Just remember a basic thing on diesels : because of the finite time of the flame frontier on diesel fuel to expand, there is also a finite usable max rpm on a diesel.
This is considerably lower than on petrols. You wont get any pullpower beyond some 4400 rpm from a diesel, inherent by the principle of diesel operation.
Just to remind you, so you dont stay puzzled in the near future ...
But the fun is to pull away from just about anything at 1500rpm and up ...