I have owned a few Peugeots, 205, 306, 405. Most of them have been diesel, both Turbo and normally aspirated.
Whilst Peugeots XUD7 and XUD9/9T may not the most refined of engines, mainly at tickover, they were most certainly reliable and willing.
You had to keep an eye on oil and coolant with them though, as if they overheated due to either or both being too low, they could be really problematic from there on.
Otherwise, fantastic engines and great, super comfy cars.