An inline engine is a type of internal combustion engine where the cylinders are arranged in a straight line. This design is commonly used in many vehicles because it is compact and efficient. Inline engines can have various numbers of cylinders, typically ranging from three to six, which affects their power and performance. One of the main advantages of inline engines is their simplicity, which makes them easier to manufacture and maintain. They also tend to have a smoother operation compared to other configurations, such as V engines. Inline engines are widely found in cars, motorcycles, and some trucks.