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40 MPG 😬

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Hi guys

Multiple Alfa owner - 1st time poster ✋

Picked up a 2.0 G yesterday - 150 mile drive home, almost entirely motorway gave Me 49 MPG driving like an absolute nun which I wasn't hugely impressed with.

Today mix of motorway and town and I can't get it above 40ish - again this is absolute feather touch driving in Natural mode.

Our previous heavy old 159 hit mid 50s on motorway travels, the 147s similar being absolutely belted (granted it's way lighter but still....)

Performance seems to be there - there's no hesitation across the range.

Car had full service this year according to paperwork so filters, etc should be fresh..
I've unplugged the MAF to see if he was playing silly buggers but not really seen much difference.

I'll try an EGR blank as that was an issue with economy on a previous car

Any help would be massively appreciated.

Thanks in advance

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2014 Sprotivanav 2.0 jtdm
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2014 2.0 jtdm Sportiva 175 TCT 125k miles - 26 mile each way commute so 52 per day, mix of A, B and unclassified roads, no real traffic crawling unless there's an issue.

No mods, just regular use and servicing. 54.5 mpg consistent over the last year.

I don't hang about but I don't use Dynamic - Normal most of the time but All Weather when it's grotty like now.
 

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Discussion Starter · #22 ·
2014 2.0 jtdm Sportiva 175 TCT 125k miles - 26 mile each way commute so 52 per day, mix of A, B and unclassified roads, no real traffic crawling unless there's an issue.

No mods, just regular use and servicing. 54.5 mpg consistent over the last year.

I don't hang about but I don't use Dynamic - Normal most of the time but All Weather when it's grotty like now.
That's great to hear mate - if I can hit anything north of 50 I'll be chuffed, it's what I'd expect from it

Just cleaned MAF sensor, hoping it sorts itself out from here - want to enjoy it now!
 

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The official MPG is 60mpg. I get that on the computer if I sit at 60mph in 6th gear on the flat. Between 50 and 60 for motorway driving seems normal. I would check the air filter, nice pleasant job !

78 mpg ? Was that coming down out of the mountains ! I've never seen a car that returns more than the official figures, anyone ?
It's easy to do better than official, if you can keep speeds constant, which I did there.
 

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The official MPG on the 170 manual was 60mpg. I have never even got close to that in 7 years of ownership.

The Honest John real MPG figures are usually very accurate.

With the fact that diesel is almost £0.30 per litre more expensive than petrol it does make justifying the diesel over the MA very difficult at the moment.

Me and the Mrs do almost identical miles per week and we are both spending about the same on fuel in both the Golf and the Alfa (Golf averages 37-40mpg on E10)
 

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2014 Sprotivanav 2.0 jtdm
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Yes Symon you're right - diesel will soon be uneconomical financially which is a step backwards. Soon my 30mpg petrol sports car will cost the same as my 50 mpg diesel :confused:

Yet tailpipe on dpf equipped G is spotless, tailpipe on petrol car black with deposits. Progess...
 

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Yes Symon you're right - diesel will soon be uneconomical financially which is a step backwards. Soon my 30mpg petrol sports car will cost the same as my 50 mpg diesel :confused:

Yet tailpipe on dpf equipped G is spotless, tailpipe on petrol car black with deposits. Progess...
The tailpipe on our G is as black as Newgate's knocker, and it struggles through the smoke test at the MOT each year despite the DPF still being there.

We bought he car on 60,000 miles and it was the same then although the smoke test wasn't so strict..
 

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It is possible that ours has issues, but despite much looking nothing has been found. The DPF hasn't been tampered with as far as i know.
 

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Discussion Starter · #36 ·
25mpg and about 32mpg on a run.
As my mate says, you don't buy an Alfa for it's economy.
Alfas normally have cracking diesels, had 147s, mitos, 159s all plenty of grunt, all decent economy for their sizes

The 170 moves enough but not enough to warrant low 40s on the motorway in My opinion

2.4s have given better returns than that 😅
 

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Used to get 25mpg out of my 2.4
I'm sure sat on the motorway in 6th for hours on end it would be fine but my journeys are always A road blasts 😎
 

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The 2.4 is well known for not being great on fuel.

They do drive well though, but being poor on fuel sort of defeats the object of having on.

Alfa diesels tend to go well and are reliable, but the 159 and Giulietta generations they are a tad thirsty and relatively unrefined.
 

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Alfa 159 2.0 JTDm Lusso 6sp.
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Yes Symon you're right - diesel will soon be uneconomical financially which is a step backwards. Soon my 30mpg petrol sports car will cost the same as my 50 mpg diesel :confused:

Yet tailpipe on dpf equipped G is spotless, tailpipe on petrol car black with deposits. Progess...
You would need a very economical (read slow/gutless) petrol or a bad derv for that to happen. Derv is only about 15% more than petrol....and most dervs do well over 15% better MPG that a petrol with the same power. My 159 2.0 JTDm does about 50% more mpg that a similar powered 159 2.2 petrol.
 

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You would need a very economical (read slow/gutless) petrol or a bad derv for that to happen. Derv is only about 15% more than petrol....and most dervs do well over 15% better MPG that a petrol with the same power. My 159 2.0 JTDm does about 50% more mpg that a similar powered 159 2.2 petrol.
Petrol technology has moved on a lot since the 2.2JTS

Check out the fuel economy of the more modern turbo petrols and then compare them to the diesels.

I know the site isn't full of VAG lovers, but the 1.4TSI engines fitted to the Leon, Golf etc make 150bhp and give similar performance and MPG to the 170 JTDm, but as the fuel is cheaper they actually work out less expensive to run. Also my my fuelling costs for my 230bhp Golf are pretty much the same as the 170JTDm as well due to the MPG of the Golf being remarkably good for what it is.


4 cylinder diesels especially also sound dreadful, and it is worth losing a couple of MPG just to be rid of that.

Honest John real MPG figures are generally quite accurate for comparison purposes.
 
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