T40

T40 or T-40 may refer to:

Aviation

 * Allison T40, an American turboprop engine
 * Lockheed T-40 JetStar, a proposed American jet trainer
 * McGehee Catfish Restaurant Airport, Love County, Oklahoma, United States
 * Turner T-40, an American homebuilt aircraft

Automobiles

 * Covini T40, an Italian sports car
 * JAC T40, a Chinese SUV
 * T-40 (tractor), a Soviet farm tractor

Weapons and armour

 * T-40 tank, a Soviet amphibious tank
 * T40/M9 Tank Destroyer, an American gun motor carriage
 * T40/M17 Whizbang, an American tank-based rocket launcher
 * MKEK T-40, a Turkish grenade launcher

Other uses

 * T40 (classification), a disability sport classification
 * IBM ThinkPad T40, a laptop