BYD New Cars Review 2026: Prices, Warranty and the Missing Grant

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A new BYD starts at £18,650 on the road for a Dolphin Surf Active and runs to £58,990 for a Sealion 7 Excellence, and every one of them carries six years or 93,750 miles of vehicle warranty — twice the term most of the established marques offer. The battery is covered for eight years or 125,000 miles on top of that.

BYD has been selling cars in Britain since March 2023 and passed 100,000 UK registrations on 29 July 2026, from a network that had reached 143 sites by that date. Its own year-end release put 2025 at 51,422 registrations and a 2.55% market share, against 0.45% the year before.

The prices below come from BYD's own UK media site rather than from its consumer pages, which are closed to automated reading. Each one is an on-the-road figure including VAT, and each is a starting point for a trim rather than a quote for a particular car.

What £18,650 buys, and where the ladder ends

The Dolphin Surf Active opens the range at £18,650 with a 30kWh Blade Battery, a 65kW motor and 137 miles of WLTP combined range. Moving up to the 43.2kWh pack costs £3,300: the Boost is £21,950 and quotes 200 miles, and the Comfort at £23,950 trades range back down to 193 miles for a 115kW motor instead of a 65kW one. Three-phase 11kW AC charging is standard across all three, DC peaks at 65kW on the Active and 85kW on the other two, and BYD quotes 30 minutes from 10–80% on every trim.

Above that sits the Dolphin proper at £26,195 for a 44.9kWh Active, £27,195 for the 130kW Boost, and £30,195 or £31,695 for the 60.4kWh Comfort and Design, both rated at 265 miles. The Atto 2 arrived in August 2025 at £30,850 for a 51.1kWh Boost quoting 214 miles, and £34,950 for a 64.8kWh Comfort quoting 261 miles.

The top of the range is where the money is. The Seal saloon is £45,695 in rear-drive Design form, rated at 354 miles, and £48,695 for the 390kW Excellence AWD at 323 miles. The Sealion 7 SUV runs £46,990, £51,990 and £58,990 across Comfort RWD, Design AWD and Excellence AWD, the last of those on a 91.3kWh pack good for 312 miles.

One wrinkle worth knowing before you argue with a salesperson about battery size. BYD's own Seal page gives 82.5kWh in its technical data table and 80kWh in the prose above it, and labels neither as gross or usable. The gap is small and the explanation is probably mundane, but the document does not say which number is which.

The discount every rival gets, and BYD does not

The Electric Car Grant takes £3,750 off a Band 1 car and £1,500 off a Band 2 car at the point of sale. The government publishes the list of approved models itself, and on 15 October 2026 it held 20 entries in Band 1 — among them the Nissan Leaf, the Renault 5 and Megane, the Kia EV4, the Hyundai Kona Electric and both small BMWs — and roughly fifty in Band 2, covering most of Stellantis, Volkswagen, Skoda and Kia. No BYD model appears in either band.

Price is not the reason. The cap is £37,000 recommended retail, measured inclusive of VAT, mandatory extras, delivery and administration charges and the battery even where it is leased, with an interpolation family allowed up to £42,000 if one version in it comes under £37,000. A Dolphin Surf at £18,650 is barely half the cap, and six of the trims listed above sit comfortably beneath it.

What remains is the rest of the test, and it is worth reading because it explains the shape of the eligible list. An applicant must meet one of two sustainability criteria: a target verified by the Science Based Targets initiative, where a commitment alone is not accepted, or an assessment at Management Quality Level 4 or higher under the Transition Pathway Initiative with carbon performance at or below the sector 1.5°C benchmark for 2050. Separately, each vehicle is scored on where it is built, and the weighting is lopsided: battery production counts for 70% of the environmental score and final vehicle assembly for 30%, both measured against national electricity carbon intensity using the IEA's 2023 figures. A car built where the grid is dirtier scores worse.

BYD's absence is a fact; which limb of the test it turns on is not published, and this page is not going to guess. What a buyer can take from it is concrete enough. A Renault 5 at the 52kWh size comes down by £3,750 and a Dolphin Surf does not, so the gap between them is £3,750 narrower than the window stickers suggest. Ask the retailer what discount is on the table, because BYD has been funding its own offers rather than drawing on the scheme.

Six years and 93,750 miles, which outlasts most of the field

BYD's published warranty is six years or 150,000km — 93,750 miles — whichever comes first, with the drive unit covered for eight years or 150,000km and the traction battery for eight years or 200,000km, which BYD states as 125,000 miles. Set that against the three years and 60,000 miles that is still the standard offer from the German marques and the arithmetic favours a high-mileage driver heavily: a 20,000-mile year exhausts a 60,000-mile warranty inside year three, and leaves BYD's running until the end of year four.

The battery claim rests on cell chemistry rather than on a generous policy. BYD builds its own Blade packs on lithium iron phosphate, and the warranty page states a design life of over 5,000 charge and discharge cycles. On a 43.2kWh Dolphin Surf, 5,000 cycles is a number no private owner will approach.

Two things the page does not do. It attaches no figure to roadside assistance — the cover is described as including on-the-spot repair and towing, with no period or mileage attached to it — and it publishes no paint or anti-corrosion term at all, which most manufacturers state as a matter of course. The page also says the terms "may depend on model" without setting out the per-model table in any readable form, so the right move before signing is to ask for the warranty booklet for the specific car rather than relying on the headline figures.

One condition is stated plainly and is worth taking seriously: "If the vehicle isn't serviced to the manufacture recommendation it will invalidate your BYD Warranty." Six years of cover is worth having and it is conditional on six years of main-dealer-standard servicing, for which BYD publishes no price.

