When these guys give these consumption figures do they factor in the roof rack.....with x, y and z on top of the roof..... ? With the wind resistant factor really coming into play at around 110 km/h they will have worse consumption on the open road than in slower town driving. I have seen with my Isuzu (Diesel) that I get better consumption in town than on the high way. With the KZ, I stopped keeping record (don't do long trips at the moment).
Reading a bitfurther down the thread, one guy mentioned his consumption had improved and he got excellent figures with a fully laden LC70 including roofrack and gear on the roof.
Thumbs up, so far!
-F_D
White Fang: 1999 2.7i DC Raider 4x4 Bull Dog: 1987 4Y-EFI 2.2 DC 4x4 Pra Dog: 1998 Prado VX 3.4 Hound Dog: 2000 2.7i SC 4x4
One Staffie, One Jack Russell, One Ring Neck Screecher, 17 Fish of questionable heritage
I've heard these claims too. I can't substantiate them, as I could never measure my economy over the two situations.
Food for thought though.
Around town, in a diesel you rarely ever using more than 2000rpm. Diesel consumption is directly related to rpm. On the open road however, you travel in a 2500 - 3000rpm band. This could be one of the possible explanations.
IOW, if you traveled on the open road say for 100km at 2000rpm, your diesel fuel consuption would be less than doing the same distance at say 3000rpm.
Possible another factor to consider...... and I might add that this is pretty much hear say.
On a petrol engine, if you labour the engine, and push your foot flat, the amount of fuel increase to that of an open throttle, even though your engine doesn't respond immeadatly. All excess unburt fuel get passed through the exhast system and is wasted. Only once the revs increase with the amount of unburnt (wasted) fuel decrease.
With a diesel on the other hand. If you pump is set correctly, the amoung of fuel used is relative to the engine rpm rather than how flat you foot is.
This is a very simple explaination, and obviously differs from brands and circumstances.
Can this explain why in town, petrol engines are are often heavier than on the open road? (the amount of unburnt fuel by the constant acceleration)
Can this also explain why petrol engines are hevier when towing? (the amount of unburnt fuel by accelerating more than the enigine is burning)
My 2cents worth, but will be watching this thread with great enthusiasm. What do the pro's say?
quote="xuliH"]engine revolutions make the difference[/quote]
I agree. My 2.7 was heavy on fuel if over 3000 rpm (abought 120km/h) but this motor like being revved before you got the power. I assume that is why the 2.7 VVTI motor is a bit lighter on juice that the older 2.7's.
My first 5k was not so hot (but still better than expected), but the last few tanks have been awesome, even this weekend doing 140+ on the open road with family and weekend gear I got 12l/100 exactly. So I guess it does improve over time and as the mechanics runs in?
have just come back from our first trip with our new 70 SW to namibia.We,especially my wife liked the performance very much.
Our consumption was:
15-17l/100km @ 120-140km/h
14-15l/100km @ 110-120km/h
11-12l/100km on gravel up to 100km/h
10-11l/100km in town
Can anybody share their experience please.
I think wind resistance might be the cause of this phenomenon.
Only Dead Fish Go With The Flow!
1999 Hilux 2.7i 4x4 Raider DC with 3.4 Prado V6. Rear diff-lock, Bull Bar and rock sliders, 31" Cooper ST Maxx, Snorkel, Alu-Canopy, VHF Motorolla radio, West Coast Rust, Mikem Suspension, Ball Joint Spacers in front and Mikem extended shackles at the rear, 25watt LED Spots
