Petrol, hybrid or electric: where the car sleeps decides it
There is no best fuel. There is a best fuel for a car that sleeps on a driveway and covers 40 km a day, and a different one for a car that sleeps on the street and covers 400.
Two facts decide this
Almost every argument about fuel is downstream of two facts. Where does the car spend the night, and what is the longest distance it covers on a normal day? Answer those honestly and the choice usually makes itself. If you have not done the size and space work yet, start with the six questions — fuel is a filter you apply to a shortlist, not the thing that makes one.
Where it sleeps decides whether charging is something that happens while you are asleep or something you drive to. A car on a driveway with a socket is full every morning and nobody did anything. A car on the street is charged by making a trip, waiting, and paying public rates. That is not a small difference in convenience. It is the whole difference.
How far it goes in a day decides whether a battery is capacity you use or mass you carry. Electric range in this catalogue runs from 225 km to 655 km. If your normal day is 40 km, both ends of that are enormous, and the extra battery is doing nothing except adding weight and price to every trip you make.
What each drivetrain does with the energy
It is worth knowing what the four drivetrains do differently, because the differences are physical, and physics predicts where each one wins.
A petrol engine turns roughly a quarter to a third of the fuel's chemical energy into motion at the wheels. The rest leaves as heat, through the radiator and out of the exhaust. An electric drivetrain, measured from the battery to the wheels, is far better than that: most of what goes in comes out as motion. That gap is why electricity per kilometre stays cheap even where electricity is not cheap per unit.
The second physical fact is braking. A moving car's kinetic energy rises with the square of its speed, and a conventional car converts all of it into brake heat every time it stops. A hybrid recovers part of that and reuses it. This is exactly why hybrids shine in town, where you stop constantly, and why their advantage shrinks on a motorway, where you barely brake at all.
The same logic runs in reverse at speed. Air resistance rises with the square of speed, so the power needed to hold a speed rises roughly with its cube — which punishes every car, but punishes the electric one most visibly, because its one structural advantage has nothing left to recover, while a combustion engine at a steady cruise is closer to its efficient operating point than it ever gets in traffic. That is the whole reason the ranking flips between the ring road and the motorway.
The decision rule
| Overnight parking | A normal day | The answer |
|---|---|---|
| Driveway or garage with a socket | Under 100 km, long trips a few times a year | Electric. Charging becomes invisible. |
| Driveway or garage with a socket | Long motorway runs most weeks | Electric works if you will plan stops. Otherwise a hybrid. |
| Driveway or garage with a socket | Short weekdays, a fixed long run at the weekend | Plug-in hybrid, if and only if you plug it in nightly. |
| Street or shared parking | Mostly town, short hops, lots of stopping | Hybrid. It recovers braking energy without ever being plugged in. |
| Street or shared parking | Long distances, high annual mileage | Petrol, or diesel if the mileage is genuinely high. |
| Charging at work, street at home | A commute plus errands | Electric is workable. Check the charger is reliable first. |
Two things about that table. It never says one fuel is better than another, because none of them is. And it puts diesel in a single row: there are 7 diesels in this 101-car list against 36 petrols, 24 hybrids, 22 electrics and 12 plug-in hybrids, which tells you where the market has gone. Diesel still makes arithmetic sense at high annual distances, and what a car costs to run is where to do that sum for your own mileage. The finder asks about charging access directly, and it will tell you when your answers are pulling against each other.
The plug-in hybrid trap
A plug-in hybrid carries a battery big enough for a commute and an engine big enough for everything else. Driven as designed — charged every night, short trips on electricity, engine only for the long ones — it is a genuinely good answer for a specific life. Driven without ever being plugged in, it is a petrol car hauling several hundred kilograms of battery it never uses, and it is worse than the ordinary petrol car it is based on.
This is not a marginal effect. It is the same car behaving in two completely different ways depending on one habit. The official consumption and CO2 figures for a plug-in assume that a share of the driving is done on battery power; if you never plug in, no published figure describes your car at all.
The prices support that advice. In this catalogue plug-in hybrids run from €28,000 to €68,000, while full hybrids run from €21,000 to €44,000. You are paying at least €7,000 more at the entry point for a capability that only exists if you use it every day.
What it costs, in this catalogue
Prices by fuel in the European list: petrol €16,500 to €48,000, hybrid €21,000 to €44,000, plug-in hybrid €28,000 to €68,000, diesel €38,000 to €78,000, electric €18,900 to €85,000. Electric has the widest spread of any fuel here, which is the useful fact hiding in that line — there is no single electric price point to react to.
Running costs tell a different story from prices. The lowest monthly running cost in the whole catalogue, €72, belongs to an electric car — the Dacia Spring, which is also the shortest-range car here at 225 km. The catalogue's running costs span €72 to €265 a month with a median of €195. Purchase price and running cost are two different rankings, and a cheap car to buy is not automatically a cheap car to own. How much to spend puts the two together.
Tailpipe CO2 in this list runs from 0 to 230 g/km, with a median of 118. The zero is real and it is also literal: it is what leaves the car, not what it took to build the car or to generate the electricity. That is the honest framing, and it matters for the next section.
Where the experts genuinely disagree
Two questions here do not have a settled answer, and anyone who gives you a confident one is selling something. Both are worth understanding rather than resolving.
The lifetime carbon of an electric car
Building a battery has a carbon cost, so an electric car starts its life behind an equivalent petrol one and catches up as it drives. That much is agreed. What is disputed is where the crossover falls, because it depends on the size of the battery, where the cells were manufactured and how the electricity is generated where the car is charged — and those inputs vary by a large factor between countries. The decision rule: if carbon is your reason for buying, the two biggest levers you control are choosing the smallest battery that covers your real day, and keeping the car for a long time. A car replaced every three years spends its whole life paying off its own manufacture.
How long the battery lasts
Battery capacity fades with age, temperature and charging habits, and the fleet data is still young for the current generation of cars. The chemistry is not in doubt — repeated rapid charging, and leaving a pack sitting at a very high state of charge, are harder on the cells than slow charging to a partial level. How much that adds up to over ten years is a genuine open question. Charging explained covers the habits that help and the ones that do not matter as much as people think.
Questions readers ask
- Is a hybrid worth it if I only drive on motorways?
- Less than you would hope. A hybrid earns its advantage by recovering braking energy and by letting the engine run at a load it likes, and on a steady motorway cruise there is almost no braking to recover. If your driving is nearly all motorway, a good petrol — or a diesel at genuinely high annual distances — does much the same job for less money.
- Can I run an electric car without a home charger?
- You can, and plenty of people do, but be honest about the cost. Public charging is priced well above a home socket and it turns a five-second plug-in into an errand you run every week. Workplace charging is the usual way to make it work. Street parking with no reliable charger nearby is the clearest case for a full hybrid instead.
- Does cold weather really halve electric range?
- Halve, no. Reduce noticeably, yes. Two things happen at once: battery chemistry is less willing when cold, and the cabin heat has to come from the battery, whereas a petrol car heats the cabin with waste heat it was producing anyway. Pre-heating the car while it is still plugged in removes most of the second effect.
- Should I still buy a diesel?
- Only on arithmetic. Diesel is 7 cars out of 101 here and the cheapest of them is €38,000, so the entry price is high before you save a cent on fuel. At very high annual distances on long runs the economy still adds up; for anything else a hybrid or a petrol is cheaper to buy and cheaper to keep. Check what your own city or region does about older diesels before you commit, because the rules differ everywhere.