Interference engines are often used in high-performance engines because they can squeeze more air and fuel into the combustion chamber. This provides better fuel efficiency and more power. However, interference engines are also more complex and expensive to build.
In comparison, a non-interference engine has enough piston to valve clearance even when the valve timing is incorrect. Because of this, the piston will never hit an open valve. This makes non-interference engines more durable, reliable, and less likely to cause damage.
Most modern engines are interference engines, but there are still some non-interference engines on the market. If you are unsure of whether an engine is an interference engine, you should consult the owner's manual or contact the manufacturer.
