True a single torque & HP graph doesn't tell the whole story, but it is very informative about the engine's general operating characteristics. The point is, I would much, much prefer a graph to the all-to-common single "XX.XXHp" rating given by engine manufacturer - talk about being utterly useless.

For example, knowing the torque curve of my G23 really helped me in deciding on a prop that allows the engine to optimize the use of the power band. I wish I could have that for all my engines.