I'm trying to find the required Newton or Nm of torque to move 6000 kg up a grade at 100 km/h.

I'm trying to work out the closest suited engine platform to do the job while been efficient, durable,cost effective and most of all required torque.

* Mass: 6000 kg
* Speed: 27.77 m/s = 100 km/h
* Grade: 7° = 12%
* Wheel size: 830 mm