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HDi fun · 18-02-2008, 10:08 PM

2200rpm in a V6 petrol is way below peak efficiency, hence the poor return on fuel. The power band is also the most efficient in terms of fuel band.

My car is geared high - 3000rpm is 97mph in fifth (diesel, so revs are limited a bit). But there's no point in using 5th at 45 mph. Unless you really want to eat fuel, that is. There's no turbo pressure to speak of, so the ECU reverts to good ole' pile the diesel in option to keep it going at all. Hence, sod all miles per gallon if you drive awalking pace in high gears.

18-02-2008, 10:08 PM	#17 (permalink)
HDi fun Moderator The Torque Meister Car: Peugeot 406 Join Date: Apr 2006 Location: SOUTH EAST Posts: 1,830	Re: What is more economical. 2200rpm in a V6 petrol is way below peak efficiency, hence the poor return on fuel. The power band is also the most efficient in terms of fuel band. My car is geared high - 3000rpm is 97mph in fifth (diesel, so revs are limited a bit). But there's no point in using 5th at 45 mph. Unless you really want to eat fuel, that is. There's no turbo pressure to speak of, so the ECU reverts to good ole' pile the diesel in option to keep it going at all. Hence, sod all miles per gallon if you drive awalking pace in high gears.