Engine and vehicle having the same

A vehicle, comprising an engine comprising a cylinder block, a cylinder head, and a piston,

• the cylinder head connected to the cylinder block, the piston being movably connected to the cylinder block, and the cylinder block, the cylinder head, and the piston forming a combustion chamber;
• and
• the cylinder head comprising an intake valve hole and an exhaust valve hole, an intake valve disposed at the intake valve hole, an exhaust valve disposed at the exhaust valve hole, a barrier protrusion protruding at an edge of the intake valve hole away from the exhaust valve hole, an included angle between a first connecting line connecting a first end of the barrier protrusion and a center of the intake valve hole and a second connecting line connecting a second end of the barrier protrusion and the center of the intake valve hole being greater than about 120 degrees and less than or equal to about 180 degrees,
• wherein the engine further comprises a squishing and guiding structure disposed on a top surface of the piston, wherein a top surface of the squishing and guiding structure includes a concaved pit structure.