Question: what is the difference between jp54 and jet a1?
Answer: JP54 powers gas turbine aircraft engines. Jet A and A-1 have specifications that can be used in fuel worldwide. ... It is similar to “Jet A” except the the Specific Energy is 18.4 mj/kg compared to that of 42.8 mj/kg of “Jet A”. Also there is a slight difference in additives.