A40

A40 or A-40 may refer to:

Roads

 * A40 motorway (Canada), a road in Québec
 * A40 motorway (France)
 * A40 motorway (Germany)
 * A40 road (Great Britain), a road connecting London and Fishguard, Wales
 * A40 road (Northern Ireland), a road running from the L/Derry to Raphoe
 * A40 road (Isle of Man), a primary road which connects the A3 with the A1

Other uses

 * A40, a Queen's Pawn Game, Encyclopaedia of Chess Openings code
 * Antonov A-40, a Soviet flying tank design
 * Archambault A40, a French sailboat design
 * Archambault A40RC, a French sailboat design
 * Austin A40, a car from the British Motor Corporation
 * Innocenti A40, variant of the Austin A40 produced by Innocenti
 * Beriev A-40, an aircraft
 * Samsung Galaxy A40, a midrange smartphone by Samsung