Choosing between petrol and diesel depends on fuel prices that vary significantly across markets in 2026. Diesel costs €1.865-€2.326/L, while petrol ranges €1.733-€2.35/L across EU markets.
This guide compares petrol vs diesel using verified 2026 prices, showing you which fuel type delivers better value for your specific driving needs and market.
2026 fuel price comparison across markets
In 2026, diesel prices range from €1.865/L in Spain to €2.326/L in the Netherlands, while petrol costs €1.733/L in Spain to €2.35/L in the Netherlands. UK prices show petrol at £1.64/L and diesel at £1.86/L. Germany diesel averages €2.232/L versus petrol €2.236/L.
The price difference between petrol and diesel varies by market: Spain diesel is 8% more expensive than petrol, UK diesel is 13% more expensive, Germany prices are nearly identical, while Netherlands diesel costs 3% less than petrol.
Real cost per kilometre comparison
For typical vehicles, diesel cars achieve better fuel efficiency (6-7 L/100km) versus petrol (8-9 L/100km). This efficiency advantage often offsets diesel's higher price per litre.
At 2026 prices, diesel costs €0.11-€0.16/km versus petrol €0.14-€0.19/km in most markets. The break-even point occurs when diesel's efficiency advantage outweighs its price premium.
Long-term ownership cost implications
The saving from diesel is not automatic. It depends on the gap between the two pump prices and how much less fuel the diesel engine uses. In Spain, diesel (€1.865/L) costs more than petrol (€1.733/L); in the Netherlands the picture is reversed (diesel €2.326/L versus petrol €2.35/L); in Germany the two are almost level (€2.232 vs €2.236). That is why the diesel advantage now varies sharply by market and by car — model your own numbers rather than assuming a fixed saving.
However, diesel vehicles often have higher maintenance costs and may face stricter emissions regulations in some EU markets. Factor in these additional costs when making your decision.
Use the free calculators
Frequently asked questions
Is diesel cheaper than petrol in Germany in 2026?
Diesel and petrol prices are nearly identical in Germany at €2.232/L and €2.236/L respectively. The slight diesel price advantage of 0.1% makes it marginally cheaper, but the difference is negligible for most drivers.
Where is petrol most expensive compared to diesel in 2026?
Petrol is most expensive relative to diesel in the UK, where diesel costs 13% more than petrol (£1.86/L vs £1.64/L). In most EU markets, diesel ranges from 3% to 14% more expensive than petrol.
How much do I save annually by choosing diesel over petrol?
No — not automatically. Diesel only wins where the diesel engine's lower consumption outweighs the price difference, and in 2026 that varies by market: diesel is more expensive per litre than petrol in Spain, cheaper in the Netherlands, and effectively level in Germany. Modern petrol engines have also closed much of the efficiency gap, so model your own mileage and local prices before assuming diesel saves money.
Do diesel cars have higher maintenance costs than petrol?
Yes, diesel vehicles typically cost 20-30% more for maintenance due to more complex engines, turbocharger requirements, and longer oil change intervals. Factor these additional costs into your total ownership calculation.
Which market offers the best value for diesel drivers?
Spain offers the best value for diesel drivers. With diesel at €1.865/L and petrol at €1.733/L, diesel costs only 8% more than petrol, but diesel cars are typically more efficient, making Spain the sweet spot for diesel economy.
Should I choose diesel based on fuel prices alone?
No, consider total ownership costs including maintenance, tax differences, and resale value. In many markets, the fuel savings don't offset diesel's higher maintenance costs and potential regulatory restrictions. Real-world driving patterns and vehicle type matter most.