When it comes to covering serious mileage across Ireland—say, a hefty 20,000 kilometres a year—the old motoring maths is undergoing a fascinating shift. Gone are the days when fuel costs came with a single but predictable winner. Comparing the fuel bill of a dependable diesel saloon against an electric vehicle relying exclusively on public charging makes for a surprisingly tight race.
The Traditional Route: The Diesel Equation
Let’s start with the oil-burner. A sensible modern diesel cruising down the M7 will comfortably return around 5.6 litres per 100 kilometres.
Annual Distance: 20,000 km
Fuel Consumption: ~1,120 litres
Irish Pump Price: ~€2.05 per litre
Total Annual Cost: ~€2,300
It’s familiar, predictable, and requires nothing more than a quick stop at the local station forecourt.
The Modern Alternative: Public EV Charging
On the other side of the coin is the electric vehicle, specifically for drivers who live in apartments or homes without driveways and rely exclusively on public infrastructure. An average mid-sized EV consumes roughly 18 kWh per 100 km.
Annual Distance: 20,000 km
Energy Required: ~3,600 kWh
Public Rapid Rate (PAYG): ~€0.65 to €0.72 per kWh
Total Annual Cost: ~€2,450 to €2,600
Public DC rapid chargers—whether from ESB ecars, Ionity, or other network providers—carry higher per-kWh tariffs to cover the infrastructure and the sheer speed of high-power top-ups.
The Bottom Line
When you look at the raw numbers for 20,000 km a year, the financial gap narrows significantly. Relying just on public rapid chargers means an EV’s running costs can run neck-and-neck with, or even slightly exceed, those of a fuel-efficient diesel.
Of course, the broader picture comes with a major caveat: most EV drivers charge at home overnight at vastly cheaper domestic rates, which completely flips the savings equation. But if your lifestyle restricts you to public pillars, the fuel ledger shows a surprisingly level playing field. Neither technology holds an absolute monopoly on thrift—it all comes down to where you plug in.
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