This is about the fourth braking thread on here that I have put my twopenn'orth into, and it has gone the same way as all the previous ones.
I do actually firmly believe that the 156 JTD 1.9 16v
from around 2005 for some reason
was fitted with inferior braking components. I believe this because several owners of that specific model, including myself have spoken about it at length. My daughter has a 156 with excellent brakes. But it is a petrol model from 1998 with a 1.6 engine. Don't think that tells me anything, does it?
To clarify - my car had this problem from new, it deteriorated slowly over about 18months to a point where, frankly, I might as well not have had any brakes.
Fact is, having considered many theories concerning fluid, pads, hoses, and god knows what else suggested by very knowledgeable people on this excellent forum, I opted for upgraded discs and pads on the front only and guess what? Problem solved.
That may not mean the whole problem is solved - maybe the servo is a bit on the pathetic side, maybe better quality fluid would improve the situation further, possibly superior hoses also, but hey, my car stops now. It didn't before (and I really mean that - it was potentially very dangerous). I am now very happy with what I have.