The tax line the Seal U DM-i misses by £95

Vehicle excise duty is where a list price quietly becomes a bigger number, and BYD's range sits across the line in an unusually instructive way. The expensive car supplement adds £440 a year for five years — £2,200 in total — to any car whose list price exceeds £40,000, or £50,000 where the car is electric. It is charged from the second time the vehicle is taxed, so it does not appear in the showroom conversation at all.

Run BYD's own ladder against those two thresholds and the results split by fuel. Of the fourteen electric derivatives priced above, exactly two cross the £50,000 line: the Sealion 7 Design AWD at £51,990 and the Excellence AWD at £58,990. The Seal Excellence AWD escapes by £1,305 and everything below it is clear by a wide margin.

The plug-in hybrids are judged against the lower threshold, because £50,000 applies only to zero-emission cars, and that produces the sharpest number on this page. The Seal U DM-i Design all-wheel drive is priced at £39,905. That is £95 below £40,000. A single factory-fitted option, or any dealer-supplied extra that lands in the list price, tips it over and costs the buyer £2,200 across the following five years — a return of roughly twenty-three pounds of tax for every pound of option. Anyone ordering that car should ask for the list price in writing before the order is placed.

The first-year rate runs the other way and favours BYD. A zero-emission car pays £10 in its first year against £115 for a plug-in hybrid emitting 1–50g/km, and both then join the £200 standard rate. The first-year saving on an electric BYD is real but small; the supplement is the figure that moves the total.

Half the range now burns petrol

BYD arrived in Britain as an electric-only brand and is not one now. Its franchised retailers list fifteen model lines, and seven of them are plug-in hybrids or range-extenders: the Dolphin G DM-i, Atto 2 DM-i, Seal U DM-i, Sealion 5 DM-i, Seal 6 DM-i, Seal 6 DM-i Touring and the Shark DMO pick-up, alongside a Ti 7 DM-p. BYD's own July 2026 release described a line-up that had gone "from one model to ten" in three years; the retail list has moved on again since.

The hybrids are the cheaper way into the larger cars. A Seal U DM-i Boost is £33,205 and quotes 49.7 miles of electric running and 671 miles on a full tank and a full battery, which is a usable commuting range on electricity with no range anxiety on a long trip. The all-wheel-drive Design is £39,905. Against the £46,990 entry price of the all-electric Sealion 7, the hybrid undercuts by £13,785.

There are two costs to that choice and neither is flagged at the point of sale. The plug-in hybrids face the £40,000 tax threshold rather than £50,000, as above. And they are outside the Electric Car Grant entirely by definition, which blunts the comparison between a BYD hybrid and a grant-eligible battery car of similar money. BYD's December 2025 figures record a 12.01% share of combined BEV and PHEV registrations, which is the honest way to describe a brand now selling both.

Nobody publishes who lends you the money

On most manufacturer pages the finance arm is easy to name: a captive lender with its own FCA firm reference, its own complaints ladder and its own regulatory history. BYD does not present one to a British buyer in any form this page could verify.

BYD's consumer site is closed to automated reading, so its finance terms could not be read. The franchised dealer group that does publish terms, Marshall Motor Group Limited, describes itself as "a credit-broker not a lender", operating under FCA firm reference 310503, and says an application goes to "our panel of lenders to see if they can offer you finance" without naming a single member of that panel or publishing a representative APR. The advertised offers run through the dealer: a Dolphin G DM-i Active at £275 a month with a £279 customer deposit at 2.9% APR representative, and an Atto 2 DM-i Boost at £329 a month with a £329 deposit at the same rate.

A Companies House search returns no BYD-named company in Britain carrying a finance or leasing activity. The only substantial BYD entity on the register is BYD (U.K.) CO., LTD., number 08458577, incorporated 22 March 2013, whose activities are listed as the sale and repair of motor vehicles and electrical installation, with accounts most recently made up to 31 December 2024. That is consistent with finance being arranged entirely through third-party lenders at dealer level, but it is not proof of it, and the arrangement should be treated as unverified until the paperwork is in front of you. Ask in writing who the lender is, what the APR is on the specific agreement, and what the total amount payable comes to.

Crash scores, and the scale behind a three-year-old brand

Euro NCAP has rated the range well. The Sealion 7 was assessed in 2025 and published on 9 April 2025 at five stars: 87% adult occupant, 93% child occupant, 76% vulnerable road users and 79% safety assist. The Dolphin Surf also took five stars, published 8 September 2025, which is a good result for the cheapest car in the range.

The Sealion 7's weaknesses are specific and worth knowing rather than being a reason to avoid it. Rear passenger chest protection in the full-width rigid barrier test was rated weak on dummy compression readings. Pedestrian and cyclist head protection was poor on the stiff windscreen pillars and at the base of the screen. Autonomous braking for pedestrians struck at the rear of the car was marginal, as was cyclist dooring prevention, which only warns the driver. Driver monitoring scored 0.9 of a possible 2 points.

On scale, BYD's own numbers are the only ones worth quoting, and they are substantial for a brand that sold its first UK car in March 2023. Full-year 2025 came in at 51,422 registrations and 2.55% of the market, up from 0.45% in 2024, with December alone at 7,683. The hundred-thousandth UK registration was announced on 29 July 2026, by which point the retail network stood at 143 sites. A car bought today is not an orphan, and the warranty behind it is written by a company selling at that rate.

Figures were taken from each provider's own published terms on 17 October 2026. Variable rates can change at any time — confirm the current rate with the provider before applying.