Lots of options here.  First you have to consider how much you are willing
to spend, and how much are you going to do yourself.

I am in the parts gathering stage of my 2.0TDI BHW swap into my Whitestar.
  I'll be doing a full write up as I go with pictures.    Head over to
tdiclub forums, there are a few guys that have posted up their TDI
conversions.

Gearing is a big expense to do it properly.   For me it's 700EUR for a ring
and pinion (4.14) plus freight and my time to install.  Add another $250
for 4th (or 5th) gear on there too likely.

Easiest swap is to stick with the early style engine block and 50 degree
mounting hardware (AAZ/AHU etc).  I would avoid AAZ due to crank gear
issues.  AHU/50deg/M-TDI pump is your easiest route.  Personally I'd go the
extra effort and wire up the electronic controls.

Jason

On Thu, Jan 26, 2017 at 2:58 AM, thewestyman <zolo@foxinternet.net> wrote:

> Hello everyone,
> I would like to put a bigger diesel into my van I have in Europe.
> It has a 1.6 turbo diesel in it now.  But it still goes very slow, barely
> making it to 70 mph.
> I think about 2.5 diesel turbo would be acceptable.  Only I don’t know if
> it can be fitted in.
> Is there anyone on this list, or you would know anyone who did change to
> bigger diesel engine.
> Gas is expensive over there.  Has to be diesel turbo.
> Anyone?
> Zoltan
>