FWIW, I have read that the factory 0-100kph (62mph) times for the 240 and 300 D (W123) series were as follows

300d Turbo - 15.0 seconds
300d NA - 19.2 seconds
240d manual - 31.3 seconds
240d auto - 33.1 seconds

Dunno about the SDs or TDs - but with similar weights and engines they should be close.

Of course those are in original factory condition - which few of them are now 20+ years later...

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1984 300 Coupe TurboDiesel
Silver blue paint over navy blue interior
2nd owner & 2nd engine in an otherwise
99% original unmolested car
~210k miles on the clock

1986 Ford F250 4x4 Supercab
Charcoal & blue two tone paint over burgundy interior
Banks turbo, DRW, ZF-5 & SMF conversion
152k on the clock - actual mileage unknown