Porsche 911 engine model

Here is a comparison of the flat six model engine to the life size real engine.  The plastic functioning model looks rather smug perched up alongside his bigger brother.  I’m test running this engine out of the car, in a makeshift fashion.  My son built this little scale working model, which is available on Amazon among other vendors.  I would say that It would have been nice if the model came with a clear engine shroud.  That would make it more complete, and the builder could better understand the function behind the cooling fan.