noun
Refers to a machine that converts energy into mechanical motion, commonly used for car engines, aircraft engines, and similar devices.
この車のエンジンはとても静かだ。
This car's engine is very quiet.
エンジンをかける前にシートベルトを締めてください。
Please fasten your seatbelt before starting the engine.
モーター typically refers to an electric motor, while エンジン usually implies an internal combustion engine or a broader mechanical power source.
Loanword from English 'engine', adopted into Japanese with the katakana spelling エンジン.