Peugeot 508 SW estate - MPG, running costs & CO2

While the Peugeot 508 SW is likely to be driven mostly by those running one as a company car, it’s an excellent family estate too. It suits both types of buyers, thanks in part to a range of efficient petrol, diesel and plug-in hybrid engines.

Peugeot 508 SW MPG & CO2

Almost every engine in the 508 SW is affordable to run but the 1.5-litre BlueHDi is likely to be especially popular in this class. With emissions from 115g/km of CO2, it has a reasonable BiK rating, keeping costs down for company-car drivers. An eight-speed automatic gearbox is standard, meaning it can return up to 64.1mpg. The more powerful 2.0-litre BlueHDi engine was discontinued in 2021, which was capable of around 52mpg.

The 1.2-litre PureTech petrol engine will return up to 50mpg and comes with an automatic gearbox as standard. Emissions start at 127g/km but suits private buyers who don’t cover a huge number of miles.

In 2020, Peugeot introduced a plug-in hybrid version of the 508 SW that’s said to manage up to 274.8mpg with emissions as low as 23g/km and 40 miles of electric-only running. Alongside this, the Peugeot Sport Engineered (PSE) model is a performance version of the plug-in hybrid 508 SW that has two electric motors. Despite delivering frenetic acceleration, the PSE claims fuel economy of up to 158.5mpg with emissions of 40g/km.

Charging both PHEV models from an optional 7.4kW wallbox takes an hour and 45 minutes, while using a standard three-pin socket ups this to seven hours. The initial prices of both plug-in models are relatively high but they make great choices for business users, thanks to low BiK ratings.

All regular petrol and diesel examples of the 508 SW are taxed at the standard rate of VED (road tax), while the plug-in hybrids qualify for the discounted rate. It’s quite possible to spend more than £40,000 on a regular model, with the PSE model also surpassing this figure, meaning that the additional annual surcharge is added in the first five renewal years.

Insurance groups

Insurance groups for the 508 SW are similar to the hatchback but they do look high next to the Skoda Superb Estate. For instance, the entry-level diesel Peugeot starts in group 22, while the Superb Estate diesel starts from group 21. A range-topping petrol 508 SW GT Premium finds itself in group 34 out of 50.

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Servicing

The 508 SW requires annual servicing and Peugeot offers maintenance packages that can be covered monthly to help spread the cost. These can last for up to five years and cost around £15 a month.

Warranty

Peugeots come with a three-year warranty that’s split into two years of unlimited mileage coverage, with a 60,000-mile limit for the third year. This is competitive with brands like Skoda and Volkswagen but shorter than the five- and seven-year cover offered by Toyota, Hyundai and Kia. New Peugeots also benefit from Peugeot's roadside assistance, covering the owner and anyone driving the car with their permission.