Despite the limited fossil remains it is clear that Eustreptospondylus was a bipedal, carnivorous, theropod dinosaur, related to the line that ultimately gave rise to Tyrannosaurus.

Only one fossilised specimen of Eustreptospondylus has been found in a quarry north of Oxford, England. The skeleton was found in marine clays so it was probably a carcass that had drifted out to sea.

The single skeleton is of an animal about 5 metres long. This is fairly small for a theropod. However vertebrae of this specimen looked as if they had not finished growing so this individual was probably not fully grown, and just how big this animal got is not certainly known.