Just looked at my W116 79 300sd. It is not the same as my 85TD. 0-20 is much smaller than 20-40m just like the TD. But the five mph increments from 20mph upwards all seem to be identical distances whereas on the 85TD they vary. Weird.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13