Peugeot 508 saloon (2011-2018) - MPG, running costs & CO2

The regular 2.0-litre diesel Peugeot 508 promises 67mpg

Carbuyer Rating

3.2 out of 5

MPG, running costs & CO2 Rating

3.3 out of 5

Peugeot has done a good job making the 508 as efficient as possible. The 148bhp 2.0-litre diesel engine offers, thanks to its 67.3mpg fuel economy. 

Peugeot 508 MPG & CO2

Three diesel engines are available, with the smallest a 1.6-litre, which has 118bhp and records a 0-62mph time of 11 seconds. It isn’t exactly quick, but fuel economy of up to 74.3mpg means it’s very fuel-efficient. This engine is available with either a six-speed manual or automatic gearbox, with the latter reducing fuel consumption by about two miles per gallon and increasing BiK from 21 to 22%. This can’t quite match the best figures of the Volkswagen Passat which can manage 76.3mpg with emissions of 95g/km of CO2.

There are also two versions of the 2.0-litre diesel: a 148bhp manual or a 178bhp automatic. They’re capable of 67.3mpg and 64.2mpg respectively, with BiK ratings from 23 to 24% for company-car drivers.

After the first year's CO2-based road tax (generally included in the on-the-road price), all Peugeot 508s cost £140 a year to tax.

Insurance group

The Peugeot 508’s insurance groupings range from 25 for the least powerful diesel to 32 for the range-topping GT trim and 178bhp engine. The Vauxhall Insignia Grand Sport sits in groups from 14 to 25, while the Ford Mondeo is placed in groups 16 to 32.


All Peugeot models have a three-year/60,000-mile warranty as standard, which is pretty average given some other manufacturers offer five or seven-year warranties.


Peugeot offers fixed prices on parts and fitting, so you know exactly how much your service will cost. The fixed-price servicing plan means you can pay monthly for any maintenance needed, starting from £13 per month for three-years/35,000-miles of maintenance, while five-years/35,000-miles costs £13.99 per month.

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