i have your exact same car... its gray.. and has 250k miles... and yes they are very slow....they have the worst take off of any car on the planet... from a dead stop at a stop sign.... where your car should have lost of power is from say 50mph to 70mph.... take a drive on the interstate and see if the speed lags as you go up hill..... thats how you tell if there is something wrong..

If it bogs on the hills at high way speeds there here is what you do in this order...

1. change air filter... 9 bucks at pepboys..
2. change both fuel filters 18 bucks napa...(or buy this online here)
3. Run some fuel injector cleaner through a few tanks of diesel..

(now your car should go 100 on the interstate)

If it does not then you must clean the banjo bolt on the back of the turbo.
and have the valves adjusted.....you may also try capping off the vacuum hose to the egr valve.....

But I have not found anything that will help on take offs.... other than perhaps propane injection......