Discussion
My wife recently purchased the new 7.7CDTi astra 5 door. She has now done 18000 miles and is only getting an average of 43 mpg. The book says Urban 51.4, extra Urban 72.4, combined 62.8. Now I know these are pie in the sky figures but surely we should be getting better than 43! Anyone got any comparissons?
PS she does approx 10% urban 70% Motorway 20% country roads.
Ta,
Pete.
PS she does approx 10% urban 70% Motorway 20% country roads.
Ta,
Pete.
Road2Ruin said:
My wife recently purchased the new 7.7CDTi astra 5 door.
Holy s
t, 7.7 diesel?!?Newsflash - Vauxhall don't make economical diesels. 40-45mpg is all you'll ever get out of any of them. I've had a few diesel Vauxhalls, and there's a heap of them in the fleet, and they all sit around mid 40s.
If you want an economical diesel, you need to go French. 308HDI seems the best of the bunch.
7.7 diesel? Must pull like a train 
Hearing more and more stories of cars where the actual cars are developed just to achieve high book figures, and won't produce anything like it in the real world so it may not be too bad; look at the Fiat 500 twinair for the best example. Stupid really.
Edit: Just to rub it in a bit My 20 year old petrol Astra on a similar mix of journeys is getting around 40 mpg 
Progress?
Hearing more and more stories of cars where the actual cars are developed just to achieve high book figures, and won't produce anything like it in the real world so it may not be too bad; look at the Fiat 500 twinair for the best example. Stupid really.
Edit: Just to rub it in a bit
My 20 year old petrol Astra on a similar mix of journeys is getting around 40 mpg Progress?I had one of the last generation sporthatches with the 1.7 diesel. for the first 20k i struggled to beat 45mpg. Up to 60k it eased to 50mpg and then above that until i sold it at 90k i was averaging nearly 60mpg. I can only think that the car was loosening up (either that or i grew up slightly)
My driving was similar, although 90% motorway
My driving was similar, although 90% motorway
She'd have been better off in a 2.0L petrol Toyota. Seriously.
I get 45+mpg from mine all week.
A colleague at work just got a new diesel Astra to replace a 2008 1.4 petrol Corsa, "to save money on fuel"
£7000 outlay to get the same fuel economy and pay a few pence more per litre for the fuel.
Strayed of topic a bit, sorry!
I get 45+mpg from mine all week.
A colleague at work just got a new diesel Astra to replace a 2008 1.4 petrol Corsa, "to save money on fuel"
£7000 outlay to get the same fuel economy and pay a few pence more per litre for the fuel.
Strayed of topic a bit, sorry!
Road2Ruin said:
My wife recently purchased the new 7.7CDTi astra 5 door. She has now done 18000 miles and is only getting an average of 43 mpg. The book says Urban 51.4, extra Urban 72.4, combined 62.8. Now I know these are pie in the sky figures but surely we should be getting better than 43! Anyone got any comparissons?
PS she does approx 10% urban 70% Motorway 20% country roads.
Ta,
Pete.
The big question is how does she drive and what sort of roads are they?PS she does approx 10% urban 70% Motorway 20% country roads.
Ta,
Pete.
I don't mean that in an offensive way, but on almost all of my cars I can alter the mpg by about 50% increase from worst to best depending on how I drive.
I'd recommend an experiment - plan a day out or something. Fill it up, zero the trip and then drive 100-150 miles m-way style driving at a fairly steady 55-65mph with light throttle inputs and not letting the engine labour.
Then refill it and see what mpg it's done by working it out. If it's not close to the extra urban figure then it might suggest a problem. In which case take it back to the dealer and if need be ask them to test drive it a bit and demonstrate that it's achieving the correct mpg (or not
).Road2Ruin said:
Thanks all. Yes that 7.7CDTi is a real goer... Sorry should have said 1.7CDTi
She tells me she never does over 75 (cough) on the motorway, and I believe her. But I will try it myself soon over alongish journey at 60MPH and see what I get.
Pete
It's the only way to be certain. If even trying it's still a lot lower than expected then you have some ammo/info to go back with. If however it does return good results you know it's all down to the driving style.She tells me she never does over 75 (cough) on the motorway, and I believe her. But I will try it myself soon over alongish journey at 60MPH and see what I get.
