Unless more displacement means a greater torque to horsepower ratio, in conjuction with a lower redline and more engine spool-up difficulty.
Those little turbo 4 guys with no torque and 10,000 RPM got it figured out, if you ask me...
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1990 D-250 Regular Cab: Full power screw; stout TC and A518 w/ manual valve body; ratchet shifter; piston LP; Ramcharger tank; manual off; computer-programmable 40 GPH water/meth fumigation; gauges