RAC Cars News


PSA's real world fuel economy figures

By raccars Published


PSA is the first manufacturer to publicly announce its real world fuel economy figures.

We all know, these days, that manufacturers' published fuel economy figures bear very little relation to what happens when you get behind the wheel in the real world. While a new testing regime is on the way so that consumers can be given more accurate representations of fuel economy and efficiency when they are looking for a new car, PSA has taken a novel step in revealing the results of real world fuel economy testing.

Real world fuel economy testing by PSA Group

30 Peugeot, DS and Citroen models have been included in what could turn out to be a very clever marketing campaign, with statistics showing real world fuel economy averaging 22 mpg lower than previously published official figures. Buyers of best-selling models including the Citroen C4 Picasso, Peugeot 308 and the DS3 can now have a much clearer and more realistic idea as to what sort of fuel consumption they can expect.


Among the 14 Peugeot models tested, real world fuel economy averaged 22.34 mpg lower than official figures, and some models such as the 308 1.6 Blue Hdi 120 S&S BVM6 returned discrepancies of more than 30 mpg. Peugeot's biggest difference between published and real world fuel economy was on the 208 1.6I Blue Hdi 120 S&S BVM5 on 16 inch ULRR tyres, which only managed 60.1 mpg in real world testing compared to the stated 94.16 mpg, a shortfall of 34.06 mpg.


The Citroen C3 PblueHDi 75 S&S BVM using 15 inch ULRR tyres returned a rather disappointing 36.51 mpg discrepancy in fuel economy, Citroen's worst performer in the real world tests, whereas the C3 PureTech 82 BVM Exclusive on 16 inch VLRR tyres was only 16.57 mpg out, returning 44.84 mpg in real world testing compared to 61.41 mpg in previously claimed manufacturers' figures.

Citroen models averaged 22.77 mpg lower than official fuel economy figures and DS models tested came in at 20.87 mpg lower than the figures previously claimed by the manufacturer.

October 2015 call for transparency

The PSA Group has been open about its desire for greater transparency in the automotive industry after a torrid year of fuel economy and emissions scandals. PSA's decision to work with Transport & Environment, an environmental body, to conduct more realistic fuel economy tests has been widely applauded.

The real world tests were conducted on public roads which were also being used by other traffic and included driving 25km or 15.5 miles on urban roads, 39km or 24.23 miles on rural roads and 31km or 19.26 miles on motorways. Passengers and luggage were in the cars for the tests and fuel economy and emissions were measured using the same PEMS (portable emissions measurement system) which will be used in the new Real Driving Emissions testing regime when it commences.

Nox emissions figures in 2017

PSA plans to release the results of real world fuel economy testing for another 20 of its cars by the end of the year and is planning the addition of a simulator device on company websites which will allow drivers to test their driving style and usual road conditions online to predict accurate fuel economy figures. Next year PSA claims that it will also be releasing details of nitrogen oxide (Nox) emissions as tested in real world driving situations.

PSA Group makes the cleanest cars

Elsewhere figures have been published which show that Peugeot makes the cleanest cars on the road, followed by Citroen and then Renault. The average new Peugeot now emits 103.5g/km of CO2, 5.8km/km less than last year. Overall new car emissions are down by 3.2 per cent over the last year. However, Nissan and Fiat managed to buck this trend, with both reporting higher average CO2 emissions than at this time last year.

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