Ram 1500 diesel review

bimbert84 wrote:

jus2shy wrote:

OK, Updated the spreadsheet.

Most excellent! The bottom two graphs are the ones that matter on the road. They should help everyone to see that delivered power is a varying function of vehicle speed, and that at speeds above 30mph or so, torque at the wheels is very similar for all three drivetrains.

Now all that remains is to add in the 3.0L Eco-diesel that prompted this thread. Except for very low speeds, it'll be significantly lower across the speed range. Why? Because it generates significantly less horsepower, which results in significantly less torque at the wheels.

-- Rob

I made a new sheet that compares the HEMI, Ecodiesel, and a theoretical Ecoboost mated to a 6R140 since the ratios are pretty close to the 6R80. HEMI and Ecodiesel have 3.92 rear end since I figure'd a high-revving diesel like the Ecodiesel (aka VM Motori A630) would get the higher gear set (it has a redline right at 5,000 rpm). And as you mentioned, it has less torque all around, But the cool thing is seeing how smooth the HEMI and the Ecodiesel put out power because of the 8-speed transmission. you don't get as much interruption of power and the engine can stay in its power band more easily. Beyond 8 or so speeds, I'd no longer see any benefit due to smooth power delivery.

Here's the spreadsheet: Spreadsheet link