Last updated 28 September 2026. At motorway speed an electric car uses about a third more energy per kilometre than at 90 km/h, so a daily highway commute should be planned on part of the WLTP range, not all of it. In more than 150 paired tests published by the Norwegian reviewer Bjørn Nyland, the median car used 1.37 times as much energy at 120 km/h as at 90 km/h and covered 73% of the distance. We plan on 82% of WLTP for a mild-weather motorway commute and 65% in winter; on that basis, 61% of the electric cars launched since 2025 cover a 200 km round trip in winter without a top-up.
This guide answers four questions:
- Why speed costs range, and how much.
- What cold adds on top.
- How much WLTP range a given commute needs.
- What makes a car good at motorway commuting.
Why the motorway costs range
Aerodynamic drag grows with the square of speed, so from 90 to 120 km/h the drag force rises by about 78%. The total energy per kilometre rises less than that, because tyre rolling resistance and the car's own electrical load do not grow with speed. The US Department of Energy also notes that an electric car recovers little energy on the highway, where it rarely brakes: counting regenerative braking, it puts 86–94% of battery energy to work in the city but 77–79% on the highway (fueleconomy.gov, Where the energy goes).
The rated range does not reflect this. The WLTP cycle averages 46.5 km/h over 23 km, and its fastest phase, peaking at 131 km/h, takes 323 of the cycle's 1,800 seconds (DieselNet summary of UN GTR No. 15). A commute spent at 110 to 130 km/h is a different drive from the one the rating measures.
How much range speed costs
| Test | What changed | Result |
|---|---|---|
| Bjørn Nyland range tests, more than 150 paired tests (our calculation from the public sheet) | 90 km/h vs 120 km/h, same car, same day | Median 1.37× the energy per km; 73% of the 90 km/h range. About the same below 5 °C (1.34×) and above 15 °C (1.38×). |
| Geotab, 3 million+ trips, Jul 2025 | 50 mph vs 80 mph (80 vs 129 km/h), at 30 °C | Sedan 277 vs 200 miles (−28%); 65 kWh van 143 vs 88 miles (−39%). |
| Consumer Reports, Dec 2023 | 22 EVs at a steady 70 mph (113 km/h) | Nearly half fell short of their EPA range; the BMW iX, BMW i4 and Mercedes EQE 350 beat it by more than 40 miles. |
Two things follow. The penalty is large and consistent: expect roughly a quarter less range going from 90 to 120 km/h. And it is not equal across cars. Drag favours low, smooth cars: in the catalog, SUVs launched since 2025 use a median 183 Wh/km on WLTP against 170 Wh/km for saloons.
What winter adds on top
Cold costs range through battery chemistry and cabin heating, and it stacks on top of speed.
- Across more than 30,000 US cars, Recurrent found cars keep 78% of their range at 0 °C and 70% at −7 °C; the best model kept 88%, the worst 69%. A heat pump added about 10% range at 0 °C (Recurrent winter range study).
- In the German automobile club's January 2026 winter test, 14 family EVs drove a simulated 582 km Munich–Berlin motorway trip on a test bench at 0 °C, averaging 111 km/h. The Audi A6 Avant e-tron covered 441 km at 23.2 kWh/100 km, the Tesla Model Y 406 km at 22.2 kWh/100 km, and the BYD Sealion 7 just under 300 km at 35.3 kWh/100 km (ADAC, Jan 2026).
- In Norway's El Prix winter test at −7 to −32 °C, cars lost 38% of their WLTP range on average (NAF, Feb 2026).
The ADAC run is the closest to a winter motorway commute, and its spread matters more than its average: the thirstiest car used about half as much energy again per kilometre as the most frugal ones. Winter is where the choice of car shows.
How much WLTP range your commute needs
Size the commute on the day you need the car most: a winter day at motorway speed, with a buffer. We use three numbers.
- Motorway factor: 82% of WLTP in mild weather, 65% in winter. These are the same estimates every evstats.org model page shows. They are ours, not a test result, and they sit inside the range of the tests above: roughly a quarter less at motorway speed than at 90 km/h, and a further fifth or more in the cold.
- Charge window: 80% of the battery, for example charging to 90% and arriving with 10% left.
- Required WLTP range = round trip ÷ (motorway factor × 0.8).
| Daily round trip | WLTP needed, mild | Share of cars since 2025, mild | WLTP needed, winter | Share of cars since 2025, winter |
|---|---|---|---|---|
| 100 km | 152 km | 100% | 192 km | 99% |
| 150 km | 229 km | 98% | 288 km | 88% |
| 200 km | 305 km | 87% | 385 km | 61% |
| 250 km | 381 km | 61% | 481 km | 21% |
| 300 km | 457 km | 35% | 577 km | 4% |
Shares are of the 498 cars on sale in the evstats.org catalog that launched in 2025 or later, checked on 28 September 2026. Two adjustments for a car you will keep: battery capacity falls with age, by 2.3% a year on average across 22,700 cars in Geotab's data (Geotab, Apr 2026), so after five years plan on about a tenth less. And if you can charge at work, the round trip in the table becomes the longer of the two legs.
Most highway commutes fit easily. Up to 150 km a day, almost any new electric car covers a winter day at motorway speed. Above 200 km, the choice narrows quickly: in winter only 61% of cars cover 200 km and 21% cover 250 km.
What makes a car good for motorway commuting
- Low consumption. Every kWh a car does not use on the motorway is range you keep and electricity you do not pay for.
- A low, smooth body. Drag is the main cost at speed; saloons and estates beat SUVs of the same size.
- A heat pump, for winter; Recurrent measured about 10% more range at 0 °C.
- Enough DC speed for the days the commute becomes a trip. For daily commuting it matters less than efficiency.
The most efficient long-range cars in the catalog launched since 2025 (best version per model line, WLTP 450 km or more; efficiency is the WLTP figure, so read it as a ranking, not a motorway result):
| Car | Body | WLTP range | Efficiency | Catalog price |
|---|---|---|---|---|
| Mercedes-Benz CLA 350 4MATIC | Saloon | 575 km | 12.5 kWh/100 km | €60,285 |
| Tesla Model 3 Long Range RWD | Saloon | 580 km | 13.6 kWh/100 km | €45,970 |
| Hyundai IONIQ 6 84 kWh RWD | Saloon | 545 km | 14.7 kWh/100 km | €55,300 |
| Kia EV4 Hatchback 81.4 kWh | Hatchback | 505 km | 14.9 kWh/100 km | €43,240 |
| Mercedes-Benz CLA Shooting Brake 250+ | Estate | 565 km | 15.0 kWh/100 km | €57,096 |
| BMW iX3 50 xDrive | SUV | 635 km | 15.1 kWh/100 km | €70,900 |
The full list is the EVs with the longest range; to set two candidates side by side, use the comparison tool. For the wider choice of a commuter car, including city commutes where charging speed barely matters, see the best EV for commuting.
Habits that add range on the motorway
- Drive a little slower. Nyland's tests put 90 km/h at roughly three quarters of the energy of 120 km/h. On a long commute, 110 instead of 130 km/h is one of the largest savings you control.
- Heat the car while it is plugged in. Pre-conditioning from the grid leaves the battery for the drive.
- Keep tyres at the pressure on the door pillar, and take roof boxes off.
- Charge at home to the daily limit your carmaker recommends, and keep 100% for the days you need it.
To see what a mid-commute top-up would take for a specific car, run it in the charging simulator. How to compare ratings between cars, including WLTP against EPA, is in how to compare electric car ranges.