In-depth reviews

Peugeot 508 review - MPG, CO2 and running costs

Plug-in hybrid tech makes the 508 more relevant to company car users, but watch out for potentially high insurance costs.

Despite its sleek looks, the Peugeot 508 shouldn’t cost an arm and a leg to run, offering reasonable economy and CO2 levels.

It shouldn’t come as a great surprise that the 1.5 BlueHDI 130 model is the most efficient of the fossil-fuel versions, offering up to 63.6mpg with the six-speed manual gearbox, and a maximum of 62mpg with the eight-speed auto. CO2 emissions figures start from 120g/km for the manual and 124g/km for the automatic.

Choosing the more powerful 2.0-litre diesel in the 508 does affect economy, with the BlueHDi 160 returning 52.9mpg and the more powerful BlueHDi 180 posting official figures of 50.3mpg. CO2 figures range from 145g/km to 163g/km.

The two faster petrol models are less fuel efficient than their diesel counterparts, with the PureTech 180 returning 44mpg and CO2 emissions of 146g/km. The more powerful PureTech 225 isn’t far behind, with economy of 42.2mpg and emissions of 156g/km.

However, the best economy figures in the 508 range come from the plug-in hybrid 225 model. The PHEV is able to travel between 33-39 miles solely on electric power, with claimed combined fuel consumption of 166-235mpg. Of course you'll need to ensure you charge the battery regularly to get anywhere near these figures in real-world driving. CO2 figures are 29-38g/km, ensuring low Benefit-in-Kind (BiK) company car tax.

Insurance

When it comes to insurance, it’s likely that the 508 will be broadly competitive with its class rivals. But some competitors do have lower groupings, especially for entry-level models. The 1.5-litre diesel will be the cheapest to insure, with groups ranging between 22 and 24. 

The more powerful 508s fall into groups 29 to 32 for the diesels and 28-34 for the petrols, while the plug-in hybrid falls into groups 31-33, depending on trim level.

Depreciation

The Peugeot 508 has average residuals of 39% over 3 years and 36,000 miles, which isn’t bad when you consider that the family hatchback class is falling out of favour with new car buyers. In comparison, the Vauxhall Insignia Grand Sport and VW Passat score similarly over the same period.

Which Is Best

Cheapest

  • Name
    1.5 BlueHDi Active 5dr
  • Gearbox type
    Manual
  • Price
    £26,370

Most Economical

  • Name
    1.6 Hybrid Allure 5dr e-EAT8
  • Gearbox type
    Semi-auto
  • Price
    £34,175

Fastest

  • Name
    1.6 PureTech 225 GT 5dr EAT8
  • Gearbox type
    Semi-auto
  • Price
    £37,325

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