Pete
Not really relevant, but I used to run a 106 diesel. The way I drove it'd easily do 62-66mpg. However if I drove it just a little bit harder, an extra 5-10mph cruising speed and move right foot action. But hardly what anyone would call spirited driving it'd drop to 45-48mpg. I never once had it doing anything in the 50's, always either mid 40s or mid 60s.
I just "upgraded" from an Astra 1.9cdti (150bhp version on a 57 plate) to a 1.7cdti (110bhp version on an 11 plate)
In similar driving (c75% motorway at 70 other than the inevitable traffic) the MPG is...
1.9 - consistent 48ish
1.7 - only done 1300 miles so far, first tank was 44mpg and i was pretty gutted cos i bought it for economy (c2k miles per month) not long done second tank and it was 48.5mpg... hoping it will continue to ease off and hoping to hit a minimum of 55mpg within a couple of thousand miles.
So far i've got mixed feelings on the car, feels really sluggish although again feels like it's easing off a bit... on the otherhand though it drives REALLY well for what i want (i've got an Exige for real driving) and is much quieter and comfier than the previous version.
Interior is excellent for a Vauxhall and having the built in bluetooth helps break the monotony of the motorway journeys....
In similar driving (c75% motorway at 70 other than the inevitable traffic) the MPG is...
1.9 - consistent 48ish
1.7 - only done 1300 miles so far, first tank was 44mpg and i was pretty gutted cos i bought it for economy (c2k miles per month) not long done second tank and it was 48.5mpg... hoping it will continue to ease off and hoping to hit a minimum of 55mpg within a couple of thousand miles.
So far i've got mixed feelings on the car, feels really sluggish although again feels like it's easing off a bit... on the otherhand though it drives REALLY well for what i want (i've got an Exige for real driving) and is much quieter and comfier than the previous version.
Interior is excellent for a Vauxhall and having the built in bluetooth helps break the monotony of the motorway journeys....
On pretty much all the cars I've had, 80mph cruise on a motorway has given me what the book has said was the 'combined' average. My average mpg figures have always ended up being nearer to the 'urban' book values. That's what I've always reckoned on anyway - actual figures being one level down from what the book says.
don't know about the new 1.7 engine, but the 1.9cdti is the alfa/fiat engine and it would seem that with a DPF the mpg isn't great as moaned about by 159 owners.
TBH though I have driven alot of different diesels recently and in general 45-50 combined seems the best I ever get with the exception of an old 110hp PDI VAG unit that never seemed to drop below 50, although it may have been a hopeful trip computer!
TBH though I have driven alot of different diesels recently and in general 45-50 combined seems the best I ever get with the exception of an old 110hp PDI VAG unit that never seemed to drop below 50, although it may have been a hopeful trip computer!
edward1 said:
TBH though I have driven alot of different diesels recently and in general 45-50 combined seems the best I ever get with the exception of an old 110hp PDI VAG unit that never seemed to drop below 50, although it may have been a hopeful trip computer!
That the old 1.9? Could return 55mpg all day long on the motorway at legal speeds. Found it a bit rough and gutless low down the range, and it ran out of puff if you took it to the redline, but it was quiet and frugal when cruising. They don't (and can't) make 'em like they used to. Never mind. Apparently the new diesels are better for our health. SSBB said:
That the old 1.9? Could return 55mpg all day long on the motorway at legal speeds. Found it a bit rough and gutless low down the range, and it ran out of puff if you took it to the redline, but it was quiet and frugal when cruising. They don't (and can't) make 'em like they used to. Never mind. Apparently the new diesels are better for our health.
My Old New Civic 2.2 CDTi used to get 62mpg on average, and that was a quick car too.HellDiver said:
Newsflash - Vauxhall don't make economical diesels. 40-45mpg is all you'll ever get out of any of them. I've had a few diesel Vauxhalls, and there's a heap of them in the fleet, and they all sit around mid 40s.
If you want an economical diesel, you need to go French. 308HDI seems the best of the bunch.
My mate's got a 2002 Astra 1.7 DTi (except the turbo's fIf you want an economical diesel, you need to go French. 308HDI seems the best of the bunch.
ked so it's more of a 1.7Di!) It's done 203000 miles, has a dashboard lit up like a christmas tree and manages a consistant 62mpg for 600 miles a week brim to brim.Maybe the new one's are s
t
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