Laboratory range figures are one thing; the reality of driving at a steady 112 km/h on a motorway is quite another. A major analysis from the United States now highlights which EVs comfortably beat their makers’ claims - and which models see their long-distance range drop noticeably.
Range shock or a pleasant surprise?
Consumer Reports put 27 electric cars through a straightforward but unforgiving routine: maintain a constant motorway speed and keep driving until the battery is empty. The aim was not an idealised maximum range, but a realistic use case for long holiday trips or everyday commutes with a heavy motorway element.
Notably, the benchmark was the American EPA figure, which is generally seen as tougher than the WLTP procedure commonly used in Europe. Even so, the results still revealed some striking gaps - both above and below the official numbers.
"Some models travelled significantly further than promised, while others lost up to a fifth of their official range on the motorway."
The evaluation centred on three key questions:
- Which manufacturers publish more conservative, realistic range figures?
- Where are there positive reserves that help on long motorway runs?
- And which EVs fall away most sharply at 112 km/h?
BMW leaves the competition behind
BMW finished at the top of the table. On average, the Munich brand delivered around 18% more range than its official EPA figures suggest. For EV drivers, that translates into more confidence when planning routes and fewer charging stops than expected.
BMW i4 and i5 with a hefty range bonus
The BMW i4 M50 emerged as something of the test’s quiet standout. Instead of the officially stated 430 km, the sporty saloon covered a substantial 512 km in the real-world run - an increase of about 82 km.
The larger BMW i5 M60 went further than its numbers, too: its 402 km EPA rating became 475 km in the test. That is roughly 73 km added on top.
These results are not only about big battery packs. BMW appears to be extracting a great deal through efficiency - via strong aerodynamics, carefully managed battery thermals, and well-judged calibration of the motor, inverter and regenerative braking.
"Anyone who drives quickly on a regular basis benefits most from cars that create little aerodynamic drag at higher speeds and keep a very tight hold on battery temperature management."
German manufacturers dominate the top
BMW was not the only German brand to perform strongly. Mercedes and Mini followed close behind, keeping the podium firmly in German hands.
Mercedes and Mini: steady extra kilometres
Across the Mercedes models tested by Consumer Reports, the cars went about 12% further on average than their EPA figures indicated. In day-to-day terms, that meant gains of roughly 40 to 50 km.
Mini - as part of the BMW Group - benefited from similar technical approaches and achieved comparable uplifts. Taken together, the German manufacturers were close to a 10% improvement versus their official claims.
That points to a clear strategy: premium brands have invested heavily in efficiency for years, for example through:
- Slippery body shapes with low drag coefficients
- Advanced brake energy recuperation systems
- High-capacity cooling for the battery and drivetrain
- Tyres designed for particularly low rolling resistance
Koreans favour accuracy over headline numbers
Hyundai and Kia take a different tack. Their EVs matched the EPA figures almost exactly. The average deviation was a modest -0.6% - essentially within normal variation.
Hyundai Ioniq 5N proves fun and efficiency can coexist
One notable outlier on the positive side was the Hyundai Ioniq 5N. In the test, the performance version managed 378 km despite an official figure of 354 km. That is almost 7% more, reinforcing the point that even powerful EVs can be efficient.
On the other hand, the Kia Niro came up slightly short. It missed its EPA figure by around 23 km, pulling the Hyundai/Kia average down a little.
"Buyers who don’t like surprises are likely to do well with Korean models: the promised range aligns very closely with reality."
US EVs: between standout and disappointment
The picture is far more mixed among American manufacturers. Some Teslas come out ahead while others lag clearly behind, and several large pick-ups end up near the bottom of the table.
Tesla: Cybertruck OK, Model S stumbles
The Cybertruck and Model Y Long Range performed reasonably well and finished slightly above their official EPA numbers. For long-distance drivers, that at least represents a small bonus.
The Tesla Model S Long Range told a different story. Its EPA figure was 663 km, but in the motorway run it managed only 592 km. That is a drop of around 71 km, or a little over 10%.
Anyone planning charging stops purely around brochure values needs to expect this sort of gap - especially with lots of motorway driving at a brisk pace.
Heavy pick-ups lose a lot on the motorway
Large, heavy US models were hit hardest. The Chevrolet Silverado EV ended up about 34 km below its advertised figure, while the Ford F-150 Lightning gave up around 80 km.
The fall was even more pronounced with the Rivian R1S and Lucid Air Touring. In the test, both were down by about 84 km versus the EPA value. The reasons are straightforward: big body shapes, an unfavourable frontal area, and poorer aerodynamics at a steady higher speed.
The biggest winners and losers at a glance
| Model | EPA range | Real range (112 km/h) | Deviation |
|---|---|---|---|
| BMW i4 M50 | 430 km | 512 km | +18 % |
| BMW i5 M60 | 402 km | 475 km | +19,1 % |
| Hyundai Ioniq 5N | 354 km | 378 km | +6,8 % |
| Tesla Model S Long Range | 663 km | 592 km | -10,7 % |
| Rivian R1S | 434 km | 350 km | -19,4 % |
Why laboratory figures and motorway driving diverge so much
Test cycles such as EPA or WLTP blend town, rural-road and motorway driving. On test rigs, speeds are limited and temperatures are controlled. Heating and air conditioning are often off entirely or only used in an economy setting.
On the motorway, conditions are entirely different: aerodynamic drag rises with the square of speed. As pace increases, the power needed climbs disproportionately, so the battery must deliver significantly more energy per kilometre.
On top of that, there are further factors such as:
- heavy use of heating or air conditioning
- roof boxes, bike racks or a fully loaded car
- gentle gradients, headwinds and wet roads
- differences in tyre compound and tyre pressure
"Models that beat their official figures on the motorway usually combine aerodynamics, thermal management and drivetrain efficiency in a particularly smart way."
What does this mean for buyers in Germany, Austria and Switzerland?
Anyone who frequently travels at 120 to 130 km/h on the motorway should treat range promises with caution. While the US results cannot be transferred one-to-one to European consumption figures, they do reveal clear patterns.
For high-mileage drivers, brands that built in reserves in the test are especially appealing - in particular German premium manufacturers. Korean brands score with predictability: if planning certainty matters, Hyundai and Kia tend to be a sensible choice.
Large, tall electric SUVs or pick-ups reach their limits more quickly on long runs, as expected. The extra energy demand from aerodynamic drag and mass hits exactly where many owners need maximum range - on holiday journeys or long business trips.
How prospective owners can judge range more reliably
Range remains one of the most important buying criteria for electric cars. A few practical steps can help prevent disappointment:
- Read reviews that include motorway testing, not just official figures.
- Pay attention to real owner experiences in forums and communities.
- Favour models that typically land slightly above their official numbers in practice.
- If long trips are frequent, consider the next battery size up.
- Be honest about driving style: anyone often travelling at 140 km/h and above will use noticeably more energy.
This also has an interesting angle for the used market. As new generations arrive, models such as the BMW i4 could appear in larger numbers as nearly new used cars. For buyers specifically seeking motorway-capable range, that could be particularly attractive.
Ultimately, the test underlines one central point: not every electric car with an impressive official range keeps that promise at higher speeds. If you understand the technical reasons and choose the right models, motorway driving can still be relaxed - with fewer charging stops.
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