Is an engines life shortened by it doing higher rpms while driving??

My freind has a Chrysler Cirrus and it has a Mitsubishi 2.5 V6 in it and during normal driving it shifts between 2500 rpm to 3500 rpm and you can feel that there is no torque at all. Listening to this engine, it sounds like it does alot of work! Or maybe I am just used to my w126 V8!

What are anyones opinions on this?? I also heard the 300se in the w126 is known for this also.

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