New Porsche Cayenne Diesel

New Porsche Cayenne Diesel

Author
Discussion

Cobnapint

8,643 posts

152 months

Wednesday 23rd May 2012
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lolbert said:
By way of comparison, I'm getting 28-30mpg on each tank. Mostly shortish runs. Car has done approx 7k miles to date
Is that taken off the PCM display, or briming/driving/briming and calculating?

Rrroro

400 posts

156 months

Wednesday 23rd May 2012
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My friendly local OPC leant me a diesel Cayenne over the weekend, as I said I was considering buying one as the family truck/utility vehicle. The family and I were totally blown away by it. I loved the handling and the performance (it felt seriously rapid and agile for a 2 ton diesel with only 235bhp), and the satnav was great. This being a demo it was obviously fully loaded and for me the reversing camera, power lift gate and panoramic roof are now must have's after having used them. Very close to ordering one but have decided to wait a year and check out the Macan first before deciding which to go for (when I buy it will be for the long term, intention is to buy new and use it til it dies).

Rocky Road

139 posts

145 months

Wednesday 23rd May 2012
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ted 191 said:
Couple of my read outs !
If I got 25.2 mpg covering 736 miles in 8 hours I would be very happy. Even happier if I could drive at an average 93 mph without worrying about my licence! WOW!



pikey

7,700 posts

285 months

Saturday 26th May 2012
quotequote all
I frequently get 38 - 39-ish on a run. I've seen as high as 45 (Bloody specs!) on that same journey and it's not been below 32. When my wife drives it she gets less out of a tank, so it is dependant on driving style.

Around town (stop/start, below 15mph) we get about 26ish.

The car's 2 years old and has done 25,000.


(Currently borrowing a Ford Territory and that's doing 12 around town and 18 on a run! You notice the difference!)

Cobnapint

8,643 posts

152 months

Saturday 26th May 2012
quotequote all
said:
I frequently get 38 - 39-ish on a run. I've seen as high as 45 (Bloody specs!) on that same journey and it's not been below 32. When my wife drives it she gets less out of a tank, so it is dependant on driving style.

Around town (stop/start, below 15mph) we get about 26ish.

The car's 2 years old and has done 25,000.


(Currently borrowing a Ford Territory and that's doing 12 around town and 18 on a run! You notice the difference!)
I bet if you brimmed it and calculated it, it would be less mpg. I'm begining to think the PCM screen is a little on the optimistic side, and the only reason the fuel guage needle makes relativlely slow progress is purely down to the 100 litre tank.
I'll let you know my mixed town driving results the next time I fill up.

Cobnapint

8,643 posts

152 months

Thursday 31st May 2012
quotequote all
Suspicion well and truly confirmed.

Just topped up after 240 miles of mainly running around the town, about 15% of which was stop start over just a couple of the just six miles I travel to work every day, and the rest just going easy on the throttle and keeping the 'present consumption' mpg figure around 33 for most of the time, only dipping down to about 29.1 on the VERY odd occassion.

The figures: The needle was just above the halfway mark before it took 46.71 litres to fill back up to its original fill point of 3 clicks of the nozzle auto shut-off.
In old money thats 10.275 gallons, which, my friends, is a measly 23.35 mpg.

Now I know what your're thinking - the engine wasn't up to full operating temperature; it must be the way you drive it, have your tyres got any air in them etc. etc.

Firstly, these things have thermal management which helps get the engine up to full op temp asap, and its not as though we've been having sub-zero temps lately.

And believe me, I've hardly touched the throttle. I took my time in it, just using the torque where necessary, and for the most part coasting where possible up to red traffic lights etc.

But the biggest let down of all is the PCM's idea of MPG. The overall figure shows 25.2 which isn't far off, but why the heck did the 'present' MPG figure on the PCM constantly tell a completely different story - it was nearly 50% out.
And although I didn't buy the Diesel Cayenne purely on economic grounds, I would have expected to see something nearer the 30 mark tbh.

