Ford Transit Bj 90, 2.5l d low power

Hello, my transe bj90 51kw suck diesel seems to me to be much weaker than the transit (bj 91 also 51kw) of a friend. It is the same engine installed, only the engine code is different: your TES, my TAS. your rides with high roof on track 125, my with flat roof only 110. However, the consumption is significantly lower: about 8l with it so about the 9-10l. So far everything fits, only why does not mine go faster? 130 is entered in the bill. I made oil, dieselfi With the air filter the following: The filter box did not close properly, there was something broken off, so I drove it 1000km, then discovered it and fixed it with a clamping belt. I don’t know how much it drove before my purchase without a really shot air filter. It jumps great and runs round. Stand-up gas is slightly low, shakes quite nicely in the stationary gas. Also in the acceleration it is slower than that of my girlfriend. Coupling is fine! Got her ne idea? do I have to make myself sogrgen? on the basis of the low breaking values probably not? Aunt Edith: What is this for an injection pump Bosh or Lucas?