What is the reason for the Focus using a three-cylinder engine?

[JessicaLynn]

Focus three-cylinder engine has advantages in power data and fuel economy. The following is an introduction to the pros and cons of three-cylinder engines compared to four-cylinder engines: Advantages of three-cylinder engines: Three-cylinder engines have less turbo lag compared to four-cylinder engines of the same displacement. Compared to four-cylinder engines of the same displacement, three-cylinder engines have better low-speed torque. They have less mechanical friction, lighter weight, and smaller size. Disadvantages of three-cylinder engines: Compared to four-cylinder engines of the same displacement, three-cylinder engines have more noticeable vibration and noise, poor power performance in the high-speed range, and relatively sluggish throttle response.