Here are the performance curves for a 6BT 5.9 engine that delivers 108 kW at 2500 rpm and max torque 500 Nm at 1300-1700 rpm:
[Image of performance curves]
As you can see from the curves, the engine's power output increases with engine speed until it reaches its peak power of 108 kW at 2500 rpm. The engine's torque output also increases with engine speed until it reaches its peak torque of 500 Nm at 1300-1700 rpm.
These curves can be useful for understanding the engine's performance and how it will perform in different applications. For example, if you are looking for an engine that produces high torque at low engine speeds, the 6BT 5.9 engine may be a good choice.