2021 Cummins 1075 lbft peak torque at 1356 rpm

RoyJ wrote:

4x4ord wrote:

RoyJ wrote:


Your point is valid IF hp was unchanged. With 430 hp, the torque at every given rpm will be higher compared to the 2020 model.

I wouldn’t be at all surprised to see the torque of the 2021 model at 1800 rpm at 1000 lbft the same as the 2020 model was. Often the torque curves follow a pretty straight line from peak torque rpm to peak hp rpm. So if the peak hp of 430 is still at 2800 rpm it will produce about 807 lbft of torque at 2800. On average the engine is gaining 18.6 lbft of torque per every 100 rpm that it drops from 2800. In other words it would seem reasonable to expect a torque rise of about 150 lbft (8 x 18.6) or about 957 lbft at 1800 rpm. So I’d be surprised to see it much higher than the 2020 model. This is what I’m really getting at is that I think this 2021 torque rating is more of a thing to gain boasting rights than to actually bring a more powerful engine into the game.

Let's look at it this way: 30hp on a 400hp engine is a 7.5% power increase, and so is 75 lb-ft on a 1000 lb-ft engine. I bet it was no coincidence; Cummins / Ram wanted a 7.5% increase overall. So I don't think think they cheated by simply shifting torque lower without gaining torque up top.

If we assume 2800 rpm peak power as you mentioned, then mathematically, at any given rpm the new engine has 7.5% higher torque and hp.

The engine simply extends the torque rise below 1800. I see it as a win-win. If they kept power at 400hp, then you're absolutely right in it being a marketing move.

Your thinking the torque is 1075 lbft from 1356 to 1800 rpm, then drops to 807 lbft by the time the engine hits 2800 rpm .... maybe, I hope your right but I'm not convinced. I wish they would publish torque curves.