It is me trying to understand in a theoretical sense how torque and HP relate to each other and which is more important for tractors.
Torque at rated engine speed (2500 RPM) ft/lb (N/m)
JD 3032E 62.7 (85.0)
JD 3038E 62.7 (85.0)
So the question of whether the 3038E's extra HP is useful depends upon what the engine PTO speed is right?
If you run the engine of both tractors at close to 2500 RPM to get 540 PTO speed then the 3032E has exactly the same torque as the 3038E. If on the other hand the engine's run at closer to 1680 RPM to get 540 PTO speed then the 3038E has more torque and therefore an advantage.
I think that makes sense?
Okay, that makes sense. And in that case, I'd say the HP is the more important number to watch. As you can never (easily) make more of it. But torque on the other had can be gained by gearing. I think it is safe to assume that the tractor has the right gearing to do the work it was designed to. IE: Every tractor I have owned had pleanty of gearing (torque) to spin the wheels in about all conditions. Just maybe not in high range all the time.
The tractor with the most HP will do the work quicker.
We can also do a little reverse figuring here also:
The 3038 is rated at 36.3HP @2500rpm That would make the torque @ 2500rpm 76.25
The 3032 is rated at 31.0HP @2400rpm That would make the torque @ 2400rpm 67.8
To add even more to this puzzle, the 36hp 3038 is 6ci SMALLER in displacement:confused3: Why the difference? How are they getting that much less HP out of the bigger 3032 engine?? Same comp ratio of 19:1, and they even share the same stroke length with the 3032 bore being bigger? And I dont see the extra 100 rpm's causing that much difference in HP, cause after all, at 1680rpm, the smaller motor makes more torque????? Could it be just de-tuned that much? I see a big potential in the 3032 for upping the HP:D
Good answer above....!
The answer specifically to the 3032 jd and 3038e is that the 32 is more cubes natural aspiration
The 3038 is less cubes and turbo charged....
But to answer the op question... If more horse is available
Get it.. If all things else are equal..... But as we see here.... All other things are never equal...:)
Size always matters