There are several types of engines, but the most common are internal combustion engines and electric engines. Internal combustion engines work by burning fuel, like gasoline or diesel, to create power. This process involves a series of small explosions that push pistons, which ultimately turn the vehicle's wheels. On the other hand, electric engines use electricity stored in batteries to power the vehicle. They are quieter and produce no emissions, making them more environmentally friendly. As technology advances, many vehicles are now combining both engine types, leading to the rise of hybrid vehicles that offer the benefits of both systems.