Oversquare engines are capable of running at higher speeds and can have larger valves than undersquare engines.

Question

Quizplus · Accepted Answer

Oversquare engines, also known as short-stroke engines, have a bore (cylinder diameter) that is larger than the stroke (distance the piston travels). This design allows for higher engine speeds (RPMs) because the shorter stroke reduces the distance the piston has to travel in each cycle, leading to less stress on the engine components at high speeds. Additionally, the larger bore size provides more space for larger valves, which can improve airflow in and out of the cylinders, enhancing performance.

Oversquare Engines Are Capable of Running at Higher Speeds and Can