[ukadamwest]

As an aside a supercharger will work better at higher altitudes without the loss associated with gain in height due to the decreased pressure.

It's why higher performance piston aircraft use superchargers.

 

[Datatek]

As an aside a supercharger will work better at higher altitudes without the loss associated with gain in height due to the decreased pressure.

It's why higher performance piston aircraft use superchargers.

Surely a turbo on the diesel would give the same benefit? Certainly some aero engines have used turbo's.
With the MAF & MAP sensors plus variable wastegates and turbo vanes on the 4.4 V8 diesel, compensation for altitude is easy.

 

[300bhp/ton]

The supercharged gives 20 or 19 OFFICIAL solo so you'd be lucky to get that solo real life. Then put a trailer on the back. Just being realistic.

Just because it is supercharged, doesn't mean it'll use twice the fuel. When towing you'll have more low end grunt due to it being a PD blower, so, for a heavy load it might be more economical, as you won't need to drive it as hard as a n.a. V8.

 

[goonarmy]

Just because it is supercharged, doesn't mean it'll use twice the fuel. When towing you'll have more low end grunt due to it being a PD blower, so, for a heavy load it might be more economical, as you won't need to drive it as hard as a n.a. V8.

I understand that just experience tells me official mpg figures are rarelly achieved. They are always optimistic achieved on a rolling road under favourable lab conditions

 

[300bhp/ton]

NEDC mpg figures are done on a simulation. Personally I don't agree with the simulation, but it is generally perfectly possible to attain the figures or even exceed them for most non hybrid vehicles.