The later 124 300d with the five cyl. 2.5l motor has a ratio of 2.65. It takes a while for that one to wind out but once rolling it will cruise right along at 85 with no sweat.

If you have a 3 liter na diesel and a five speed I would think you could pull a 265 or a 288 with no sweat and get great mileage. If you live where you will be taking off on hills and such maybe stay away from the 265. A 307 would be no sweat, I don't think in a 124.

If you wanted a little more pep the diff from the 190 16v might be in order, IIRC that is a 336 or 327.

Tom W

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.