In Germany there are at least two tuners offering 4 inline TDI
(like US TDI Passat) conversions for Vanagons, Syncros too.
As an example, Winkler offers the conversion kit for DM 7000,00
including TDI engine 90 hp or 110 hp. To convert a waterboxer
Syncro you will need a lot of Vanagon Diesel parts and a modified
left engine support.

BTW: A TDI Vanagon speeds up to 140 KPH at a very fast
acceleration by using a Turbo Diesel gearbox.

Helmut
'80 Camper
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From: Henry C. Luhrs
To: Vanagon
Subject: Frankfurt Auto show
Date: Thursday, 18. September 1997 03:58

  One interesting thing I noticed there was that about half of all
the VW's and Audi's had TDI on the back. The Passat that we rented had
the TDI engine and it felt like a V6. We got it up to 200 KPH (120
MPH) on the autobahn. I think that it would be a great upgrade for my
Vanagon Syncro over here. Now, if I can only find a passat TDI that
was rear ended and totaled...

Henry Luhrs, Massachusetts
78 Bus
85 Jetta GLI
87 Vanagon Syncro