IP timing and valve timing will make a BIG difference in performance, so will boost pressure and ALDA setting.

Check the chain first, if stretched more than 8 degrees, replace. Set ALDA per the other posts on the forum (do a search), and I'd bet you will get similar performance if the turbo is in good shape.

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!