It's complicated but I had it delivered but have SORN'ed it until April 1st. I was just out on the drive running it up and noticed it won't rev up. I can't take it on the road yet but want to be sure it will accelerate when I do.
The newest diesel engines have protection at higher rpm, in case that is not in gear, will not accelerate over a certain rpm...strange that you have it on PUG, as I know is implemented on Mercedes, BMW, Audi.
You will see what is going on when you will drive it...use a parking area at night ( a very large one) to check it...it would be nasty to have a problem at particle filter or sensor and cut your power when you are in traffic...
You've more or less confirmed my thoughts. I won't be driving it until April 1st, but was concerned that I might have a problem accelerating away. I'll report back after that in case others notice a similar lack of rpm when stationary.
It's there to stop you blowing the engine up if the car is set to cruise control and for some reason get knocked into neutral, it automatically restricts the revs otherwise they'd go through the roof (bonnet)
It seems to be an "over reving protection" just in case it got knocked out of cruise control while driving. But anyway, my problem cleared as soon as I got on the road and moving. Really enjoying my 2008.