What is the difference between BMW's three-cylinder and four-cylinder engines?

[SilasRose]

Compared to four-cylinder engines, three-cylinder engines have less exhaust interference. When paired with small-inertia turbo technology, three-cylinder engines offer better low-end torque and reduced turbo lag compared to four-cylinder engines. More knowledge about engines is as follows: 1. Introduction: An engine (Engine) is a machine capable of converting other forms of energy into mechanical energy. The first external combustion engine was invented in 1816 by R. Stirling in the UK (Scotland) and later improved by Watt into the steam engine. 2. Classification: Engines can refer to both power generation devices and the entire machine including the power unit (e.g., gasoline engines, aircraft engines). Types include internal combustion engines (e.g., gasoline engines), external combustion engines (e.g., Stirling engines, steam engines), gas turbines (used in racing cars), electric motors, etc.