Hi Jon,
This is a (dirty) XUD7 engine:
I've got one.
This is a (cleaned) XUD7T engine:
My brother's got one.
This is a (xud7t converted to a) XUD7TE engine:
Your engine, isn't it ? Well, I've also seen one - Mk1 405s.
This is a (carb-ed) 1905cc XU engine:
We've all seen this one at least once
They may all look pretty similar at first sight, but indeed are pretty different (esp. between XUs and XUDs, of course), but both have specific noises - just with my ear I know if it's a Peugeot, and more specifically if it's a XU, a XUD, a TU or a XD engine.
And why would one bother building a XUD9 engine in a 205? There's not very much improvement in doing that. The 1769 cc engines are far more reliable
Well, both 1769 and 1905 versions of the XUD are very reliable. Some 205s were sold with the XUD9 for export. I've heard of Spain (not sure about this), but what I'm certain is about German 205Ds. They had the XUD9 in its catalyzed version (just a passive catalyzer, with an EGR valve, nor electronics nor lambda sensor AFAIK). Improvement is about 3-5HP according to official (Pug's) specs, which may let run the car at about 160-165KPH. Too much work for a tiny difference, I have to agree.
and with turbo and intercooler capable of reaching 110 bhp without major changes.
With turbo, 78HP, turbo and intercooler it was given for 90HP, to reach the 110HP line you have to tune it a little, perhaps adding a bigger intercooler and modify the pump's setup. Could you please give us the mods you need to reach 110BHP (111.5HP) ?
Someone here in the Netherlands is also planning to fit a/c on his 205. He has a 205 Griffe, wich is very packed with extra's already. He said it can be done. So, he will try.
But it possibly requires a lot of work. I thought the Griffe had a/c as standard. I stand corrected, perhaps wasn't it at export, after all.
I'm planning to build powersteering on my 205. I'm not sure to use a mechanical pump or an electrical... Since the intercooler is placed, there's not much room for a mechanical pump though...
Have a look to late, late 205s (called Génération here), perhaps Sacré Numéro (years 96-98 for Génération, 94-96 for SN), at least the Génération had an electric pump.