The study assessed not only petrol prices across EU countries but also average earnings, providing a clearer picture of how affordable fuel is for households.

The findings show that drivers in Portugal face a significantly heavier financial burden than those in many northern European countries. Filling a standard fuel tank requires almost twice as much financial effort as it does in the Netherlands, where higher average salaries offset fuel costs.

The difference highlights how purchasing power can have a greater impact on affordability than pump prices alone.

Countries with higher average incomes generally perform better in the rankings, even where fuel itself is relatively expensive. By contrast, nations with lower wage levels see motorists spending a larger share of their earnings every time they refuel.

Portugal sits among the EU countries where this gap is most pronounced, reflecting the continued pressure that transport costs place on household budgets.

The report also illustrates the wider differences in living standards across Europe. While motorists in wealthier countries may pay similar prices per litre, the proportion of income required to fill a tank is considerably lower.

Analysts say the comparison demonstrates why fuel affordability cannot be measured by prices alone. Income levels, purchasing power and overall cost of living all influence how expensive driving is for consumers.

With many Portuguese households continuing to face higher living costs, fuel remains one of the most visible day-to-day expenses, particularly for those who rely on private vehicles for commuting or work.

The findings reinforce the challenges facing drivers in Portugal, where transport costs continue to represent a greater share of disposable income than in much of northern Europe.