Here's what I notice on my '79 240D (has about 1000 miles on the new rebuilt engine at this point): when I start it in the morning from dead cold, outside temps around 45, it's predictably sluggish.

BUT, at about a mile or two out in city traffic, with the temperature gauge showing about 60C, it seems extra peppy! Quick off the line. Zippy.

Then I'm on the highway for 10 miles. No problems, just steady speed. Once I'm across the river I'm back in city traffic for a few miles. At this point the temperature gauge is around 85C, and she's not quite as zippy. Still good, but not leaping to the touch. I think there's plenty there if I mash the pedal, but I don't typically drive that way.

Funny, huh? Could all be perception, I suppose.

Kurt

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- '79 240D - engine swap complete! Engine broken in! 28-31 mpg! Lovin' the ride!
- '86 190D (W201-126) - 2.5 NA engine, 5 speed, cloth interior, manual climate controls, 33-34 mpg (sold to forum member).