Horsepower is horsepower?
If that theory is true (in real circumstances), then a 385hp 6.7L Cummins diesel shouldn't spank a 381hp Toyota Tundra when both are tested 0-60 towing a 5740# boat. But it did. Must be the adva...
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Cummins 650 vs Cummins 800
The advantage the 800 has is not peak HP or torque at peak HP RPM. At peak HP, it is producing the same amount of torque as the 650 but because the 800's torque peaks at the same 1600 RPM as the 650, it will be producing more HP at every engine speed until it reaches peak HP RPM which is the same 350 HP at 2900 RPM for both engines.
The 850/385 will show a similar torque and power curve as the 800. While it produces 850 lb ft at 1600 RPM, it will be making only 722 lb ft at it's peak HP 2800 RPM.
The advantage the 800 has is not peak HP or torque at peak HP RPM. At peak HP, it is producing the same amount of torque as the 650 but because the 800's torque peaks at the same 1600 RPM as the 650, it will be producing more HP at every engine speed until it reaches peak HP RPM which is the same 350 HP at 2900 RPM for both engines.
The 850/385 will show a similar torque and power curve as the 800. While it produces 850 lb ft at 1600 RPM, it will be making only 722 lb ft at it's peak HP 2800 RPM.
