funny here.... lots of different opinions. I bought the 170 and spoke to simon at ecotech performance. His advice to me was if the DPF was not giving issues then to just leave it as is for the time being and just remap. Are they not both essentialy the same engine???
The 140 is way more reliable
Apart from the dodgy turbo & cylinder head failure issues. At least the injector issue is being covered & rectified on the 170, whereas the faults with the 140 aren't.