EV Range Explained: WLTP vs Real-World (and How Much Winter Steals)

Range is the number every EV buyer fixates on — and the one most often misunderstood. The figure on the listing ("up to 400 km WLTP") is a lab result under ideal conditions. The range you'll actually see depends on speed, temperature, terrain, and how you drive. Understanding the gap stops you over-paying for range you can't use, and stops range anxiety from talking you out of a car that's perfectly fine.

Here's how to read EV range realistically.

What WLTP actually is

WLTP (Worldwide Harmonised Light Vehicle Test Procedure) is a standardised lab test — a fixed cycle of speeds and conditions, run at a comfortable temperature, with no heating or air-con load. It's useful for comparing one EV to another on a level playing field, but it's optimistic as an absolute number.

As a rule of thumb, expect roughly 75–85% of the WLTP figure in typical mixed real-world driving, and less in winter or at sustained high speed. (The older NEDC standard, on some pre-2018 EVs, was even more optimistic — treat NEDC figures with extra scepticism.)

What actually eats range

Five factors do most of the damage, in rough order of impact:

• Cold weather — the big one (see below).
• High motorway speed. Aerodynamic drag rises with the square of speed, so 130 km/h cruising drains an EV far faster than 90 km/h. Motorway-heavy drivers see the lowest range.
• Cabin heating (in winter) and, to a lesser degree, air-con.
• Terrain and load — hills, a full car, roof boxes, towing.
• Driving style — hard acceleration vs smooth; though regenerative braking claws a lot back in town.

Counter-intuitively, EVs are most efficient in slow city driving (regen + low speed) and least efficient on the motorway — the opposite of a petrol car.

How much winter really steals

Cold is the headline range-killer, for two reasons: the battery is less efficient when cold, and you're heating the cabin from the battery.

• A typical EV loses roughly 20–30% of range in cold winter conditions versus mild weather.
• A heat pump (fitted to many newer EVs, optional on some) cuts that loss significantly — heat-pump cars might lose ~15% where a resistive-heater car loses ~30%. Check whether a used EV has one — it materially affects winter usability.
• Preconditioning (warming the cabin/battery while still plugged in) recovers a lot of winter range, because the energy comes from the grid, not the battery.

So a "350 km WLTP" EV might do ~290 km in mild conditions and ~220 km on a cold motorway run — still fine for most daily use, but worth knowing before a winter road trip. Our winter car-care guide has the broader cold-weather checklist.

Why the gap matters less than you think

Range anxiety is mostly a mismatch between the headline number and actual needs:

• The average driver covers well under 50 km a day. Even a winter-degraded 220 km covers that four times over.
• You start most days "full" from home charging — unlike a petrol car you let run to empty.
• Public rapid charging fills the gap on longer trips.

For the vast majority of journeys, even a modest used EV's real-world range is more than enough. The number that actually matters is "does its real range comfortably cover my longest regular trip?" — not the WLTP headline.

What this means for buying a used EV

• Don't overpay for WLTP range you'll never use. A cheaper EV with 250 km real-world range may suit you perfectly and save thousands over a long-range version.
• Mentally discount the quoted figure — WLTP × ~0.8 for a realistic mixed-driving estimate, less for motorway/winter.
• Prioritise a heat pump if you drive a lot in winter.
• Remember range and battery health interact — an older EV's real range is its (degraded) capacity applied to these real-world factors, so check the battery's State of Health too: how to check a used EV's battery health.

Before you commit, run the specific EV through the AutoFindr analyzer — make, model, year, mileage — for its composite reliability score, known issues, and a fair-price band. And if you're still shortlisting, the most reliable used electric cars ranking is the place to start.

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