Certainly, diesel fuel pack more energy to begin with and diesel engine burns it slightly more efficiently, so the mileage is always better with the diesel.
In the not so distant past where transmissions had only 3 or 4 gears and gasengines run out of breath after 3500rpms diesel torque was the real king.
Today it is more about horsepower, ability of the powertrain to multiply input torque and apply it to the ground to move heavy load as well as ability of the engine to provide adequate power and torque over wide range of rpms.
In the case of my TV, diesel and gas versions are rated equally. When it comes to 0-60 acceleration I would outrun diesel ML any day of the week, just because 268hp is better than 210 or 240 hp, maximum uphill speed would be better as well. However, gas engine needs to spin much faster in order to make power. At 65 mph I use 5 or 6th gear, depending on wind and terrain and the tach is at 3000rpm at the 5th, while diesel would be traveling at 7th and turning about 2200 rpms or less.
Would I cho ose diesel if I have to buy a TV now? Probably yes.
Would I trade my TV in for a diesel version? Definitely no!
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Gene.
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'16 Passport 2670 BH
'11 Mercedes ML 350 gas, Reinforced OEM hitch receiver,1000 lb Eaz-Lift with custom welded head, 2 sway control bars, Prodigy P2 - ALL SETUP by Canam RV, Ontario, Canada
TST 507 trailer TPMS
'13 Passport 2650 BH- traded in
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