apples and oranges ... the new engine if same cid can make more power with less CR and cam. many places were things have came long .better heads. cam profiles . intakes. valves . valves stem size. seat angles. ring pack. roller cam more rpm better idle . less CR . better head chambers . .engines still get dyno striped down it.s how much stuff you want to hange off the front of the engine when it.s on the dyno