Peugeot 308 Fuel Efficiency Guide: MPG, Hybrids, Tips

The Peugeot 308 stands out in the family hatchback segment for its blend of stylish design, comfortable ride, and notably strong fuel economy. Across generations, Peugeot has prioritized efficiency through lightweight construction, advanced powertrains, and hybrid technologies, making it a cost-effective choice for daily commuters and long-distance drivers alike. This guide breaks down the MPG performance of various 308 models, drawing on official figures and real-world tests to help you select the right variant.

Understanding Fuel Economy in the Peugeot 308 Lineup

Fuel efficiency in the Peugeot 308 is enhanced by its reduced weight compared to predecessors—up to 140kg lighter in earlier models—which improves every engine’s performance without sacrificing power. Official WLTP figures provide a benchmark, but real-world MPG often varies based on driving style, conditions, and load. Diesels excel for motorway runs, petrols suit urban flexibility, while hybrids and electrics minimize fuel use through electrification.

Key factors influencing MPG include engine size, transmission type, and hybrid assistance. For instance, smaller displacement engines like the 1.2-litre petrol deliver balanced economy, while plug-in hybrids claim extraordinary figures when charged regularly.

Diesel Engines: Top Choice for High-Mileage Drivers

Diesel variants have long been the efficiency champions in the 308 range, particularly for those covering substantial annual mileage. The 1.5-litre BlueHDi 130 diesel achieves up to 65.6mpg combined, with CO2 emissions as low as 113g/km, keeping company car tax (BiK) attractive. This engine pairs well with higher trims, offering refinement on motorways where it quietly sips fuel at around 50-60mpg in tests.

Earlier models featured a 1.6-litre HDi 92 diesel, Peugeot’s most frugal option at a claimed 78.5mpg combined and just 82g/km CO2—ideal for fleets and families watching budgets. The discontinued 2.0-litre diesel in GT spec delivered over 50mpg with an automatic, blending power (178bhp) and thrift.

• 1.5 BlueHDi 130: 65.6mpg, 113g/km CO2 – Best for efficiency-focused buyers.
• 1.6 HDi 92 (older): 78.5mpg, 82g/km – Record-breaking low emissions.
• 2.0 Diesel (discontinued): 50+mpg – Powerful yet economical for top trims.

Real-world reports confirm these figures; one owner averaged 55mpg over 37,000 miles with minimal issues, praising its reliability.

Petrol Powertrains: Versatile and Affordable

Petrol engines in the 308 offer solid MPG without diesel’s maintenance concerns, starting with the 1.2-litre PureTech 108bhp unit at up to 54.9mpg. The 130bhp version nearly matches it at 53.7mpg, with CO2 from 119-147g/km depending on trim. These three-cylinder mills are smooth for city driving and responsive enough for overtakes.

Higher-output petrols like the 221bhp GT automatic hit 40mpg, while the GTI’s 268bhp manages 37.8mpg—respectable for a hot hatch costing around £30,000. The 1.6-litre e-THP 129bhp and 155bhp options provide spirited acceleration (0-62mph in 8.4s) without excessive thirst.

Hybrid and Plug-In Innovations

The latest 308 introduces mild and full hybrids, boosting efficiency amid rising fuel prices. The mild hybrid 1.2-litre (143bhp total) with six-speed auto improves on the prior 50mpg, hitting similar real-world figures thanks to electric boost for smoother starts. It accelerates to 62mph in 8.8s, feeling peppier in traffic.

Plug-in hybrids (PHEVs) shine with a 195bhp 1.6-litre setup, offering 53 miles electric-only range from a 17.2kWh battery. Claimed MPG exceeds 200mpg (WLTP), but real-world tests show 80mpg on mixed loops by maximizing EV mode. The 225bhp version adds punch (0-62mph in ~7s) while retaining refinement for business users.

The pure electric E-308 provides over 275 miles range, eliminating fuel costs entirely with government incentives like £1,500 contributions.

Real-World MPG Expectations

Official numbers set expectations, but everyday driving yields 10-20% less. Diesels maintain 50mpg on motorways, petrols around 45-50mpg mixed, and hybrids push 60mpg with charge management. Owners report 55mpg averages in 2013-2021 models, aided by lightweight design. Factors like tyre choice (e.g., avoiding low-profile 17-inchers) and eco-driving enhance results.

Running Costs Beyond Fuel

The 308’s efficiency translates to low ownership expenses. Post-first-year VED is standard rate for all, insurance groups span 14 (base petrol) to 36 (GTI), comparable to Golf rivals. CO2-based BiK favors diesels and hybrids. Reliability is strong; long-term tests show few issues over high mileages.

Compare to competitors:

• Vs. VW Golf: Similar insurance, but 308 edges diesel MPG.
• Vs. Cupra Leon: Hot hatches match GTI costs but lag in pure efficiency.
• Vs. Renault Megane RS: Sportier, thirstier than 308 GTI.

Choosing the Right 308 for Your Needs

For urban runs, opt for petrol or mild hybrid. Long hauls? Diesel or PHEV. EV suits zero-emission zones. All deliver 40-65mpg ranges, with hybrids future-proofing against electrification mandates.

Frequently Asked Questions

What is the best MPG Peugeot 308?

The 1.6 HDi 92 diesel claims 78.5mpg, while modern 1.5 BlueHDi hits 65.6mpg reliably.

Are Peugeot 308 hybrids worth it?

Yes, for 50-80mpg real-world and EV perks; PHEVs excel with charging access.

How do running costs compare to rivals?

Lower than Golf GTI equivalents, with competitive insurance and tax.

Is the 308 reliable for high mileage?

Owners report 55mpg over 37k miles with minimal repairs.

What’s the electric range of the E-308?

Over 275 miles, ideal for most daily needs.