Compsognathus vs Tyrannosaurus Rex

A detailed side-by-side comparison of Compsognathus and Tyrannosaurus Rex, covering size, diet, classification, geologic period, and discovery history.

Side-by-Side Comparison

Property Compsognathus Tyrannosaurus Rex
Scientific Name Compsognathus longipes Tyrannosaurus rex
Classification Theropoda Tyrannosauridae
Period Jurassic Late Cretaceous Late
Diet Carnivore Carnivore
Length 1.0 m 12.3 m
Height 0.3 m 3.7 m
Weight 3 kg 8.4 t
Discovery Year 1859 1905
Discovery Location Riedenburg, Bavaria, Germany Montana, USA
Named By Johann A. Wagner Henry Fairfield Osborn

Size Comparison

Compsognathus 1.0 m

smaller than a human child

Tyrannosaurus Rex 12.3 m

about as long as 2 cars end-to-end

Weight Comparison

Compsognathus 3 kg

lighter than a human adult

Tyrannosaurus Rex 8.4 t

about the weight of 1.4 elephants

Timeline Comparison

Compsognathus
161.5 Mya Jurassic Late (Mesozoic) 145.0 Mya
Tyrannosaurus Rex
100.5 Mya Cretaceous Late (Mesozoic) 66.0 Mya

Diet Comparison

Compsognathus

Carnivore

Compsognathus was a meat-eating predator, hunting other animals for food.

Tyrannosaurus Rex

Carnivore

Tyrannosaurus Rex was a meat-eating predator, hunting other animals for food.

Classification Comparison

Compsognathus

Clade: Saurischia

Group: Theropoda

(Beast feet)

Tyrannosaurus Rex

Clade: Theropoda

Group: Tyrannosauridae

(Tyrant lizards)

Did You Know?

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Tyrannosaurus Rex was about 12.3x longer than Compsognathus.

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Tyrannosaurus Rex weighed roughly 2800x more than Compsognathus.

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Both Compsognathus and Tyrannosaurus Rex were carnivores.

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Compsognathus lived during the Jurassic Late while Tyrannosaurus Rex lived during the Cretaceous Late, separated by roughly 44 million years.

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Compsognathus was discovered 46 years earlier, in 1859.

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Compsognathus belonged to Theropoda while Tyrannosaurus Rex belonged to Tyrannosauridae.

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