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BYD Sealion 7 vs Polestar 3 (2024-2025)
Selected trimComfortChange trim300 mi · 82.5 kWh · £44,990
Selected trimLong Range Single Motor · 2025-26Change trim438 mi · 111 kWh · £69,900
At a glance
In this comparison, BYD Sealion 7 leads on family practicality, while the Polestar 3 leads on motorway range, charging speed and running costs.
Which should you choose?
Choose the BYD Sealion 7 if...
- you need the most family-friendly option with good safety and space
Choose the Polestar 3 (2024-2025) if...
- you do long motorway journeys - it has the best estimated real-world range at speed
- you need the fastest charging of these options
- you want the lowest running costs - from just 2.2p per mile on off-peak electricity
How we reached the recommendation
Verdict
Our take
The Polestar 3 leads in the most categories, but each car here has its strengths.
Value
BYD
6
Polestar
5.7
Too close to call
Motorway RangePolestar
BYD
3.1
Polestar
8.9
FamilyBYD
BYD
8
Polestar
6.8
ChargingPolestar
BYD
5.9
Polestar
8
Cost Per MilePolestar
BYD
0.8
Polestar
4.5
What each car does better
See the specification differences behind the verdict, with supporting figures for each advantage.
Polestar 3
Long Range Single Motor
- 138 miles more WLTP range
- 100 kW faster rapid charging
- 1.3s quicker 0-62 mph
- 1450 kg more towing capacity
Key specifications
Compare the key specifications for your selected trims.
| Measure | BYD Sealion 7Comfort | Polestar 3Long Range Single Motor |
|---|---|---|
| Price | £44,990 (better) | £69,900 |
| Official range | 300 miles | 438 miles (better) |
| Boot space | 520 L (better) | 484 L |
| 10-80% rapid charge | 24 min | 22 min (better) |
| 0-62 mph | 6.7 sec | 5.4 sec (better) |
Size Comparison
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BYD Sealion 7
Polestar 3
Length
BYD Sealion 74,830mm-70mm
Polestar 34,900mm
Width
BYD Sealion 71,925mm-43mm
Polestar 31,968mm
Height
BYD Sealion 71,620mm-2mm
Polestar 31,622mm
Space, size & parking
Parking & manoeuvring
Compare exterior dimensions to assess how each car fits UK parking spaces.
| Measure | BYD Sealion 7Comfort | Polestar 3Long Range Single Motor |
|---|---|---|
| Length | 4,830 mm | 4,900 mm |
| Width (mirrors folded) | 1,925 mm (better) | 1,968 mm |
| Width with mirrors out | 2,189 mm | 2,120 mm (better) |
| Height | 1,620 mm | 1,622 mm |
| Turning circle | 11.7 m (better) | 11.8 m |
| Clearance in a standard bayA standard UK parking bay is 2,400 mm wide. | 475 mm spare (better) | 432 mm spare |
People & luggage
Compare seating, child-seat mounting points, boot space and towing capacity.
| Measure | BYD Sealion 7Comfort | Polestar 3Long Range Single Motor |
|---|---|---|
| Seats | 5 | 5 |
| ISOFIX child-seat points | Not available | 2 |
| Boot space (seats up) | 520 L (better) | 484 L |
| Boot space (seats down) | 1789 L (better) | 1411 L |
| Frunk | 58 L | Not available |
| Towing capacity (braked) | 750 kg | 2,200 kg (better) |
How each stacks up
Percentile ranks against UK EVs of the same body style.
BYD Sealion 7
- One of 33 of 233 UK EVs in our catalogue with V2L (vehicle-to-load) support.
- At 4,830 mm, longer than 80% of SUVs we track.
Polestar 3
- 438 mile WLTP range, longer than 100% of SUVs we track.
- Peak DC charging of 250 kW, faster than 80% of SUVs in our catalogue.
- At 4,900 mm, longer than 85% of SUVs we track.
