Square, Over-Square & Under-Square Engines Explained | Bore-Stroke Ratio Made Simple!
In this video, we break down the secret behind engine performance — the bore–stroke ratio. You’ll learn what makes an engine square, over-square, or under-square, and how this simple ratio decides whether your engine delivers high-speed power or low-end pulling torque.
Here’s what you’ll learn:
• What bore and stroke actually mean
• The difference between square, over-square, and under-square engines
• How each design affects RPM, torque, and horsepower
• Real-world examples — from superbikes to trucks
• Which engine type is best for your needs