Okay so I was getting a bit confused by your reactions and the numbers ...
So today I decided to really test myself.
I went with my wife and kid to visit my wife's 96 year old grandmother in Gent ... we drove together by car and I drove back by bike.
It was a nice and sunny yet not too hot day and there was almost no wind.

This was the course:





Total distance was just under 48 kilometers (30 miles).
As you can see it goes extremely flat for the first 15 kilometers (almost 10 miles) as it follows a canal around the city of Gent there ... then it goes through the city and follows big roads again to where I live. In the last part it goes up about 60 meters over 20 kilometers which isn't that much but still.

Average over the first 14 kilometers was 37,1.
Average over the last 34 kilometers was 34.
Overall average was 34,9.

Calculated power output over the first stretch is around 330 watts.
I am not kwown as a sportive man and until last year when I assembled my bike I hadn't actually ever done any sportive things.
I am astonished myself and I am considering picking up a training program and starting training for timetrails or something like that.
I just returned and may be talking weird because my testosterone levels are probably still a bit high right now, especially considering the old guy in the car that nearly drove me off the road and whom I shouted at like a madman insulting him for every horrible thing imaginable ... that helped btw

At a certain point I was apparently going 188 km/h:



It might also have been a broken speedsignal