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