HDi 16v head onto HDi 90 8v? - mss1tw
Just pondering the above 'transplant'.

What do you reckon? I don't have any plans of the engines obviously, but as the HDi itself was based on the XUD engines in places, it doesn't sound beyond the realms of possibility.
HDi 16v head onto HDi 90 8v? - blue_haddock
It would almost certainly be more hassle than it's worth, if it's more power you are looking for the stock 90 bhp 2.0 HDi can fairly easily be tweaked to around 140 bhp and if it's big power they can be reach 190bhp whilst still being reliable and suprisingly economical.