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New petrol, diesel and hybrid cars are, on average, 5.4% less efficient than their official WLTP fuel consumption figures suggest, according to new research by What Car?.
It tested 56 new models under its independent True MPG test, to determine its real-world fuel economy. The figure was then compared to the manufacturer’s claimed figure.
On average, vehicles were 5.4% less efficient than the WLTP figures suggested, but the research revealed significant differences between models.
The worst performers were found to be more than 20% less efficient than their official figures, while the best performers were found to be 15% more efficient.
The tougher and longer WLTP emissions and type approval test was introduced in 2017 by the European Commission and became mandatory for all new vehicles from September 2018 onwards. The WLTP test replaced the previous New European Driving Cycle (NEDC) type approval test, which dated back to the 1980s, with the aim of providing more accurate fuel consumption figures for new car buyers.
The new WLTP test is significantly more accurate than the NEDC test, according to What Car?’s figures. In a previous study of 159 vehicles tested under the NEDC protocol, there was an average discrepancy of 20.2% between True MPG and the manufacturer quoted figures – with the worst performers as much as 40% less efficient than advertised.
Steve Huntingford, editor of What Car?, said: “For years, most buyers have taken the official fuel economy figures with a grain of salt. Our research shows that while the latest test is more accurate, there are still large differences on some makes and models, which is why it’s important for buyers to do their research before buying.”
What Car? publishes its True MPG data on its website, which can be viewed for free here.
The only person who got all his work done by Friday was Robinson Crusoe.
Anything i post over three lines long please assume it is an article lol.
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That’s roughly the same what I’m getting in my xc40 r design pro, know it’s been recommended I get it checked, and I may. But if I’d have known the MPG was roughly half of what I get from my old 2litre merc CLA I’d have never got it.
I put a review of the XC40 around this time last year. I said I was shocked at getting 28mpg, especially since most of it was cruising on autobahns restricted to 80/100 kph
Oh that’s just shocking for the T4 ?
My old V6 petrol Jaguar was better than that…..just!
That’s progress I guess. Imagine what it would be like before the introduction of the WLTP standard.It’s disappointing to see BMW there.
? I will be remembered for nothing but had great fun doing it ?
<p style=”text-align: left;”>I wonder how the B4 P in the Volvo would compare?</p>
@Macca, I was interested in the B4 but read reports of lower 30’s for it in the real world. That kind of put me off.
Not fully put off though as it would depend on the AP. If that was low enough at the time I order and I could offset it against the extra 3 year fuel cost, then happy days.
Doesn’t look likely though.? I will be remembered for nothing but had great fun doing it ?
why are they allowed to do that,
a lot of people mpg is very important in deciding on a car especially if you are doing a lot of miles i canceled an xc40 petrol 4×4 because of that after looking at the millage it was much lower than advertised sales person eventual y said 25 mpg i get over 40 on my xc60 d
and the price of fuel is rising all the time
I would suggest that the WLTP test is not fit for purpose and how are they getting it soooo wrong?
The only person who got all his work done by Friday was Robinson Crusoe.
Anything i post over three lines long please assume it is an article lol.Brydo i think its just to sell cars once we get the car its not as if we can go back and say im not getting mpg you stated they would just say its the way you are driving
The thing is Martino it’s their job to get it right, otherwise, what’s the point.
Also, being on Motability, the only regular charge that we have to pay is for the fuel, which is why it is even more important that MPG figures are as accurate as possible. Our Renault Grand Scenic diesel was averaging about 52 MPG when we changed it last year for a Seat Ateca (petrol). Sadly, we are lucky to get much over 35 MPG in the Ateca which makes it not really affordable. At the time we ordered the figures given were 51 or 52 MPG! Hopefully when things are moving to ‘new normal’ we’ll be able to change the Ateca earlier due (in part) to the MPG .
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