Multi-cylinder engine

A vehicle comprising:

• a multi-cylinder engine mounted on the vehicle;
• a crank shaft disposed substantially in a horizontal direction in the multi-cylinder engine;
• a plurality of cylinder bore rows arranged perpendicular to the crank shaft, each cylinder bore row including a plurality of cylinder bores disposed in parallel, each of said plurality of cylinder bores including pistons slidably fitted therein;
• a plurality of cylinder heads, each cylinder head forming combustion chambers between the pistons and the cylinder heads;
• cylinder blocks corresponding to said cylinder bore rows, said cylinder blocks being connected to said plurality of cylinder heads;
• a plurality of intake passages and a plurality of exhaust passages respectively in communication with said combustion chambers are provided in said cylinder heads;
• said intake passages and said exhaust passages are provided in said cylinder heads such that a relative positional relationship between said intake passages and said exhaust passages in the axial direction of said crank shaft for one of said cylinder heads is substantially equal to a relative positional relationship between said intake passages and said exhaust passages in the axial direction of said crank shaft for another of said cylinder heads;
• and
• a cam shaft provided on each of said cylinder heads for opening/closing a plurality of intake valves and a plurality of exhaust valves provided on each of said cylinder heads, said plurality of intake and exhaust valves being arranged in a same line.