The invention discloses an engine and a vehicle having the same. The engine comprises a vacuum pump, a cam bearing cap, a cylinder cover, a cover plate, a cam shaft and a suction pipe. The vacuum pump comprises an upper shell, a lower shell and a rotor, wherein the upper shell is arranged on the top wall of the lower shell; and blades are arranged on the rotor. The upper shell is disposed at the front side or the back side of the cam bearing cap and is formed integrally with the cam bearing cap. The cylinder cover is disposed below the cam bearing cover, and fits with the cam bearing cap to define a cylinder chamber. The lower shell is formed integrally with the cylinder cover. A vacuum pump cavity is defined by the cover plate, the upper shell and the lower shell. The rotor is connected with the end of the cam shaft. The cam shaft is arranged in the cylinder chamber. The rotor is arranged in a cavity of the vacuum pump. The rotor is formed integrally with the cam shaft. The suction pipe is arranged on the upper shell and is communicated with the cavity of the vacuum pump. The engine disclosed by the invention is compact in structure, small in size, low in weight, easy and simple in engine arrangement and short in assembling time.