General   (General discussion, talk about anything.)

You are right, in one sense, but collectively wrong!
A modern engine is the same, fundamentally, as an old engine. However, some older engines are stronger and more reliable than a more modern engine.
But, to cover all aspects of the many different engines used would take far too much time. I'm sure you can realise the difference between a 6 litre Bentley W12 engine and a Ford Fiesta 1300? Every one is different although just the same.