Automotive engines are machines that convert fuel into mechanical energy to power vehicles. They typically operate on the principle of internal combustion, where fuel and air mix and ignite within cylinders, creating pressure that moves pistons. This movement ultimately turns the vehicle's wheels. There are various types of automotive engines, including gasoline engines, diesel engines, and electric motors. Each type has its own advantages and disadvantages, affecting factors like fuel efficiency, power output, and environmental impact. Understanding these differences helps consumers make informed choices when selecting a vehicle.