Definition

Noun: 1. An internal combustion engine designed to run on petrol (gasoline): A type of engine where fuel (petrol) is mixed with air inside a cylinder and ignited by a spark plug. The resulting explosion creates force that moves pistons, generating mechanical power. This is the most common type of engine in automobiles.

Usage

The term "petrol engine" specifies the type of fuel an internal combustion engine uses. It is used to distinguish this engine type from others, such as diesel engines or electric motors. * It is commonly used in technical descriptions, automotive contexts, and in regions where "petrol" is the standard term for gasoline. * Example: "Most modern cars are powered by a petrol engine."

Examples

• "The mechanic specializes in repairing petrol engines."
• "A hybrid vehicle combines a petrol engine with an electric motor for improved efficiency."
• "Compared to a diesel, a petrol engine typically operates at higher revolutions per minute (RPM)."

Advanced Usage

• The term can be part of more specific compound nouns in engineering, though these are distinct terms:
  • petrol-engine vehicle: A vehicle powered by a petrol engine.
  • four-stroke petrol engine: Describes the specific operating cycle (Otto cycle) of the engine.

Variants and Related Words

• Gasoline engine (primarily North American English): A direct synonym for "petrol engine," using the term "gasoline."
• Spark-ignition engine: A more technical term highlighting the ignition method (via spark plug), which is characteristic of petrol/gasoline engines.
• Internal combustion engine (ICE): The broader category to which petrol engines belong.
• Motor: A more general, sometimes less formal, term for an engine. (e.g., "a car's motor").

Synonyms

• Gasoline engine (US English)
• Spark-ignition engine (technical)

Antonyms / Contrasting Terms

• Diesel engine: An internal combustion engine that uses diesel fuel and relies on compression for ignition.
• Electric motor: A motor that uses electrical energy to produce motion.
• Steam engine: An engine that uses steam pressure to generate power.

Noun

1. an internal-combustion engine that burns gasoline; most automobiles are driven by gasoline engines