When people talk about electric cars, the conversation almost always focuses on range. Buyers often want to know how far an EV can travel on a full charge, especially if they regularly drive long distances or commute many miles each day.
However, there is another number that can be just as important — efficiency.
Electric vehicle efficiency is measured in miles per kilowatt-hour (mi/kWh). In simple terms, it shows how far a car can travel using a single unit of electricity. The higher the number, the further the vehicle can go using the same amount of power.
While range still matters, efficiency can play a major role in real-world running costs.
Why Efficiency Can Matter More Than Range
A vehicle with a very large battery may offer impressive range figures, but bigger batteries also require more electricity to recharge.
That means drivers could end up paying more to fill the battery compared with a smaller, more efficient electric car.
For many drivers charging at home in the UK, this becomes even more relevant because cheap overnight energy tariffs often only run for around five to seven hours. If a vehicle has a very large battery, it may not always fully recharge within that discounted charging window.
Because of this, bigger batteries and longer range aren’t always automatically better. In some cases, a highly efficient EV with a smaller battery can be cheaper and easier to run day-to-day.
Some of the Most Efficient Electric Cars on Sale
Based on official WLTP efficiency figures, several electric cars stand out for delivering excellent miles per kWh.
Mercedes CLA 250+ Sport Edition
Efficiency: 5.0 miles per kWh
Dacia Spring Extreme 100
Efficiency: 5.0 miles per kWh
Tesla Model 3 Rear-Wheel Drive
Efficiency: 4.8 miles per kWh
Fiat 500e Icon 24kWh
Efficiency: 4.8 miles per kWh
Tesla Model Y Rear-Wheel Drive
Efficiency: 4.5 miles per kWh
These vehicles demonstrate how modern EV technology can deliver strong efficiency while still offering practical everyday range.
DM News Commentary
As electric vehicles become more common, many drivers are starting to look beyond the headline range figure and instead focus on how efficiently a car uses electricity.
For drivers covering high mileage — including those working in transport, ride-hailing or private hire — efficiency can make a significant difference to running costs over time.
With many UK energy tariffs offering limited overnight cheap charging windows, being able to top up most or all of the battery during those hours can sometimes matter more than having the largest battery available.
In the end, the most practical EV for many drivers may not be the one with the longest range, but the one that delivers the most miles from every unit of electricity.
Thanks for visiting DM News! If you’ve got a question, story, or anything you’d like to say, head over to DriverMatty.com — I’d love to hear from you! And while you’re there, don’t forget to check out my other websites and social media channels.