Full specifications
| Specification |  BYD Sealion 7 Comfort |  Polestar 3 Long Range Single Motor |
|---|---|---|
| Dimensions | ||
| Length | 4.83m | 4.90m+70mm |
| Width | 1.93m | 1.97m+43mm |
| Width (mirrors) | 2.19m | 2.12m-69mm |
| Height | 1.62m | 1.62m+2mm |
| Wheelbase | 2.93m | 2.98m+55mm |
| Ground Clearance | 157mm | 202mm+45mm |
| Capacity | ||
| Boot (seats up) | 520L (better) | 484L |
| Boot (seats down) | 1789L (better) | 1411L |
| Frunk | 58L | Not available |
| Seats | 5 | 5 |
| Practicality | ||
| Turning Circle | 11.7m (better) | 11.8m |
| Kerb Weight | 2,225kg (better) | 2,545kg |
| Towing Capacity | 750kg | 2,200kg (better) |
| Electric | ||
| Battery | 82.5kWh | 111kWh (better) |
| Range (WLTP) | 300 mi | 438 mi (better) |
| Max DC Charge | 150kW | 250kW (better) |
| Pricing | ||
| UK MSRP | £44,990 (better) | £69,900 |
| Details | ||
| Body Style | SUV | SUV |
| Available | 2025+ | 2025–2026 |
Range & charging
Range, charging & battery
Check official and estimated driving range alongside charging speeds, efficiency and battery technology.
| Measure | BYD Sealion 7Comfort | Polestar 3Long Range Single Motor |
|---|---|---|
| Official range (WLTP) | 300 miles | 438 miles (better) |
| Estimated motorway rangeEVcarsguide estimate at sustained motorway speed. | 204 miles | 365 miles (better) |
| 10-80% rapid charge time | 24 min | 22 min (better) |
| Max rapid charge rate | 150 kW | 250 kW (better) |
| Home AC charging | 11 kW | 11 kW |
| Energy consumption | 199 Wh/km | Not available |
| Usable battery capacity | 82.5 kWh | 107 kWh (better) |
| Battery chemistry | LFP | NMC |
| Battery architecture | Not available | 800V |
| Heat pump | Standard | Standard |
Driving & everyday use
Performance & drivetrain
Compare acceleration, power and drivetrain specifications for the selected trims.
| Measure | BYD Sealion 7Comfort | Polestar 3Long Range Single Motor |
|---|---|---|
| 0-62 mph | 6.7 sec | 5.4 sec (better) |
| Power | 230 kW (better) | 220 kW |
| Torque | 380 Nm | 740 Nm (better) |
| Drivetrain | RWD | AWD |
What the critics say
See how UK motoring publications rate each car in their road tests. One car has more review coverage than the other - we show that rather than guessing.
BYD Sealion 7
Comfort
6.6/10
average across 6 reviews
- Parkers3.9/5
- Auto Express3.5/5
- Electrifying.com7/10
Polestar 3
Long Range Single Motor
No critic reviews gathered yet for this car.
Watch the reviews
Watch selected video reviews here, or visit each model page for the full collection.
Reviews and videos discuss each model overall; the specifications above apply to your selected trims.
Prices & deals
New and used prices
Current pricing and recent used-market behaviour.
| Measure | BYD Sealion 7Comfort | Polestar 3Long Range Single Motor |
|---|---|---|
| Used market price from | £30,211 | £41,950 |
| Average used price | £30,993 | £43,990 |
Used prices are indicative figures gathered from independent UK dealer listings and change frequently.
Calculate your real costs
For a useful running-cost comparison, factor in your mileage, charging access and current petrol or diesel car alongside the EV estimate.
Compare with petrol or diesel
Compare purchase price, energy, road tax and maintenance with a petrol or diesel alternative.
Calculate company-car tax
Work out monthly Benefit-in-Kind using current and future HMRC rates.
Cost per mile
Compare EV charging costs per mile with petrol and diesel using your charging options.
Check a lease quote
Assess the effective monthly cost alongside the list price and expected depreciation.
Safety & ownership confidence
Euro NCAP - BYD Sealion 7 Comfort
Tested 2025
Adult Occupant87%
Child Occupant93%
Vulnerable Road Users76%
Safety Assist79%
Full result on euroncap.com (opens in new tab)
Euro NCAP - Polestar 3 Long Range Single Motor
Tested 2025
Adult Occupant90%
Child Occupant93%
Vulnerable Road Users79%
Safety Assist83%
Full result on euroncap.com (opens in new tab)
Warranty
Check the published battery warranty cover for each selected trim.
| Measure | BYD Sealion 7Comfort | Polestar 3Long Range Single Motor |
|---|---|---|
| Battery warranty | 8 years | 8 years |
| Battery warranty distance | 250,000 km (better) | 160,934 km |
Buying options
Get a quote
BYD Sealion 7
Used on AutoTraderLease deals
Polestar 3
Used on AutoTraderLease deals
Frequently asked questions
Is the Polestar 3 worth the extra £24,910 over the BYD Sealion 7?
