2.2 DTi produces more torque than a standard 2.5TD 
As Kevin recently educated me, a 2.2 DTi produces the same torque as the 3.2 V6, but does not exactly match performance. 
2.5 TD has more horses, and on paper (without being chipped) is faster than 2.2 DTi
Very little in it 
you sure about that?
I know i have played with my td for a few years and yes it does go well, BUT my 2001 DTI manual estate is a severe let down power wise!!! it is just not a powerful or as smooth, it is nice to drive however, !!and drives far better thanm ine, but just dont have the silky smoothness of me td,
in fact so much so that im considering selling it!! in spite of its spec being everything i want !! i,e leather aircon heated seats etc etc and A GEORGEUS colour!! it just doesent float my boat! plus its sat in swindon and im sat in spain!!lol
havent been able to comment on the dti before but in my humble opinion the td is a better engine but the dti facelift drives better !!