Allosaurus vs Brachiosaurus
A detailed side-by-side comparison of Allosaurus and Brachiosaurus, covering size, diet, classification, geologic period, and discovery history.
Side-by-Side Comparison
| Property | Allosaurus | Brachiosaurus |
|---|---|---|
| Scientific Name | Allosaurus fragilis | Brachiosaurus altithorax |
| Classification | Theropoda | Sauropoda |
| Period | Jurassic Late | Jurassic Late |
| Diet | Carnivore | Herbivore |
| Length | 9.7 m | 26.0 m |
| Height | 3.5 m | 13.0 m |
| Weight | 2.3 t | 56.0 t |
| Discovery Year | 1877 | 1903 |
| Discovery Location | Garden Park, Colorado, USA | Grand River Valley, Colorado, USA |
| Named By | Othniel Charles Marsh | Elmer S. Riggs |
Size Comparison
roughly the length of a large SUV
about as long as 5 cars end-to-end
Weight Comparison
comparable to 2.3 small cars
heavier than 9 African elephants
Timeline Comparison
Allosaurus and Brachiosaurus both lived during the Jurassic Late period and may have shared the same habitats.
Diet Comparison
Allosaurus
CarnivoreAllosaurus was a meat-eating predator, hunting other animals for food.
Brachiosaurus
HerbivoreBrachiosaurus was a plant-eater, feeding on vegetation like ferns, conifers, and cycads.
Classification Comparison
Allosaurus
Brachiosaurus
Did You Know?
Brachiosaurus was about 2.7x longer than Allosaurus.
Brachiosaurus weighed roughly 24x more than Allosaurus.
Allosaurus was a carnivore while Brachiosaurus was a herbivore.
Both dinosaurs lived during the Jurassic Late period and may have coexisted.
Allosaurus was discovered 26 years earlier, in 1877.
Allosaurus belonged to Theropoda while Brachiosaurus belonged to Sauropoda.
Compare With Other Dinosaurs
Explore These Dinosaurs
Explore the Natural World
Discover more across the Nature FYI family