Diesel vs gas......................

blt2ski wrote:
dubdub07,
So if you have a high HP/low torque motor, but the correct gearing to multiply the torque so it is equal to a high HP/torque motor, they will have the same potential.

There is more to it than just HP and torque figures.

Marty

I've owned both an 07 Hemi and an 07 Cummins (6.7)

I've pulled the same trailer with both - so yes they both work.

Argue all you guys want - listed here are real world results.

My comparison of the 6.7 (A) and Hemi(B)- with trailer attached:
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A - Can pull forward (from stop) on a steep uphill slope at idle.
B - Must race engine to get enough torque out of the engine/torque converter to pull forward on hill - TAKES TIME/COORDINATION - may actually roll backwards some if not done quickly enough.
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A - Can back into spots (even up hill) in idle - no goosing required - tranny stays cool as a cucumber.
B - Once again must race engine - TRANSMISSION HEATS QUICKLY.
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A - Can roll down the highway pulling 70mph in 6th gear all day long - small grades require no gear change, just varying boost. VERY QUIET rolling down the road in 6th - can just barely hear the turbo spool(if all else is quiet, radio off). 5th gear will take care of any extreme hills/head winds - still quiet.
B - Can roll down the highway at 60 mph in 5th if the road is flat and there are no head winds - QUIET. For 70 mph must be in 4th or even 3rd when hills/head winds are present. In 4th loud in 3rd VERY LOUD and lots of powertrain vibration transmitted to the cab.
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A - With a 34 gallon tank and averaging 12 MPG towing - I can go 408 miles before fueling is required.
B - With a 34 gallon tank and averaging 6 MPG towing could only go between 204 miles before fueling.
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A - 70 MPH in 4th gear @ 3000 RPM all the way up to 11,000 ft I70W from Denver to Eisenhower tunner (and back). Engine at 220F and tranny at 190F.
B - Never tried it - would have been much slower due to altitude - would have been a 2nd gear crawl with torque converter unlocked.
This trip is why I bought the CUMMINS.
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A - 60 MPH down I70 from Eisenhower tunnel to Denver - never touched the brakes because the Exhaust brake feathered and maintained the cruise control setting - absolutely amazing performance here.
B - Would have been much slower and scary.
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A - 300,000 mile average rebuild
B - ??
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I loved the Hemi as a runabout, but when towing the Cummins IS SUPERIOR in every measure except initial cost and of course replacement cost.

Enjoy!