# Engine speed (rpm)

> Engine speed is the number of crankshaft revolutions per minute (rpm), shown on the tachometer.

- **Also known as:** RPM, Motor devri, d/d, Devir sayısı
- **Turkish term:** Devir (d/d)
- **Page:** https://motorsikletparcasi.com/en/glossary/rpm

- **[Idle speed](https://motorsikletparcasi.com/en/glossary/idle-speed):** the lowest speed the engine runs at with the throttle closed
- **Peak torque and power rpm:** given in the specifications (e.g. "11 kW / 8,500 rpm")
- **Redline:** the highest safe engine speed; a rev limiter protects the engine

How fast the engine turns at a given road speed depends on the gear and the [final drive ratio](https://motorsikletparcasi.com/en/glossary/final-drive-ratio); find the speed at a given rpm with our [gear ratio calculator](https://motorsikletparcasi.com/en/tools/gear-ratio-calculator).

## Related terms

- [Torque](https://motorsikletparcasi.com/en/glossary/torque): Torque is the turning force the engine produces at the crankshaft, measured in newton-metres (Nm).
- [Idle speed](https://motorsikletparcasi.com/en/glossary/idle-speed): Idle speed is the lowest engine speed at which the engine keeps running with the throttle closed.
- [Final drive ratio](https://motorsikletparcasi.com/en/glossary/final-drive-ratio): The final drive ratio is the rear sprocket tooth count divided by the front sprocket tooth count; it sets how engine power is geared to the wheel.

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- Source page: https://motorsikletparcasi.com/en/glossary/rpm
- Last updated: 2026-10-09
- Türkçe sürüm: https://motorsikletparcasi.com/sozluk/devir.md
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