T51 may refer to:
Aviation Cessna T-51, used by the United States Air Force Academy Flying Team Continental T51, a turboshaft engine Dan Jones International Airport, in Harris County, Texas, United States Slingsby T.51 Dart, a British glider Titan T-51 Mustang, a three-quarter size replica of the P-51 Mustang
Automobiles Bugatti T51, a French racing car Cooper T51, a British Formula One and Formula Two racing car Jiabao T51, a Chinese microvan Lester-MG T51, a British sports race car
Other uses T51 (classification), a wheelchair racing class T.51/ISO/IEC 6937, an ITU standard defining a multi-byte character set