There are a few random manual 240ds reported that appear to be somewhat faster than the average examples. I have one in the garage with a still very low mile replacement engine from mercedes.
It seems to do above quoted averages. Or the speedometer is bad. The noise inside is pretty bad at those speeds though. I have never investigated or noticed if there are any differences to account for the effect.
I also own another one that seems to comply with the common perceptions of average 240d performance usually posted on site.
So if a twin to the one in my garage was down your way. Why were you holding him up? He probably picks the toyotas and hondas out of his grill regularily just to restore normal cooling.