I have owned 2 Di's and also 2 CRD's, and my vote is with the CRD's ...... even though I have had no trouble with any of them
Here is my run down for you
01 lacked a little low down grunt off the mark when taking off with a load .... Fixed with a chip
03 More grunt off the mark, and went like a rocket with the chip
Fuel economy was the same with both Di's.
07 CRD Better grunt off the mark again, but slower than the 03 rocket. Never bothered with a chip, as it seemed adequate.
11 CRD Same as 07, but a little less grunty off the line.
Fuel economy same for both CRD's and use 0.1 - 0.2 litres more per hundred than the Di's