How fast should a 257,000-horsepower light cruiser be?

What speed would a light cruiser with 257,000 shaft horsepower be expected to reach?

More than 40 knots with reasonable propellers; the reported design reaches 42.9 knots and is intended to catch destroyers.

Installed power gives a rough speed expectation, though propeller efficiency could still waste some of it. A light cruiser with 257,000 shaft horsepower is estimated to exceed 40 knots. The reported game design reaches 42.9 knots. That figure matches its assigned purpose of overtaking destroyers.