Horsepower is a mathematical function of torque, as 273 and others have said. I should post a few of my redrawn dyno graphs... they all cross at 5252RPM, simple physics. No matter be it a lowly 318 or a race 436...
But a lowly 318 has low torque AND low horsepower, whereas the 436 is quite the opposite. It's all in the combination of all things together... not just the engine alone (edit: to determine who's faster :))
