You can have HP with MUCH LESS torque. A diesel truck with with 325 HP and 525 pounds of torque will out pull a engine with 400 HP and 300 pounds of torque.
True, but if an engine is making 400HP and only 300Ft-lbs, it has to be spinning much higher RPM's, like a gasser. And comparing a gas motor to a diesel is like comparing apples to oranges. And for the sake of CUT talk, they are mostly ALL diesels and only spin to ~3000rpm MAX.
If you actually find the ratings on the tractor engines you will find that some rated with the same HP will have different torque ratings and that it the defining difference. It is a balance of the two but that is why the old heavy tractors of old with low HP but lots of torque can pull.
Right conclusion, wrong reason. For starters, the only way a engine (older tractor) can have lower HP and higher torque is if it is a slower spinning engine. These newer diesels make their peak power at ~2700-3000RPM. Old iron is ~2000-2300rpm. So two tractors with the same HP, but one of them rated at a lower RPM is going to have more torque. And a 30HP tractor of yesteryear can pull so much better than a 30HP today has a lot to do with the 38" tires and MUCH more weight. Compared to our current lightweights and smaller tires.
You can kid yourself all you want but it is applied physics. The manufactures stay away from this as to not to confuse people who don't understand and to also sell what seems to be more power when in reality it is not necessarily. RPM's is where the engine develops its relative power band. That is often the defining difference in reaching peak power on a 3 cylinder vs 4 cylinder engine and the TORQUE they will deliver.
On average the same HP engines on a Kubota will often exceed the torque ratings on other manufacturers. I have not done an exhaustive study on all of them but the ones I did research that is what came to me through the specs provided.
I disagree. All of these modern diesels are very comparable in similar HP sizes. As mentioned earlier, the only way for an engine "in general" to have more torque than another if the HP is the same, is for that engine to be a slower RPM engine. So basically waht you are sayine is that kubotas in general turn slower RPM's. And this is not always the case.
There is nothing bassackwards about any of this, you just need to understand engines, physics and the value of more torque.
Your statement I qouted WAS bassakwards. Simple physics. In your statement, you said "HP alone does not mean squat" Well, you CANNOT have HP alone. If you have HP, you have TQ. And then you said "without TQ, it is useless" Well, again, you simply cannot have HP without TQ. But a correct saying would be without HP, torque is useless. Because you can apply all the torque in the world, but if you arent creating HP, things are moving and getting done.
That 3130 will have more torque and less HP than the L3700 but would still out pull it. Take or leave it.
Simply wrong here as well. It would be near impossible for the 3130 to have more TQ unless there is some really strange things going on under the curve. Lets look at the facts. For starters, BOTH engines are rated @ 2700RPM MAX. The 3130 is a 3cyl, 91.5 CU IN, 31HP The L3700 is a 111.4 CU IN, 37HP. So how is it that the L3130 is making more torque??????Yes, more than likely the 3130 will outpull the L3700, but it is because it is about 600lbs heavier, NOT because it has more torque.
