Check Their Fuel Saving Credentials

A Scania 460P Super pulling a single trailer and a Scania 560R Super pulling a fully loaded B-double set were tested by PowerTorque in order to check their fuel saving credentials. 

On a side note, for some reason the Swedish truck maker has swapped the the cab classification from before to after the horsepower number, but only on the 13 litre engines and below, not for the trucks with V8 engines, why?

On the 460P test drive out along the Calder Highway towards Bendigo and back, from Melbourne the truck held its 100km/h cruising speed quite well, dealing with the small rises using changes in strategy to maintain speed, and remain frugal on fuel.

check their fuel saving credentials

Coming into a steeper grade at 100km’h the speed started drifting down, holding onto overdrive at 1000rpm. Then it grabbed a gear to drop to the direct drive 12th gear. As the incline steepens the rpm levels got down to 1100, before the next change. As it was getting steeper the truck held well at 70km/h.

Even on the tougher gradient, the AMT still let rpm dip below 1200 before making the change down a cog. As it dropped into 10th gear, it settled at around 1450rpm and felt it would be able to hold onto that all of the way to the top. The engine and AMT got themselves into its sweet spot when doing about 56km/h in a fully loaded semi, on quite a steep grade.

check their fuel saving credentials

In terms of the the programming for this gearbox and the engine management etc, there are three levels to choose from: economy, normal and performance. Unlike in the smaller engines, Scania has found that the calibrations of these programs from Europe also work well in Australian conditions.

Back on the flatter sections the truck settles back down to cruising speed sitting between 1100 and 1200rpm For me, as as a driver, who started driving in the seventies, this sounds like the engine is not working but that’s just in my head. In fact, it is quite hard to hear the engine at all, this new engine is clearly quieter than its, already quiet, predecessor.

Later that day, hauling the B-double up the same grade with the 560R, the engine hit its straps at 50km/h at just over 1400 rpm. The variations in the grade brought the speed down to 45km/h, but there was no need to change down a cog.It was a smooth uneventful climb with a loaded B-double.


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