I'm assuming, which is usually a bad thing here, that your 240d was a w123 (1985 and older)

I don't know about the 91-93 which would be a 602 if I'm correct?

but I do know that flywheel will bolt up to a 617 (5cyl 3.0) of the same era, but mark and check the balance of the flex plate and flywheel first, if they aren't a match then you'll have big issues

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1982 300D (w123, "Grey Car")
1982 300D (w123, "Blue Car")
2001 Ford F150 "Clifford" (The Big Red Truck)
1997 Dodge Ram 2500 12V Cummins
1996 Dodge Ram 2500 12V Cummins
Previous Vehicles:
1995 E300D, 1980 300SD, 1992 Buick Century, 2005 Saturn Ion