Cars with spark plugs:
* Gasoline engines: All gasoline engines use spark plugs to ignite the air-fuel mixture and power the engine.
Cars without spark plugs:
* Diesel engines: Diesel engines use compression ignition, meaning the fuel ignites due to the high heat and pressure created by compressing the air, not a spark.
* Electric cars: Electric cars have electric motors and do not use internal combustion engines or spark plugs.
So, while many cars have spark plugs, there are some exceptions depending on the type of engine they use.
