure of the giganotosaurus is too light compared to the stocky pitbull-like bone density of tyrannosaurus.
I mean I have visited many sites and from what i heard giganotosaurus carolinii holotype can max reach 8000+ kgs or 9 metric tons which rivals Sue but never overweights it.
On the other hand, the giganotosaurus holotype is bigger than all other tyrannosaurus speciments, there is only the exception of Sue and maybe Scotty. 

The largest giganotosaurus carolinii ever found is 12.25 / 12.45 meters long. I am never considering a speculative size of a dinosaur we only have a jaw fragment of. Those are only speculations, how can you know it was 13.2 meters? Could have been more, could have been less.
(but hey I am not saying that these alleged giganotosaurus speciments aren't larger than Sue, they ARE, it's just that it's really hard to determine an accurate body length and size of them, is it?)

I only take as proof for size comparison the most complete speciments and for this reason I don't even consider the alleged tyrannosaurus specimens supposed to be "larger" than sue since all those sizes are not confirmed but speculated. But it's only my personal take, not going to judge others.

Charcarodontosaurus is highly controversial imo, we only have skulls and some bones of them so I guess that estimating a size would be too hard. We don't know the body proportions of it and we can't compare them to a giganotosaurus since they are different, what if charcarodontosaurus had a shorter tail related to its body size? We can never know until we find a real skeleton. That's the reason why I never consider charcha in size comparisons. But still it's only my personal opinion. 


About giganotosaurus holotype, it can max rival Sue's size, but never exceed it. Sue is even longer and about 20 cms taller at thenhip and note that Sue's tail is not it even complete.
Compared to each other, they are this big

*This image is copyright of its original author

*This image is copyright of its original author

Sue is indeed bigger, but as you said, giga is not only 6800+ kgs, it is more and as I said it rivals Sue.
For more infos see this

Matt Dale Conrad's answer to Giganotosaurus vs T. rex, who is the deadliest predator? (Matt Dale Conrad's answer to Giganotosaurus vs T. rex, who is the deadliest predator?)
Nelson Bass-Howell's share of Nelson Bass-Howell's answer to What is the heaviest theropod? in Ancient Life (Nelson Bass-Howell's share of Nelson Bass-Howell's answer to What is the heaviest theropod? in Ancient Life)

NOTE : CONSIDER THAT THEY USE THE WRONG WEIGHT FOR GIGA, I just wanted to give you the size comparison of the skeletons with Sue being bigger but similar in mass

And how are heights not reliable? I am talking about hip heights not head heights, there's nothing you can change from hip height, it's like the shoulder height for modern predators
Sue hip height : 3.73 meters
Giganotosaurus holotype hip height : 3.53 meters
Tyrannosaurus holotype hip height : 3.67 meters

Here holotype Tyrannosaurus, taller than giganotosaurus ( 3.53 vs 3.67) but lighter and shorter in length ( 11.8 meters vs 12.25/45 meters) 

*This image is copyright of its original author

But about weight you are right, 6980+ kg for giganotosaurus is too low but i don't believe it could go far from 8000 kg. Yes, it rivals sue in size but keep in mind that giganotosaurus was way more agile and faster than Tyrannosaurus, the longer tail probably worked as a cheetah's tail works today.
So, faster = less body mass. Tyrannosaurus on the other hand wasn't built to be agile or fast, it wasn't as agile as giga so probably that's why it looks like it has a much more muscle and bone density than giga. Wasn't Tyrannosaurus the scavenger? 

So my conclusions :

The largest reliable tyrannosaurus (sue) is slightly bigger than the largest giganotosaurus carolinii ever found by mass, height and length.

Giganotosaurus holotype however is not that small, it rivals sue in size and weight. (Sue may be heavier by only 300–500 kgs)

Can giganotosaurus be bigger than Tyrannosaurus? Yes absolutely , the alleged incomplete specimens you cite even though size and weight aren't reliable are indeed bigger than Sue, by both body lass, length and probably hip height.

But talking about largest complete speciments, Tyrannosaurus is slightly bigger than giganotosaurus.

See this from Scott Hartman 
https://images.app.goo.gl/PbhUVUekaTuVe5FA8


But the largest giganotosaurus that could reach 9–11 tons are larger than Sue.

I know Ibrahim’s studies of Spinosaurus and those are completely reliable innmy opinion, since spinosaurus was an aquatic reptile it probably weighed more than Tyrannosaurus since water cancels gravity. No wonder why most marine animals weigh that much, such as hippos, whales and killer whales. Adapted to live in water without gravity they grow with bigger mass, that's why spinosaurus was probably heavier than Tyrannosaurus I heard that there was a limit of 13 tons for spinosaurus wasn't there?

*This image is copyright of its original author

Yes, with these studies a spinosaurus is indeed much heavier than Sue do you think that the max can be up to 13 tons? It's damn interesting that spino is changing in years.

I am happy to see someone interested in dinosaurs as me, most of people talk about big cats and bears on here so I am happy that there's someone as interested as me ? I hope to have a nice conversation with you Reply