The BHP rating of an engine is important because it provides an indication of the engine's performance and capabilities. A higher BHP rating generally means that the engine is more powerful and can produce more work. However, it is important to note that the BHP rating alone does not tell the whole story about an engine's performance. Other factors, such as torque and fuel efficiency, should also be considered when evaluating an engine.
In automotive applications, BHP is often used to compare the performance of different engines. For example, a car with a 36 BHP engine may be more powerful than a car with a 25 BHP engine, but it may also be less fuel-efficient. Ultimately, the best engine for a particular application depends on the specific needs and requirements of the user.