Electric vehicle (EV) range drops significantly in cold weather. A recent megatest by automotive journalists put five long-range EVs—Audi A6 Avant e-tron, Mercedes-Benz CLA 250+ Sport, Tesla Model Y, Kia EV4, and MG IM5 Long Range—through brutal winter conditions to determine real-world performance. The test focused on whether EVs can still deliver the 300+ mile range promised by manufacturers when facing real-world cold, rain, and charging challenges.
The Contenders and Their Promises
The cars ranged from the budget-friendly Tesla Model Y (314-mile official range) to the luxury Audi A6 Avant e-tron (430-mile claim). The Mercedes CLA 250+ Sport stood out with an advertised 484-mile range, while the MG IM5 Long Range packed the most power (401bhp) and largest battery (96.5kWh). The Kia EV4 represented the most affordable option, priced under £37,000 to qualify for government incentives.
These figures matter because EV adoption hinges on buyers trusting advertised ranges. Cold temperatures, highway speeds, and inefficient charging can quickly erode those numbers, leading to “range anxiety”—the fear of being stranded. The test aimed to quantify that reality.
Charging Challenges and Initial Results
The first test was a cold charge. The Kia EV4 struggled, taking over 90 minutes to reach 91% charge. The MG IM5 initially refused to DC charge, requiring a workaround to achieve 98%. The Tesla Model Y charged fastest, reaching 100% in 58 minutes. These early hiccups highlighted two key lessons: cold weather slows charging significantly, and software restrictions protect batteries by throttling power as they near full capacity.
On the Road: Performance and Comfort
The Audi A6 Avant e-tron impressed with its smooth ride and strong acceleration (0-62mph in 5.4 seconds). However, the overly aggressive head-up display was distracting. The Mercedes-Benz CLA 250+ Sport prioritized comfort, offering a plush ride but a bland interior. The Kia EV4 proved spacious but suffered from overbearing driver-assistance systems. The MG IM5’s efficiency lagged behind, while the Tesla was not tested yet.
Key Takeaways
The test revealed that official range claims are optimistic in winter conditions. The Mercedes CLA 250+ Sport showed the most consistent efficiency, while the Kia EV4 struggled with charging and driver aids. The MG IM5, despite its power and battery size, lagged in efficiency. The Audi A6 Avant e-tron offered a refined experience but fell short of its advertised range.
The final results will depend on the full 36-hour loop, including peak district roads and highway runs, but this initial phase underscores the importance of realistic expectations when owning an EV in colder climates.
