well HP is a sum of Torque x RPM / 5252
Torque tells you how much thrust you have to get a load moving. But HP is how fast you can keep it moving.
Some companies are gambling thinking that a higher RPM diesel that has a broader (usable) RPM range is what'll sell.
Have you ever noticed all of the 1,000 ft/lbs Cummins are making 500 hp, that's because they can't be rev'd past 3K the Powerstrokes and Duramaxes can spin up to around 4K and although they don't make quite the same raw torque at the fly wheel as the cummins they make up for it with lower gears and more RPM's
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James Wiger
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