My previous C4S Cab never went much above 21 mpg around the town, and presuming Porsche uses the same metering system in that as they do in the Cayenne, I dread to think what it was really doing.

Anyway, off on a run to the coast this weekend so I'll give you those figures when I get back.

Be interested to hear some more PCM vs actual mpg figures from other owners of this vehicle.
Thanks in advance.


lolbert

97 posts

151 months

Thursday 31st May 2012
quotequote all
Cobnapint said:
Is that taken off the PCM display, or briming/driving/briming and calculating?
PCM display

pikey

7,700 posts

285 months

Friday 1st June 2012
quotequote all
Cobnapint said:
Stuff
I've not used the 'constant' setting as mine doesn't (appear to) have one (I have a July 2010 car) so am going on the PCM reading for average and haven't done a calculation like you have. But my reading/estimate of approx 26 (Average consumption) around town would be near your 25.2 calculated actuals, which would say to me that the PCM calculation is about right.

Anyway regarding the general 'feel' of how well the car does, I get this from how much go-go juice I stick in it. When the light comes on I fill it up, so lets say there's about 10 litres left in the 100 litre tank at that point... With my wife driving soley around town, this is about 500 miles - so near your calculated 25.2mpg and my estimated 26mpg. With me doing the same, about 600 - so about 30mpg. However, generally the car is used for a mixture of nursery / shopping runs and long distances and we normally get (this is over 25,000miles / 2 years usage) around 700 miles between fillups - that's about 35mpg. For a 2 ton monster that's quick, it's what I regard as 'good'.

Now, regarding more interesting things - on the Autobahn the car will sit at 140mph with incredible stability... as if it's the most normal thing in the world. On the Nurburgring, it is gobsmacking - extremely smooth, totally predictable and very, very fast (I'm convinced Porsche have something in it to identify where it is and release more power!). In snowy conditions on a 15degree slope at -18 it cruises up beautifully and in total control. And in a few months, once it's been shipped, I can tell you how it performs in Australian heat of 40 celsius.. but I bet it will be as good as everything else so far!

It is an absolutely brilliant machine, that does so much so well. Its fuel consumption is what it is, but at the end of the day its very impressive!

smile

Ben

PS. When I first got the car, I was taking note of this stuff and remembered I once got well over 800 miles from a tank (all motorway).

Helicopter123

8,831 posts

157 months

Friday 1st June 2012
quotequote all
said:
Cobnapint said:
Stuff
I've not used the 'constant' setting as mine doesn't (appear to) have one (I have a July 2010 car) so am going on the PCM reading for average and haven't done a calculation like you have. But my reading/estimate of approx 26 (Average consumption) around town would be near your 25.2 calculated actuals, which would say to me that the PCM calculation is about right.

Anyway regarding the general 'feel' of how well the car does, I get this from how much go-go juice I stick in it. When the light comes on I fill it up, so lets say there's about 10 litres left in the 100 litre tank at that point... With my wife driving soley around town, this is about 500 miles - so near your calculated 25.2mpg and my estimated 26mpg. With me doing the same, about 600 - so about 30mpg. However, generally the car is used for a mixture of nursery / shopping runs and long distances and we normally get (this is over 25,000miles / 2 years usage) around 700 miles between fillups - that's about 35mpg. For a 2 ton monster that's quick, it's what I regard as 'good'.

Now, regarding more interesting things - on the Autobahn the car will sit at 140mph with incredible stability... as if it's the most normal thing in the world. On the Nurburgring, it is gobsmacking - extremely smooth, totally predictable and very, very fast (I'm convinced Porsche have something in it to identify where it is and release more power!). In snowy conditions on a 15degree slope at -18 it cruises up beautifully and in total control. And in a few months, once it's been shipped, I can tell you how it performs in Australian heat of 40 celsius.. but I bet it will be as good as everything else so far!

