What is the Horsepower for an 1800cc Honda gold wing engine?

There is no direct correlation between engine displacement and horsepower. One 1800cc engine may produce lots of horsepower, while another of the same size will produce more torque but not as much horsepower. It depends on the engine design and what it was made for...In general, a long stroke, slow turning engine will produce more torque but less horsepower than a fast spinning short stroke engine.

A typical example would be a 1400cc sport bike, like the Suzuki Hayabusa, which turns out almost 200 horsepower, while a larger 1500cc V-twin Kawasaki Vulcan