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.
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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.
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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