It is an absolutely brilliant machine, that does so much so well. Its fuel consumption is what it is, but at the end of the day its very impressive!

smile

Ben

PS. When I first got the car, I was taking note of this stuff and remembered I once got well over 800 miles from a tank (all motorway).
This - best all round car in the world? I think so.

pikey

7,700 posts

285 months

Friday 1st June 2012
quotequote all
I forgot comfortable and luxurious.

And of course, an absolute delight to drive.

sajafzal

392 posts

154 months

Friday 1st June 2012
quotequote all
Absolutely correct, since I have had mine its beyond what I thought it would be, a comfortable cruiser and a point & squirt vehicle all rolled into one, sublime.

Any how I go on my run to Lake district tomorrow that will give me an idea of what the car will do on motorways, all I can say until now is its better than my previous X5 in most ways except for space

On with another option

Adaptive sports seats with comfort memory package
Light comfort



Unbelievably Comfortable, I am not the slimmest person but these seats fit like a glove, which is handy considering the speeds you can carry in this car whilst cornering, and the pattern is a bonus I really do like the design of the seats, the rear seats, left & right are contoured to be individual seats with the third seat smaller but enough for my 9 year old to fit comfortably in. The term you sit in the car rather than on it springs to mind whilst in this seat



Against

Not sure how the bolsters will fair after a period of time but time will tell.



991fan

245 posts

162 months

Friday 1st June 2012
quotequote all
sajafzal said:
On with options


21-inch 911 Turbo II wheel

For me wheel’s make a car and personally the Cayenne needs large wheels so my choice was either the 21” Sport design Wheel or the Turbo II wheel, I decided on the Turbo II alloy for its sporty look and above all else the ease that you can clean the wheel with.

Wheels in spray booth


Against: I did not like the standard grey Centre’s and wheel blacks so requested Porsche Reading to paint them the same as the body colour, for me these now look perfect, to aid cleaning, as I like to have my car clean I sealed the wheels with a Gtechniq sealant

Finished




Saj
Nice, much better than the grey centres, can I ask did they mask them or did they paint them all black and machine the alloy parts? Thanks

sajafzal

392 posts

154 months

Friday 1st June 2012
quotequote all
991fan said:
Nice, much better than the grey centres, can I ask did they mask them or did they paint them all black and machine the alloy parts? Thanks
Actually not sure but looking at the images I think they masked the silver bits up, but not sure, but the quality of the finish is stunning, but I would say that !!

Saj

991fan

245 posts

162 months

Friday 1st June 2012
quotequote all
sajafzal said:
991fan said:
Nice, much better than the grey centres, can I ask did they mask them or did they paint them all black and machine the alloy parts? Thanks
Actually not sure but looking at the images I think they masked the silver bits up, but not sure, but the quality of the finish is stunning, but I would say that !!

Saj
They do look great, but thats one 'ell of a masking job, but the pictures do suggest that is the case.

Rocky Road

139 posts

145 months

Friday 1st June 2012
quotequote all
Cobnapint said:
Suspicion well and truly confirmed.

Just topped up after 240 miles of mainly running around the town, about 15% of which was stop start over just a couple of the just six miles I travel to work every day, and the rest just going easy on the throttle and keeping the 'present consumption' mpg figure around 33 for most of the time, only dipping down to about 29.1 on the VERY odd occassion.

The figures: The needle was just above the halfway mark before it took 46.71 litres to fill back up to its original fill point of 3 clicks of the nozzle auto shut-off.
In old money thats 10.275 gallons, which, my friends, is a measly 23.35 mpg.

Now I know what your're thinking - the engine wasn't up to full operating temperature; it must be the way you drive it, have your tyres got any air in them etc. etc.

Firstly, these things have thermal management which helps get the engine up to full op temp asap, and its not as though we've been having sub-zero temps lately.

And believe me, I've hardly touched the throttle. I took my time in it, just using the torque where necessary, and for the most part coasting where possible up to red traffic lights etc.

