He's a Euro link that gives 123.7 PS, which I assume is about 124 HP, for an '87. No torque rating given:

http://www.globalcar.com/datasheet/Mercedes-Benz/1987Mercedes-Benz1902.5TurboDiesel.htm

Here's another from the MShop forum, with hp and tq breakdowns:

http://www.peachparts.com/shopforum/showthread.php?t=104646&page=2

Torque does seem low considering my 1.9l TDI put out 155 ft./lbs at 1900 rpms stock, and with chip now delivers more than 200 ft./lbs.

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'91 300D 2.5 Turbo 330K
'00 VW TDI Golf, 190K
'67 BMW R50/2
'73 Norton Commando Interstate