Fuel Consumption XC60 D5 and D3

[darbs]

Originally Posted by Pat Mustard

Here is a comparison from the Volvo UK website. The D3 AWD is on the left and D5 AWD on the right. Comparing the performance v fuel consumption, something doesn't add up.

you're right. the figures on the right are not the official figures. the official combined figure for a D5 manual is 49.6 not 50.4. this could be reported to ASA: http://www.asa.org.uk/. although might be best to report to volvo uk first.

[wimorrison]

Originally Posted by darbs

you're right. the figures on the right are not the official figures. the official combined figure for a D5 manual is 49.6 not 50.4. this could be reported to ASA: http://www.asa.org.uk/. although might be best to report to volvo uk first.

Hardly constitutes a claim for 'false or misleading' advertising though does it?

[darbs]

Originally Posted by wimorrison

Hardly constitutes a claim for 'false or misleading' advertising though does it?

what makes you suggest that? do you think it's not a great enough exaggeration by volvo, or that it's not prominent enough as part of their marketing? or maybe both?

[wimorrison]

Originally Posted by darbs

what makes you suggest that? do you think it's not a great enough exaggeration by volvo, or that it's not prominent enough as part of their marketing? or maybe both?

The fact that it is only a difference of 0.8 which equates to 1.5% exaggeration - and this exaggeration is in a test figure that will never be achieved in reality, therefore I contend that this difference is inconsequential.

[darbs]

Originally Posted by wimorrison

The fact that it is only a difference of 0.8 which equates to 1.5% exaggeration - and this exaggeration is in a test figure that will never be achieved in reality, therefore I contend that this difference is inconsequential.

seems logical.

[volvorocks]

Originally Posted by DEFRO

The reason why the MY12 should return a better mpg than the MY11 cannot be only attributed to the start/stop function, there are a number of small improvements that theoretically/hopefully should have a positive effect in real life driving (probably too early to quantify).

Hi Defro

Hope you are good and well and have enjoyed the glorious sunny weekend?

There may be "small" improvements although I opine these amount to little.

Official fuel improvements I do believe are down to just the stop start...which in real life operates only about 40% of the time...so the MY12 is very very very slightly better than the non stop start MY11 or MY 11.5

MY12 has a tiny bit more power than the MY11 or MY11.5 (212 or 215 or thereabout compared to 202-205 or thereabout)

Real life driving..say on motorway - absolutely no difference...in town....probably absolutely no difference as stop start only works about 40% of the time)...due to load on the battery - has the car travelled far enough for the battery to be charged a good amount - doubt it......

Real life difference - half a mile a gallon - although bench lab test would say other wise.

As a rough guide with first figures actual and second official
Metro 43mpg - Official 50mpg
Volvo 340 gle 33mpg - Official 38mpg
BX 19gti 32mpg Official 36mpg
Renault 5 diesel 65mpg Official 62mpg
205 diesel 72mpg Official 76mpg
Focus 1.6 petrol 44mpg Official 49mpg
Jag 3.2 26mpg Official 31mpg
XJR 26mpg Official 29mpg
Laguna 3.0 28mpg Official 34mpg
Picasso 52mpg Official 52 mpg
Sierra 35mpg Official 38mpg
360 Modena 16mpg Official 21mpg
Merc s280 28mpg Official 30mpg
Mazda 5 diesel 38mpg official 46mpg

It does seem though that a Volvo D5 with an official of 50mpg only achieves 32mpg - 40% less

(above cars are rough approximations)

Big difference to the varied cars above with their actual and official mpg doesnt it.???

[simonjedrake]

Originally Posted by simonjedrake

Only done 800 miles so far of reasonably gentle motoring mainly on Motorways averaging about 80 mph & am getting an average of 28.22 as measured from full tank to full tank. I have only used the Sport mode a few times which does dramatically change the engine map - trying to hold back until a few more miles on the clock........!!
Whilst I am a "wee" bit disappointed I do understand that the engine is still pretty tight & that today's diesels need a good few ooo's before they loosen up & the mpg start dropping. I would be happy to achieve 35mpg by the time I have got 5,000 miles on the clock - which is a great improvement from my previous car - V70 T5 - which I would normally average about 23mpg with the same journey patterns.

Pleased to report that now with 1,200 miles in the clock the engine definately feels a lot more lively. Did a round trip today of 180 miles on mainly A roads in Wales with lots of bends/hills (as you would expect..!) not holding back at all and was happy to see a journey average of 36.8 mpg. Getting Better.

[XC60AWD]

My MY12 car has now covered over 3000 miles since July 2nd and is averaging 35.4mpg from new, i have not reset the button.

The free 3000 mile check has been completed and all is well.

[scw]

My nearly 8 month-old MY11.5 D5 has just completed a ~2000 mile round trip to the south of France with four passengers, boot loaded to the roof, and four bikes on top. Average fuel consumption for the entire trip was 30.8 mpg (reset just before setting off).

I reckon that's not bad considering the ~1500 miles at an indicated 75mph with the four bikes on the roof. The D5 performed flawlessly, maintaining that speed in 6th gear even up some fairly decent inclines on the autoroutes.

The previous average, not reset since new, was around 35 mpg.

[DEFRO]

Originally Posted by volvorocks

Hi Defro

Hope you are good and well and have enjoyed the glorious sunny weekend?

There may be "small" improvements although I opine these amount to little.

Official fuel improvements I do believe are down to just the stop start...which in real life operates only about 40% of the time...so the MY12 is very very very slightly better than the non stop start MY11 or MY 11.5

MY12 has a tiny bit more power than the MY11 or MY11.5 (212 or 215 or thereabout compared to 202-205 or thereabout)

Real life driving..say on motorway - absolutely no difference...in town....probably absolutely no difference as stop start only works about 40% of the time)...due to load on the battery - has the car travelled far enough for the battery to be charged a good amount - doubt it......

Real life difference - half a mile a gallon - although bench lab test would say other wise.

As a rough guide with first figures actual and second official
Metro 43mpg - Official 50mpg
Volvo 340 gle 33mpg - Official 38mpg
BX 19gti 32mpg Official 36mpg
Renault 5 diesel 65mpg Official 62mpg
205 diesel 72mpg Official 76mpg
Focus 1.6 petrol 44mpg Official 49mpg
Jag 3.2 26mpg Official 31mpg
XJR 26mpg Official 29mpg
Laguna 3.0 28mpg Official 34mpg
Picasso 52mpg Official 52 mpg
Sierra 35mpg Official 38mpg
360 Modena 16mpg Official 21mpg
Merc s280 28mpg Official 30mpg
Mazda 5 diesel 38mpg official 46mpg

It does seem though that a Volvo D5 with an official of 50mpg only achieves 32mpg - 40% less

(above cars are rough approximations)

Big difference to the varied cars above with their actual and official mpg doesnt it.???

Well I hope you're wrong volvorocks, but I have the feeling that as you suspect the improvement will probably be disappointing, time will tell…

I can understand that the official mpg figures are not matching real life figures in a city driving environment as there are so many variables that can affect the fuel economy but call me naïve I don’t understand how the extra urban figures can be so way off; I mean driving at constant speed for a few miles (say 60 mph for about 10 miles) on a road that is not especially hilly/bendy/windy should return the same or close figure in real life as the on their test bed which is in my case 50.4 mpg (MY12 D5 AWD geartronic) yet the best I ever got is 38mpg on a good long stretch of road! Anybody getting around 50mpg in extra urban?