The Main Carnivore for The Land Before Time XV

Carnotaurus - 7.5 m - 2 ton - L. Jurrasic
This animal had a similar body size to Allosaurus but a much shorter tail, hence its deceptive size when the lengths of the two animals are given. In this case, comparison of body-weights gives a better idea of their relationship.
The Main Carnivores for The Land Before Time XVI

Acrocanthosaurus - 12 m 4 ton - E. Cret
This animal was an Allosaur and, as such, had the long tail associated with them. However, it was notable for its spines along its back.

Carcharodontosaurus 13.5 m - 7.5 ton - E. & L. Cret
The slightly smaller African cousin of Giganotosaurus. Smaller versions were known for decades but a recent skull 5' 4" in length had created a new estimation for the size of this animal.
The Main Carnivore for The Land Before Time XVII

Torvosaurus - 12 m - 3.5 ton
Another of the longest animals ever discovered. It has a more slender body than Tyrannosaurus. Torvosaurus is a close relative of Megalosaurus, which is a couple of metres shorter. The two share certain charcateristics of the hip bones.
The Main Carnivore for The Land Before Time XVIII

Tyrannotitan ?14 m - ?7.5 ton - Cret
This is a newly discovered dinosaur about which little is known. Size estimates range from 13.7m to 15.2m so it could yet be the largest known carnivore of all time. It is of the Carcharodontosauridae family also.
The Main Carnivore for The Land Before Time XIX

Spinosaurus - 15 m 4 ton - L. Cret
Another example of a false impression of size. Like Allosaurus its huge tail accounts for more than 50% of its body length. Also, its magnificent sail adds nearly 2 metres to its height.
The Second Main Carnivores for The Land Before Time XX

Mapusaurus 12.5 m - 5 ton - L. Cret
A dinosaur from Argentina which is part of the Charcharodontosauridae family however it is a close relative of Giganotosaurus rather than Charcharadontosaurus itself.
The Main Carnivore for The Land Before Time XX

Giganotosaurus - 14 m - 8 ton
The new champion. Skeletons are incomplete and the estimates of the size might still fluctuate, but it does seem larger than T rex and its related Charcharodontosauridae, with the possible exception of Tyrannotitan.