The Polestar 3 costs £24,910 more than the BYD Sealion 7. For that premium it adds 138 miles more WLTP range, 100 kW faster peak rapid charging and a 1.3s quicker 0-62mph time. On EVcarsguide's combined category scores, the Polestar 3 comes out ahead overall.
Which is cheaper to own over 5 years, the BYD Sealion 7 or the Polestar 3?
The BYD Sealion 7 is £24,910 cheaper to buy. The Polestar 3 is cheaper to charge, roughly £176 a year versus £216 for the BYD Sealion 7, at 8,000 miles on an off-peak home tariff. Add 5 years of charging and the BYD Sealion 7 comes out roughly £24,710 cheaper overall. These figures cover list price and home charging only - insurance, servicing, tyres and depreciation will move the real total.
What are the BYD Sealion 7 and Polestar 3 like on a long motorway trip?
EVcarsguide estimates a real-world motorway range of about 204 miles for the BYD Sealion 7 and 365 miles for the Polestar 3 - both below their WLTP figures, because sustained high speed is the hardest case for an EV. The Polestar 3 goes roughly 162 miles further between charging stops. Both rapid-charge to 80% in a similar time, around 22-24 minutes.
Which is easier to park and drive in town, the BYD Sealion 7 or the Polestar 3?
The BYD Sealion 7 is the easier car for tight UK car parks: it is 43 mm narrower than the Polestar 3. In a standard 2,400 mm bay that leaves about 475 mm of total clearance for the BYD Sealion 7 and about 432 mm of total clearance for the Polestar 3.
Which battery will hold up better as a used buy, the BYD Sealion 7 or the Polestar 3?
Over a 8-year ownership window EVcarsguide's degradation model projects roughly 90% battery health for the BYD Sealion 7 and 84% for the Polestar 3. That gives the BYD Sealion 7 a modest edge in retained real-world range. The BYD Sealion 7's LFP-type pack tolerates daily 100% charging, while the Polestar 3's NMC-type pack lasts longest kept to about 80% for everyday use. Both batteries carry a 8-year manufacturer warranty.
Go deeper on each car
Visit the full model pages for owner feedback, expert reviews, used prices and battery-health information.
Compare against other rivals
Compare similarly sized and priced electric cars before finalising your shortlist.
More BYD Sealion 7 comparisons
More Polestar 3 comparisons
See both cars in our rankings
EVcarsguide scores every verified EV on price, range, family use and running costs. Here is where this pair appears.
Where the BYD Sealion 7 and Polestar 3 rank among the best family EVsWhere the BYD Sealion 7 and Polestar 3 rank among the best electric SUVsWhere the BYD Sealion 7 and Polestar 3 rank among long-range EVsWhere the BYD Sealion 7 and Polestar 3 rank among the best motorway EVsWhere the BYD Sealion 7 and Polestar 3 rank among the best city EVsWhere the BYD Sealion 7 and Polestar 3 rank among the cheapest EVs to run
If neither is quite right
Explore other verified electric cars that may better suit the priorities this pair does not meet.
Further reading
Explore buying and ownership guides to help you choose between these electric cars.
GuideBuying a Used BYD Sealion 7 (2025 on): Comfort, Design or Excellence & What to Pay
A used BYD Sealion 7 buyer’s guide: Comfort RWD, Design AWD and Excellence AWD, the steep depreciation, BYD’s 8-year battery warranty, charging speeds, real-world range, what owners report and a printable checklist.
GuideBuying a Used Polestar 3 (2024 on): 400 vs 800 Volt, Recalls, Real Range & What to Pay
A used Polestar 3 buyer’s guide: the 2024-2025 111 kWh car vs the 2026 800-volt update, the wiring recall, real-world range, software, what to pay and a printable checklist.
Data accuracy
Specs are sourced from manufacturer websites and manually reviewed. These figures were last verified .