But the biggest let down of all is the PCM's idea of MPG. The overall figure shows 25.2 which isn't far off, but why the heck did the 'present' MPG figure on the PCM constantly tell a completely different story - it was nearly 50% out.
And although I didn't buy the Diesel Cayenne purely on economic grounds, I would have expected to see something nearer the 30 mark tbh.

My previous C4S Cab never went much above 21 mpg around the town, and presuming Porsche uses the same metering system in that as they do in the Cayenne, I dread to think what it was really doing.

Anyway, off on a run to the coast this weekend so I'll give you those figures when I get back.

Be interested to hear some more PCM vs actual mpg figures from other owners of this vehicle.
Thanks in advance.
Disappointing mpg.… I was hoping for better. I do think it takes time for an engine to loosen though. My current diesel engined Audi took about 10,000 miles for mpg to optimise. TBH it's still less than I was led to believe but a whole lot better than when it was new.

I’m always happy If fuel consumption is good. If it’s disappointing but I love the car I quietly forget about it.

Geneve

3,870 posts

220 months

Friday 1st June 2012
quotequote all
30-35 mpg should be normal, without really trying. 35-40 mpg is possible but takes a lot more effort.

Cobnapint

8,643 posts

152 months

Wednesday 6th June 2012
quotequote all
Geneve said:
30-35 mpg should be normal, without really trying. 35-40 mpg is possible but takes a lot more effort.
Ok, just back from a long Jubilee-weekend 305 mile round trip to the coast, which consisted of just the journey there and back on mainly dual carriageway with the cruise set at 79, and partly country 'B' roads at around 45, and all the while trying to make a constant effort not to floor the throttle (apart, that is, from two wonderful country lane overtakes, who's passing ability, even as an ex-997.2 owner, surprised even me).

The PCM present consumption always hovered around 37.2mpg and the overall was showing 36.2mpg on our return, at which point I brimmed it and fired up the calculator which proceeded to tell us we had actually returned 35.22mpg.

Now thats more like it! Ok, its nowhere near the 'official' government figures (which are in the headlines alot more lately as being so inaccurate as to be a complete waste of time), but considering the sublime way in which this splendid two ton machine got us (and our gear) there and back again in total comfort - I'm not complaining anymore.

sajafzal

392 posts

154 months

Wednesday 6th June 2012
quotequote all
Looks like there where a few Cayennes out for the long weekend.

Ok this is the last a talk about fuel economy as the car is about so much more, really is an outstanding vehicle. Driving through the twisty bits in sport mode the Cayenne just left me speechless, exceptional

I filled up before leaving West london 98 litres, drove down to the Lakes with some heavy traffic around Birmingham and a lot of stop start traffic for about 7 miles on the M6 and heres what the Comp. was saying at the lakes



Saj


Rocky Road

139 posts

145 months

Thursday 7th June 2012
quotequote all
Quite good results which should get better as engines loosen up. If I found myself only returning an average mpg of around mid 20s, I would question why I had bought a diesel.

Thanks for checking and reporting on the mpg's

Saj - not exactly sure what comes with the Light Comfort Package but have you found it useful.

TB993tt

2,033 posts

242 months

Thursday 7th June 2012
quotequote all
Rocky Road said:
Quite good results which should get better as engines loosen up. If I found myself only returning an average mpg of around mid 20s, I would question why I had bought a diesel.
Problem is the average mpg function resets itself for each journey (AFAIK, please someone correct me if I'm wrong) so you tend to look at the long "good" mpg journeys not all the little bad ones.
I did a tank fill up calculation and I'm afraid it was 28mpg which included varied driving, certainly not caning it so I would say this would be a accurate average mpg, cold starts and traffic really hammer the mpg in all cars.

Whilst the new CD is a good car some of these gushing comments are a bit ridiculous, this is a Porsche forum, the Cayenne is a 2000kg+ 4WD truck and feels like one, yes Porsche have done a good job and everyone is proud of their purchase but go easy on the superlatives, this is the donkey of the Porsche range wobble