In my 300SE, 4000 rpm is about 80 mph. There is a distant whine from the engine but overall, the car is so quiet and refined that you really don't notice. If the flex discs neet to be replaced, then that will add noise, also engine/trans mounts. If the door seals are going bad, then that will add wind noise as opposed to engine noise.

I regularly get 22 mpg in the 300.

__________________
Regards

Warren

Currently 1965 220Sb, 2002 FORD Crown Vic Police Interceptor

Had 1965 220SEb, 1967 230S, 280SE 4.5, 300SE (W126), 420SEL

ENTER > = (HP RPN)

Not part of the in-crowd since 1952.