One of the biggest factors affecting electric vehicle range is also one of the simplest: speed. Real-world driving data continues to show that sustained high-speed travel dramatically reduces how far an EV can go on a single charge, while slower, steady driving can significantly improve efficiency.

During a recent European EV road trip, vehicles driven mostly at highway speeds of about 130 km/h saw their range drop by roughly 40% compared to official WLTP estimates. In contrast, when those same vehicles traveled primarily on secondary roads at 90 km/h or lower, they were able to closely match, and sometimes exceed, their rated efficiency and range figures.

One clear example came from an efficient compact EV that achieved a theoretical range of about 377 km when driven at lower speeds, including mountainous routes. When driven mainly on flat highways at higher speeds, its real-world range fell to approximately 223 km. Similar results were observed across all vehicles in the test, including advanced models built on modern 800-volt platforms.

This phenomenon highlights a fundamental reality of EV physics. Higher speeds increase aerodynamic drag dramatically, which forces the vehicle to consume far more energy to maintain pace. Even highly efficient electric motors cannot overcome the exponential rise in air resistance at highway speeds. Headwinds, added passengers, and cargo further amplify the effect.

The takeaway for EV drivers is straightforward. Slowing down extends range. Driving at or below posted speed limits reduces energy consumption, shortens charging stops, and makes long-distance EV travel more predictable. While larger batteries and advanced platforms help, the most effective range extender remains a lighter right foot.

For drivers who frequently travel long distances at high speeds, this reality helps explain the growing interest in plug-in hybrids and extended-range EVs. For everyone else, the simplest strategy still wins: slow down, go farther, and spend less time charging.