Peugeot and its sister brands Citroën and DS announced their intentions to become the first European car makers to publish real-world fuel consumption figures earlier this year, in a bid to close the credibility gap between owners’ experiences and over-optimistic official figures. The new figures are published alongside the official EU ones, which by law have to be made public to buyers.
Much like the 308's results, the new 2008 figures illustrate just how much of a difference there is between official claimed and real-world fuel economy. All of the engines tested decreased their average miles per gallon figure quite substantially, with the 1.6 BlueHDi diesel engine in 118bhp guise and with a manual gearbox being the hardest hit.
Peugeot's tests recorded an average of 54.3mpg for the unit, which is 22mpg less than the official figure, while the other diesel, a 99bhp BlueHDi unit, lost 21.9mpg from its 76.3 official mpg figure. The 1.2 Puretech petrol engines in 118bhp and 81bhp guises performed a little better, with the former recording a 19.1mpg loss from its 58.9 official mpg figure and the latter registering a 12.8mpg loss from the official 57.6mpg figure.
Earlier this year, discrepancies of between 30% and 40% against the official combined economy figures were also measured on three cars powered by a 118bhp 1.6 BlueHDi diesel, namely a Peugeot 308, Citroën C4 Grand Picasso 1.6 and DS 3. For example, the 308 recorded 56mpg compared to a customer figure of 55mpg and the EU combined test figure of 88mpg.
Peugeot's says its new real-world tests use a 96km (59.7-mile) route that is made up of a mixture of urban, country and motorway routes. It uses a selection of professional and amateur drivers, not directly employed by Peugeot, to ensure the results are as accurate as possible.