Last Updated：2025/11/23

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(automotive) Of an internal combustion engine design, in which the diameter of the piston is greater than its stroke distance.

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over square

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Source Word

over square

Adjective

not-comparable

Japanese Meaning

ピストンの直径がストローク（行程）より大きい内燃機関の設計を指す。

What is this buttons?

The over square engine design allowed the sports car to rev higher without sacrificing reliability.

Google Translation / DeepL Translation

オーバースクエアのエンジン設計により、そのスポーツカーは信頼性を損なうことなく高回転を維持することができた。

Details

Sense（1）

An over square or short stroke engine occurs when the cylinder bore diameter is greater than its stroke length, giving a bore/stroke ratio greater than 1:1. An over square engine allows for larger valves in the cylinder head because the wider bore creates a broader combustion chamber.

Google Translation / DeepL Translation

Details

over square

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over square

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