Parkers overall rating: 4 out of 5 4.0

Miles per pound (mpp) Miles per pound (mpp)

Petrol engines 5.5 - 7.4 mpp
Diesel engines 6.6 - 9.4 mpp
Plug-in hybrid petrol engines 25.2 - 35.7 mpp
Low figures relate to the least economical version; high to the most economical. Based on WLTP combined fuel economy for versions of this car made since September 2017 only, and typical current fuel or electricity costs.
Based on "Weighted" mpg; figures depend on the proportion of miles driven in pure electric mode and may vary widely

Fuel economy

Petrol engines 36.3 - 49.1 mpg
Diesel engines 45.0 - 63.6 mpg
Plug-in hybrid petrol engines 166.2 - 235.4 mpg

Peugeot 508 (2021)

  • Impressive claimed economy figures
  • Should mean fuel bills are manageable
  • Finance costs are quite pricey

How much is it going to cost to run?

The Peugeot 508 is powered by a range of efficient petrol, diesel and hybrid powertrains and shares many components with the 308 and 508 SUVs, making it a cheap car to fuel and service.

MPG and CO2

Claimed fuel economy figures across the 508 range are impressive, even on the faster petrol models. Unsurprisingly, the BlueHDi diesels come with the highest claimed fuel economy.

The star of the range is the 1.5-litre BlueHDi 130, returning between 53.7-63.6mpg when fitted with the manual transmission. If you go for the automatic gearbox with this engine, claimed fuel economy drops between 52.4-62mpg.

Next up is the BlueHDi 160, returning between 45.4-52.9mpg on the combined cycle, while the highest-output diesel – the BlueHDi 180 – sees this in the region of 45.7-50.3mpg.

Peugeot 508 rear lights 2019

The petrols aren’t as economical – at least according to claimed figures – but are still reasonable. The PureTech 180 claims between 38.8 and 44mpg, while the PureTech 225 is slightly better, ranging between 39.2-44.1mpg as we suspect it doesn’t need to work so hard in everyday driving. Servicing and maintenance shouldn’t be as costly as its BMW, Audi and Volkswagen rivals, with servicing packages likely to be available.

Fuel tank capacity for petrol 508s is 62 litres and 55 litres for diesels. All BlueHDI models come with a 17-litre tank for its AdBlue system.

Fuel economy figures for the Hybrid range from 166.2-235.4mpg, but you’ll have to constantly keep that battery topped up to reach anywhere near that figure.

The 11.8kWh battery on the Hybrid can drive on electric power alone up to 33-39 miles before requiring a recharge, which can take less than two hours when using a more powerful 7kW charge point. Speaking of which, you can check, plan and control when to charge the plug-in hybrid via a smartphone app. Peugeot had also teamed up with Podpoint for providing a service for installing home chargers when the plug-in hybrid was launched.

Diesel engines in the 508 range offer some pleasingly low CO2 emissions figures, which will be of particular interest to company car drivers. The best in this regard is the 1.5-litre BlueHDi 130, emitting between 92g/km and 98g/km of CO2 with the automatic gearbox. Opting for the manual gearbox sees this range between 93-98g/km.

The BlueHDi 160 emits between 110-115g/km, while BlueHDi 180 diesels emit between 109 and 114g/km.

Peugeot 508 exhaust 2019

For the petrols, the PureTech 180 ranges between 114 and 121g/km, while the PureTech 225 at the top of the range emits between 110 and 128g/km.

The plug-in hybrid 508 boasts the lowest emissions in the range with a figure of 31-40g/km of CO2.

Servicing and maintenance

Peugeot has a large dealer network, and its image is rapidly improving. Customer service is rated highly, and in the JD Power Vehicle Dependability Study, Peugeot topped the table with 77 faults per 100 cars – beating Skoda, Hyundai and Nissan.

Peugeot doesn't offer any fixed-term servicing or maintenance plans, but many of its larger dealer groups do. However the firm offers a selection of fixed proce repairs on a two-tier system based on whether the dealer is using Peugeot or Peugeot-approved parts. Typically, a cambelt change comes in at £499 (or £399), which is competitive.


  • Hard to gauge the 508’s reliability just yet
  • Shares a platform with latest 3008 and 5008
  • Peugeot’s reputation has improved lately

The previous Peugeot 508 was the subject of several recalls during its life cycle, but this generation uses the same technology that underpins the 3008, 5008 and several other Peugeot and Citroen models. The brand’s reputation has improved in recent years when it comes to reliability, and the 508 feels very solid and well put together.

Under the skin, components used can be found in some of the brand’s most recent cars, however the 3008 and 5008 have been the subject of a few recalls in the last couple of years. Nothing too serious, and Peugeot will rectify the issues under the car’s warranty anyway.

The battery for the plug-in hybrids come with a stand-alone eight-year, 100,000 mile warranty. There have been no recalls so far since its launch at the end of 2018.

Peugeot 508 (2021)

Ongoing running costs

Road tax (12 months) £145 - £480
Insurance group 21 - 34
How much is it to insure?