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Peugeot Citroen vehicles 31% worse real-world fuel economy tests

PSA Group real-world fuel economy tests

PSA Group real-world fuel economy tests

PSA Group, parent company of French car brands Peugeot Citroen and DS, released initial findings from its own real-world fuel economy tests earlier this month. The data revealed that some models are thirstier than official figures by as much as 40% under realistic driving conditions, and that every one of the 28 core models put under scrutiny exceeded official figures by more than 23%.

The company said it published the data to be more “transparent” with its customers. It added that it decided to act in the wake of “collapsing consumer confidence in car testing” following last year’s dieselgate scandal, in which German manufacturer Volkswagen admitted installing systems designed to make some of its vehicles perform better while being tested than during ordinary driving.

The biggest shortfall in economy uncovered so far by the PSA Group tests concerned the Citroen C4 Picasso people carrier, when equipped with a 120 horsepower BlueHDi diesel engine with stop-start facilities, 6-speed automatic transmission and 17-inch wheels. The official combined cycle score for this spacious five-seater is an impressive 72.4mpg whereas the real-world measurement came in at 43.4mpg – worse by a whopping 29mpg or 40.1%.

The car with the smallest measured discrepancy in the sample was a Peugeot 2008 compact crossover, fitted with a 1.2-litre 82 horsepower PureTech petrol engine, five-speed manual gearbox and 16-inch wheels. Real-world testing resulted in economy of 44.1mpg, or 23.4% worse than the model’s 57.6mpg official combined cycle rating.

The average across the cars tested – 14 Peugeot, 11 Citroen and 3 DS models – revealed consumption 31% above the combined cycle figure. In practice, this means customers will need to pay for about a third more fuel when driving the cars tested than might be expected from official consumption figures. The full table of model-by-model results is included below.

PSA Group’s results were recorded using a standardised test procedure established by two non-governmental organisations: Brussels-based Transport & Environment (T&E) and Paris-based France Nature Environment (FNE). The tests were overseen by inspection and certification specialist Bureau Veritas.

The approach used was based on the EU’s upcoming Real Driving Emissions (RDE) procedure, which will become the official means to measure tailpipe pollution from September 2017.

A portable emissions measurement system (PEMS) was attached to each vehicle being tested, which was driven on public roads for defined stretches of 25km (15.5 miles) under urban conditions, 39km (24.2 miles) on rural roads and 31km (19.2 miles) at motorway speeds. The test cars were loaded with passengers and luggage, made use of air conditioning and experienced a variety of road gradients and surfaces, PSA Group stated. It described the test procedure as “scientifically robust, reproducible and representative of a typical driver”.

The company has committed to publish the tests of another 20 models by the end of the year, and to expand the available data to include emissions of harmful NOx gases. It has also pledged to develop a facility on its website for customers to provide details of their own car usage so that they can receive personalised predictions of real-world consumption and emissions.

Real-world Combined cycle Difference Difference
Peugeot models MPG MPG MPG %
108 1.2l PureTech 82 M5 15” tyres 46.3 65.6 19.3 29.4%
2008 1.2l PureTech 110 S&S EAT6 16” tyres 39.7 58.8 19.1 32.5%
2008 1.2l PureTech 82 M5 16” tyres 44.1 57.6 13.5 23.4%
2008 1.6l BlueHDi 100 M5 16” tyres 55.3 76.3 21 27.5%
2008 1.6l BlueHDi 120 S&S M6 16” tyres 54.2 76.3 22.1 29.0%
208 1.6l BlueHDi 100 M5 16” tyres 60.1 80.7 20.6 25.5%
208 1.6l BlueHDi 120 S&S M5 16” tyres 60.1 94.1 34 36.1%
3008 1.2l PureTech 130 S&S M6 17” tyres 37.1 57.6 20.5 35.6%
3008 1.6l BlueHDi 120 S&S M6 17” tyres 46.3 68.8 22.5 32.7%
308 1.2l PureTech 110 S&S M5 16” tyres 44.8 70.6 25.8 36.5%
308 1.2l PureTech 130 S&S M6 16” tyres 42.8 61.4 18.6 30.3%
308 1.6l BlueHDi 120 S&S M6 16” tyres 57.6 88.2 30.6 34.7%
508 2.0l BlueHDi 180 S&S EAT6 17” tyres 44.8 70.6 25.8 36.5%
PARTNER 1.6l BlueHDi 120 S&S M5 15” tyres 46.3 65.6 16.3 24.8%
Citroën models
Berlingo BlueHDi 100 M 15” tyres 46.3 65.6 19.3 29.4%
C1 PureTech 82 M Feel 15” tyres 46.3 65.6 19.3 29.4%
C3 BlueHDi 75 S&S M 15”tyres 57.6 94.1 36.5 38.8%
C3 Picasso BlueHDi 100 M Confort 16” tyres 49.5 74.3 24.8 33.4%
C3 PureTech 82 M Exclusive 16” tyres 44.8 61.4 16.6 27.0%
C4 BlueHDi 100 M Feel 16” tyres 55.3 78.4 22.7 29.0%
C4 Cactus BlueHDi 100 M Shine 16” tyres 55.3 78.4 23.1 29.5%
C4 Cactus PureTech 110 S&S M Shine 16” tyres 46.3 65.6 19.3 29.4%
C4 Picasso BlueHDi 120 S&S EAT6 Intensive 17” tyres 43.4 72.4 29 40.1%
Grand C4 Picasso BlueHDi 120 S&S M6 Attraction 16” tyres 49.5 70.6 21.1 29.9%
Grand C4 Picasso PureTech 130 S&S M6 Intensive 17” tyres 38.1 56.4 18.3 32.4%
DS models
DS 3 BlueHDi 120 S&S M6 Sport Chic 56.4 78.4 22 28.1%
DS 3 PureTech 110 S&S M So Chic 47 65.6 18.6 28.4%
DS 4 PureTech 110 S&S M So Chic 52.3 74.3 22 29.6%

 

By Lem Bingley

 

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