What is the configuration of the Cessna 172 engine?

The configuration of the Cessna 172 engine is a horizontally opposed arrangement. This design features cylinders that are positioned on either side of the crankshaft, effectively laying flat and parallel to the ground. This configuration is beneficial for several reasons: it helps to provide a lower center of gravity, which contributes to improved stability during flight, and it facilitates easier cooling due to the even exposure of the cylinders to airflow. The horizontally opposed design also improves the balance of the engine, which reduces vibration and enhances overall performance.

In contrast, in-line engines have cylinders arranged in a single vertical or horizontal line, which can lead to a higher center of gravity and potential balance issues. Boxer engines, often synonymous with horizontally opposed, typically refer to a specific type of engine used in some cars and are not the standard terminology used for aircraft engines. Therefore, while they share conceptual similarities, they are not classified in the same manner as the Cessna 172's engine.