Agree with you and Oscar about the 280, everyone who owns one, likes it very much. It must be the combination of the sound and that it is an engine designed for reving, which makes it sportive. the performance is designed to come at high revs. Many also say it is the best gas MB engine for durability. The look of that long rectangular block is also good. aah, consumption, well thats never good with these.
As a fellow M110 owner/lover, I want to say something about the consumption on these engines. Granted, it's no '84 190D 2.2 giving just over 50 MPG with the 5-speed, but it's not bad...for example, a buddy of mine just bought an '07 Chevy with a 4
Cylinder...he's getting low-mid 20s. My 280 gives me 19-22 in proper tune, plus it sounds better and has lots of power. My M110 is 30 years old, and the design is 35-40 years old, and has almost 450,000 kms on it...his 4 cylinder is brand new...
Gripe about the way the M110 uses gas if you like, but I think it's decent.