If the force succeeds in moving something then Work is done. Work is a unit of measure that is calculated by multiplying that force applied by the distance is moved. If 100 pounds was used to slid an object 5 feet then the work done was 500 pounds-feet. To figure the Work done on an engine when a crankshaft turns one full turn, you need to know how far it is around that circle. Knowing that, you then have to check on how long it took.
Power is the amount of work done in a given length of time.
Power generated at 3000 rpm . A four stroke fires every other stroke, think in pairs of rpm. A four stroke with same lever-force specs as a two stroke, the crank pin would have to do twice as much work to per firing due to distance being double. The power would be the same. This was conceived by James Watt about 200 years ago.