A comparative test performed by Dr. Brady Barr of National Geographic showed that a pit bull had a slightly lower bite pressure in terms of pounds per square inch when compared to the German shepherd. The test measured bite strength, rather than body strength, among different types of dogs.
Pit bulls are the most recognized breed for superior jaw and bite strength. However, in the National Geographic study described by The Real Pit Bull, the German shepherd slightly outperformed the pit bull. The German shepherd's bite measured 238 psi, whereas the pit bull measured 235 psi. The Rottweiler's bite strength was much higher than both of them, at 328 psi.