In the context of internal combustion engines, the displacement of an engine refers to the total volume swept by all of its pistons during one complete combustion cycle. While displacement plays a role in determining an engine's power output, there are several other factors that influence horsepower, such as engine design, efficiency, and operating conditions.
Therefore, without knowing specific details about the engine in question, such as its type, stroke, compression ratio, RPM range, and other design parameters, it is not possible to accurately determine the horsepower equivalent of 208 cc.
To obtain the exact horsepower rating, it is best to refer to the specifications provided by the engine manufacturer or conduct proper tests and measurements on the engine.