What Car?

Top 10 Most Efficient Electric Cars in 2026 – Which is CHEAPEST to run?

In this ultimate countdown of the Top 10 Most Efficient Electric Cars in 2026, we crunch the numbers to find out which EV is the CHEAPEST to run?. When looking for the most efficient EVs, many buyers assume they need a massive battery pack. But big batteries add lots of weight, which is why the £15k EV that beats any Tesla might just be the smartest choice for your driveway. We reveal what that car is and break down the exact miles per kWh of the UK's most frugal electric cars. 🔔 Don't forget to subscribe! If you enjoyed this top 10 countdown, hit subscribe to keep up to date with our latest group tests and new car reviews: @whatcar 🚗 Looking for a specific model? Read our full, detailed written reviews on every electric car featured in today's video right here: http://www.whatcar.com In this video, we explain exactly how WLTP EV efficiency is calculated, factoring in the inevitable energy lost through heat during charging. We then rank the top 10 most efficient electric vehicles on sale right now. The countdown including small city cars like the retro Fiat 500e and the all-new Nissan Micra, but also practical family haulers including the Tesla Model Y and Volkswagen ID.7. Plus, we look at high-end engineering marvels like the ultra-slippery Mercedes CLA 250+ with its 483-mile range, and give you a sneak peek at the soon-to-be-launched Renault Twingo. What Car? is the UK's biggest car-buying brand and has been helping buyers for more than 50 years. Our tests are widely regarded as the most independent and in-depth. Our YouTube channel brings you trusted reviews on all types of car, plus car news, reveals and features. In-depth written reviews are available on our website whatcar.com, where you'll also find advice features and the latest new and used car deals. Follow What Car? here: LIKE What Car? on Facebook: https://goo.gl/yv5jF8 FOLLOW What Car? on Twitter: https://goo.gl/SJzmT8 Check out our full video catalog: https://bit.ly/2W81iu9 #ElectricCars #EVEfficiency #MostEfficientEVs #TeslaModel3 #MercedesCLA #DaciaSpring #WhatCar #ev2026 Video chapters: 0:00 – Intro: Why big batteries are BAD for efficiency! 1:19 – How is EV efficiency calculated? (WLTP & charging losses) 2.44 – Future efficiency champion: the new Renault Twingo 3:26 – Top 10 most efficient EVs