J81 may refer to:
Vehicular Westinghouse J81, an axial-flow turbojet engine Renault Espace (J81), an MPV LNER Class J81, a British locomotive class designed by Thomas Wheatley , a VIN prefix used in Asia; see vehicle identification number
Other uses Metabidiminished rhombicosidodecahedron (Johnson solid ) Guirguillano Observatory (obsevatory code ), Guirguillano, Spain; see List of observatory codes
See also
Shenyang J-8 I "Finback", a Chinese jet fighter plane, a variant of the MiG-21
81 (disambiguation) J (disambiguation)