Speed vs fuel consumption

The most efficient speed of your vehicle is an interesting parameter to establish and know. The instant fuel figures on modern cars help heaps with this.
Whilst I normally travel on the speed limit, I for one normally try to drive using conserve momentum using the minimum require throttle to maintain the desired speed.

Its not just frugal's who do this, this conservation of momentum is at the core of all good driving be it heavy haulage, F1, MotoGP, commuting, highway, chauffeuring


Its not about just stomping of the go pedal it about using energy (aka momentum) efficiently. Be it making correct choices about accelerations, hills, corners all whilst considering what is ahead.

Pleasure is not the right word but there is a satisfaction in driving it right.

Clive

It can get even more nitpicky in city driving. UPS in the USA, has programmed the GPS units in their vehicles to mostly turn right and rarely left when city driving. From memory it was because going around the block is statistically quicker than trying to turn against the traffic. I'm sure it will be online somewhere.

Only fuel test versus speed I did in the 101 was a 300KM trip - traveled there at a sedate and easy 85KPM and averaged 21's. On the way back, pulled the overdrive in and cruised at 100 to 105KPH - averaged 28's doing that... [biggrin]

Did someone say house brick???

Last time we were up near Alice I checked the numbers in the D1 at 100 and again at 130 a few times. Fully laden with a bunch of stuff on the roof. 55% throttle at 130 and around 25% at 100. Only wound it up to 130 to say I'd done it and to see how she'd go really. Highlights the non linear relationship pretty well though. The fuel burn at 130 would have been horrendous. Certainly the wind noise was...

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Originally Posted by cripesamighty

It can get even more nitpicky in city driving. UPS in the USA, has programmed the GPS units in their vehicles to mostly turn right and rarely left when city driving. From memory it was because going around the block is statistically quicker than trying to turn against the traffic. I'm sure it will be online somewhere.

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ive seen this before. tried it a few times too, definitely true.

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Originally Posted by cripesamighty

It can get even more nitpicky in city driving. UPS in the USA, has programmed the GPS units in their vehicles to mostly turn right and rarely left when city driving. From memory it was because going around the block is statistically quicker than trying to turn against the traffic. I'm sure it will be online somewhere.

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I use a similar strategy in the cities, make a quick left to flow with traffic and then a U-turn on the next traffic island to flip the other direction if required.

Mind you, I have a car at the house in Hua-Hin, Thailand and if you’re comfortable driving there you can do anything! Over there it’s guidelines rather than rules [emoji38]

I wouldnt have included Moto Gp in that list,, unless you are very old! These days its how quickly you can get the bike upright to accelerate,, hard brakes,turn and shoot, not much Hailwooding done... [biggrin]

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Originally Posted by Pedro_The_Swift

I wouldnt have included Moto Gp in that list,, unless you are very old! These days its how quickly you can get the bike upright to accelerate,, hard brakes,turn and shoot, not much Hailwooding done... [biggrin]

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Yamaha's are still all about corner speed and managing edge grip. Quatararo seems to be mastering that quite well while still 500rpm down on the factory bikes. [emoji16]

I've just notched up 150,000 km on my 2015 D4 TDV6, about half of that towing a 2,500 kg boat. I drive at pretty much the same speed with or without the boat.

I average about 10 L/100 km without the boat and 17.5 L/km with the boat on.

[QUOTE=Barraman;2941843]I've just notched up 150,000 km on my 2015 D4 TDV6, about half of that towing a 2,500 kg boat. I drive at pretty much the same speed with or without the boat.

I average about 10 L/100 km without the boat and 17.5 L/km with the boat on.[/QUOTE

Try slowing down when towing the boat, You will be amazed how much better the fuel consumption will be and your D4 will Love you for it[thumbsupbig]