Setting cruise control to hoon mode

Graeme is on the money with the CC behaviour on 6 speed D4's. to maintain speed going up hill increase the cruise speed by up to 6kph and reduce back to preferred speed just before cresting. To help prevent overrun on down hill runs, cancel cruise altogether and just hit the resume at the bottom. It does not matter how you play with the gears on the way up the hill, it will not maintain speed - you will just get a higher revving engine.

My D4 was well and truly trained to be responsive, zero lag and very quick off the mark. As said, it is all in the programming. In my opinion the new D4's are not that much better, I had the use of a MY15 D4 several times for upto 3 weeks at a time and found the behaviour to be the same. Disappointingly, my '16 RRS is similar although not as bad and it will make its way back to the set speed.

I don't have any issues maintaining speed uphill

If you are having uphill issues what is wrong with helping the mojo out with the loud pedal???? They are smart vehicles,but not smart enough to look ahead and see that hill coming;););););)
Sure you get a cruise overide warning,but its more generous than the D2 cuise.The odd time Ive overtaken a truck on cruise it still remains live after the manouver with a blast of help,a D2 gives you a limited overide and would quite often have to re-set the cruise.
Simply help it out then relax the foot;););););).I havent had to do it,Im quite happy with mine.
Andrew

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Originally Posted by LandyAndy

If you are having uphill issues what is wrong with helping the mojo out with the loud pedal???? They are smart vehicles,but not smart enough to look ahead and see that hill coming;););););)

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I think that the fact is, you shouldn't have to help it. The fact that my MY03 car has a much more refined and all round better cruise control programming than my MY10 vehicle (that had a showroom price of approximately $35,000 more). I am not sure of the technical side of things, but I am guessing the LR cruise doesn't poll the speed as often as the Saab one, which has millisecond reaction time to any change in terrain, and possibly the fact that LR may have programmed the base driving style for economy ie. Let speed drop off by 5km/h before increasing engine load. Still doesn't explain the fact it allows 6-8km/h over speed before cutting fuel - in the other car, as a crest starts to level off, the throttle is backed off so smoothly until over the other side where it closes the throttle completely if you even slightly go over set speed.
I have modified my driving with cruise on the D4 so that I click + at the bottom, click - as I near the top and if the decline is steep, I hit cancel until I feel the need for cruise again. At least the controls are on the steering wheel, where as the other car they are on the indicator stalk, where it would be a real pain if I had to drive the same way.

I dont think the price has anything to do with it,its the weight of the vehicles.Tow a trailer with the SAAB to the same curb weight and compare.We have heavy vehicles.
Perhaps the technology has improved in leaps and bounds with the 8 speed????
I really cant complain about mine.
Andrew

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Originally Posted by LandyAndy

I dont think the price has anything to do with it,its the weight of the vehicles.Tow a trailer with the SAAB to the same curb weight and compare.We have heavy vehicles.
Perhaps the technology has improved in leaps and bounds with the 8 speed????
I really cant complain about mine.
Andrew

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I doubt the weight has anything to do with it as the LR has bucket loads (about 300nm) more torque and a much better gearbox to boot, with only being 900kg heavier. The fact the car accelerates at the crest where if weight was the issue should mean the Saab would be worse (being lighter).

It must then be a 6 speed issue,I dont have the same issue.It would be interesting if you could test drive an 8 speeder up the same terrain.Waste a salesmans time just for the experiment:cool::cool::cool::cool::cool:
Andrew

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Originally Posted by LandyAndy

It must then be a 6 speed issue,I dont have the same issue.It would be interesting if you could test drive an 8 speeder up the same terrain.Waste a salesmans time just for the experiment:cool::cool::cool::cool::cool:
Andrew

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I would love to, except I would then probably sell myself on the nearest corner so I could buy one afterwards. :p:p
I would hope that the later models would have a better system, because it is probably my only real disappointment with the vehicle, but then I was warned about the cruise before bought it.

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Originally Posted by SBD4

.... It does not matter how you play with the gears on the way up the hill, it will not maintain speed - you will just get a higher revving engine ..... In my opinion the new D4's are not that much better, I had the use of a MY15 D4 several times for up to 3 weeks at a time and found the behaviour to be the same. Disappointingly, my '16 RRS is similar although not as bad and it will make its way back to the set speed.

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Originally Posted by Grentarc

I would hope that the later models would have a better system, because it is probably my only real disappointment with the vehicle

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I find the 8 speed (MY14) very similar to what Justin and Sean describe, although I have not driven an older one so can't directly compare.
It's more pronounced when towing the camper and perhaps not as bad when cresting as Justin's description. It feels like programming lag rather than an actual struggle.

My previous experience was with Mazda cruise control (car not 4WD) and it was similar to the Saab, more accurate/responsive than the D4, drop gears sooner to maintain speed on uphills, etc.

It doesn't really bother me too much, I will override it as required but it was a surprise and something to get used to. You can leave it and it will return to the set speed but how long it takes depends on the terrain and I find it annoying enough sometimes to intervene.

Scott

I have no doubt at all that LR have deliberately set up the cruise control to be mild in order to get best fuel usage. A cruise control is dead simple, especially on a throttle-by-wire system. It is simply up to the programmer to decide how much 'loud pedal' he will allow in response to the cruise control.

My hope was that there was an option of different cruise settings within the existing code, selectable via the OBD2 port, but it seems that is not the case. Presumably in response to grumbles, in the later models they have allowed a bit stronger throttle response to a drop in speed.