Nissan Patrol 4.2 td lack of Low Down Power

Hi. I’m new to the group and enjoy what I have seen so far.
Being a 4.2 fan I purchased an 1988 built Y60 Non Turbo Wagon in 2000 which I still own today having traveled trouble free for 560,000 Klms never touched other than regular oil + filters.
When I decided to replace it in 2005 I went for the 4.2ST, beautiful vehicle to drive but the lack of low down power gives me grief, once the turbo cuts in she's away, but when starting off - specially on a hill she is very poor.
I have discussed this with the Nissan Service people at Nissan Bundaberg only to be told that its quite normal and the performance is satisfactory ????
I try to explain that my second Patrol the 1988 model would leave this one for dead.....
I have been told the current emission pollution control is to blame for the lack of power, that the injector pump has been significantly 'cut back' to improve the emission pollution, that I am luck as Nissan have stopped making the 4.2 version and mine was one of the last !!!!
Does anyone have an answer for me to help get this vehicle going........
It's so disappointing when I have had such a good run with my 1988 model I would expect more power than I have, because basically they are the same power plant so with all the extra bits that Nissan have put on the overall result is very poor. Fuel consumption is also down compared to my old vehicle where I could regularly get the 10klm / Lt.
I guess the answer is that with all the latest technology and improvements in design, the performance and economy take a backward step.
Hoping some one has an answer for me.
Thank you.
Brendon & Diane Wilkinson.