I know this is a tad off topic, so it might need to have it's own thread, I'll let the moderators decide ....
Even in the ICE powered heavy vehicles, the Fuso 8.6ltr diesel 6 sp manual didn't hold a candle to the Ford petrol/LPG 6.8 ltr V10 4 sp auto (3sp + OD and lock up converter)
Even though this one is 3 ft longer and weighs 3 tonne more, plus the added weight of the trailer and MG4 51 bring it up to 12.5 tonne, the hill climbing ability is chalk and cheese.
The diesel, even with 2 ltrs more engine capacity and two addition gear ratios along with all up being 5.5 tonne lighter, required looking into the near future to determine which gear to be in at the base of the hill, get it wrong and you either crawled up in 1 gear too low so had to avoid over revving, or lost two gears if you where in a gear too high, once the torque was lost, it required a down shift of two gears to allow the motor to spin up as the motorhome rapidly slowed .....
The Winnie will approach the same hill in overdrive lock up converter, pull up the hill until the revs start to die back excessively, the release the converter lock up and hold the same speed, or even accelerate up the hill.
Just love the performance, 2 kms/ltr takes the shine off a bit, so I'd love to convert it to either hybrid or full EV, that ability the 3 phase electric motor combined with a VFD inverter to produce huge torque through most of the range would suit this Winnie down to the ground, the V10 6.8 ltrs and associated radiator and fuel tank gives plenty of weight available to replace with an electric motor and batteries ........
T1 Terry