Engine performance refers to how effectively an engine converts fuel into power. It is typically measured by factors such as horsepower, torque, and fuel efficiency. Higher horsepower indicates a more powerful engine, while torque measures the engine's ability to do work, especially at lower speeds. Several elements influence engine performance, including the design of the engine, the type of fuel used, and the condition of the engine components. Regular maintenance, such as oil changes and air filter replacements, can help maintain optimal performance. Additionally, advancements in technology, like turbochargers and fuel injection systems, can enhance engine efficiency and power output.