For certified piston aircraft, generally yes. The engines are pretty much made by a few manufacturers based on ancient designs, and while you may get some "newer" benefits in some models, such as fuel injection (instead of carborators), or digital engine control (FADEC), they're pretty much ancient technology compared to modern engines. Most still have manual mixture control for example and very limited monitoring.
The only example in that class (sub $750k) I can think off the top of my head with a better engine is DA40 NG, which uses a modified Mercedes diesel engine.
The only example in that class (sub $750k) I can think off the top of my head with a better engine is DA40 NG, which uses a modified Mercedes diesel engine.