What are the advantages and disadvantages of 4 stroke engine?

Advantages of a 4-stroke engine include improved fuel efficiency, lower emissions, and quieter operation compared to 2-stroke engines. They also tend to have a longer lifespan due to better lubrication and less wear. However, disadvantages include greater complexity and weight, as well as higher manufacturing costs. Additionally, 4-stroke engines typically produce less power per cycle compared to 2-stroke engines, making them less suitable for certain high-performance applications.