The invention refers to a V-type multi-cylinder engine having a pair of cylinder banks disposed in V-shape and to an air intake system associated thereto, comprising surge tanks each disposed above each of the cylinder banks and air intake tubes each branched from one surge tank and connected with the associated cylinder, respectively. Each air intake tube (15a, 15b) branching from the surge tank (14a, 14b) of the one cylinder bank to be associated cylinder (1a, 1b) of the other cylinder bank is communicated through an intake opening (17) to the surge tank (14a, 14b) of the other cylinder bank comprising said associated cylinder (1a, 1b) wherein the flow area of said intake opening (17) being controlled by a control means (20) in response to the revolution speed of the engine (1).