What type of engine does the described aircraft have?

The aircraft in question is equipped with a horizontally opposed four-cylinder engine, which is a common configuration in many general aviation planes, especially those used for training and private flying. This type of engine layout allows for a more balanced weight distribution and lower center of gravity, which enhances the aircraft's handling characteristics.

Additionally, horizontally opposed engines tend to have fewer vibrations when compared to other configurations, which contributes to a smoother flight experience. These engines are typically air-cooled, making them simpler in design and maintenance, which is beneficial for pilots who are new to flying and may not have extensive mechanical knowledge.

In contrast, radial engines, while historically significant, are less common in modern training aircraft and generally apply to different types of aviation, including older military and commercial aircraft. Turbocharged inline engines usually feature a different layout and are often associated with higher-performance, more complex aircraft. A V-shaped six-cylinder engine would also introduce different performance characteristics and complexity that may not align with the typically simpler design of training aircraft. This recognition of the commonly used engine types in training aircraft helps clarify why the horizontally opposed four-cylinder is the most fitting choice.