PeachParts Mercedes-Benz Forum - View Single Post - What's the most efficient speed and or RPM for the diesels?

190D22 · #9 09-04-2002, 09:18 PM

I know the horse power curve peaks at 4200 RPM for the 2.2L. All 77 horses kickin at once, I was at 4500 RPM when I was at 94mph. I know that the engine's top speed is 5150 (great number, van halen friends! especially guitarists!) + or - 50rpm. So 5000 RPM it pretty much tachs out. That means it can only get to 100 or 110, and running really fast. I don't think running it at that high speed for long periods is a good thing. Right?