F40

F40, F.40, or F-40 may refer to:

Aircraft

 * Farman F.40, a French pusher biplane reconnaissance aircraft
 * Hirth F-40, a German aircraft engine
 * F40, the NATO code for the JP-4 jet fuel

Automobiles

 * Beijing F40, a Chinese subcompact pickup truck
 * Ferrari F40, an Italian mid-engine sports car
 * BMW 1 Series (F40), a German subcompact hatchback
 * GM F40 transmission, a car gearbox

Trains

 * EMD F40C, an American diesel-electric locomotive
 * EMD F40PH, an American diesel locomotive

Watercraft

 * Brazilian frigate Niterói (F-40), a Niteroi-class frigate of the Brazilian Navy
 * HMS Jervis Bay (F40), a British armed merchant cruiser
 * HMS Roberts (F40), a Roberts-class monitor of the Royal Navy
 * HMS Sirius (F40), a Leander-class frigate of the Royal Navy
 * INS Talwar (F40), the lead ship of the Talwar-class frigates of the Indian Navy

Other uses

 * F40 (classification), a disability sport classification for athletes of short stature
 * F40 (full name F40T12) is a common size fluorescent lamp, at 4 foot or 1.2m