BYD Sealion 7 vs Kia EV6: Price, Range and Charging Compared

All figures here are WLTP, and neither car should ever be read against a Chinese CLTC figure. The Sealion 7's WLTP range varies with trim and battery: 300 miles for the Comfort on its 82.5kWh pack, 283 miles for the heavier all-wheel-drive Design on the same battery, and 312 miles for the Excellence on a larger 91.3kWh pack. The Kia EV6's entry Air, on its own 84.0kWh battery, covers 361 miles WLTP, further than any Sealion 7 trim including the larger-battery Excellence. DC charging tells a different story. BYD publishes 150kW for the Comfort and Design, rising to 230kW on the Excellence's 800-volt architecture, and quotes a 10 to 80% top-up in around 32 minutes on the smaller battery and 24 minutes on the larger one. Kia has not published a peak DC-charging figure for the EV6 at all: a footnote naming the charger needed to hit its advertised charge time is not the same thing as a rating for the car itself.

Insurance and company car tax are two of the biggest ongoing costs of either car, and only one side of this comparison is available to check. The Sealion 7 sits in insurance group 45 for the Comfort, rising to 47 for the Design and 49 for the Excellence. On the 2026 to 2027 Benefit in Kind schedule, the Comfort's roughly £46,935 P11D value works out at about £31 a month for a 20% taxpayer at the 4% zero-emission rate. Kia has published no insurance group for the EV6 among the sources this comparison uses, and no P11D-based company car tax figure either, so a buyer weighing the two on running costs should get both figures directly from an insurer and a fleet provider before ordering.

BYD backs the Sealion 7 with a 6-year or 93,750-mile vehicle warranty and an 8-year or 155,000-mile battery warranty with a 70% capacity floor. That battery figure is the current one, confirmed by BYD's own January 2026 press release and by independent reporting, even though BYD's UK website itself still showed the earlier 125,000-mile figure as of July 2026. Kia's EV6 carries the brand's standard 7-year or 100,000-mile warranty on the vehicle, with a separate high-voltage battery warranty of 8 years or 100,000 miles and its own 70% capacity guarantee for cars registered from January 2024. So Kia's vehicle cover runs a year and 6,250 miles longer, while BYD's battery cover runs 55,000 miles further than Kia's. Both earn 5-star Euro NCAP ratings on different tests: BYD's 2025 result scored 87% adult occupant, 93% child occupant, 76% vulnerable road users and 79% safety assist; Kia's 2022 result scored 90% adult, 86% child, 64% vulnerable road users and 87% safety assist. Neither car leads across all four categories.