Diesel is good stuff, makes gobs of torque but narrow power band. No air fuel regulation required, increase the power by pumping more fuel in until it just can’t burn it all.

The drawback used to be the narrow power band requiring lots of gears. For cars this has been eliminated because better materials science and the computer allows multi-gear automatic transmissions (5-6-7-8 and more). For the big trucks – still shifting gears a lot.

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