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BYD Sealion 7 vs XPENG G6 (2025)
Selected trimComfortChange trim300 mi · 82.5 kWh · £44,990
Selected trimStandard Range 66kWh · 2025Change trim270 mi · 66 kWh · £39,990
At a glance
In this comparison, BYD Sealion 7 stays competitive across the board, while the XPENG G6 leads on motorway range, charging speed and city driving.
Which should you choose?
Choose the XPENG G6 (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 need the best car for city driving and tight parking
How we reached the recommendation
Verdict
Our take
The XPENG G6 leads in the most categories, but each car here has its strengths.
Value
BYD
6
XPENG
6.3
Too close to call
Motorway RangeXPENG
BYD
3.1
XPENG
5.3
Family
BYD
8
XPENG
8.3
Too close to call
ChargingXPENG
BYD
5.9
XPENG
8.3
City DrivingXPENG
BYD
2.2
XPENG
3
What each car does better
See the specification differences behind the verdict, with supporting figures for each advantage.
XPENG G6
Standard Range 66kWh
- £5,000 cheaper
- 51 litres more boot space
- 65 kW faster rapid charging
- 12 min quicker 10-80% rapid charge
- 24 Wh/km more efficient
Key specifications
Compare the key specifications for your selected trims.
| Measure | BYD Sealion 7Comfort | XPENG G6Standard Range 66kWh |
|---|---|---|
| Price | £44,990 | £39,990 (better) |
| Official range | 300 miles (better) | 270 miles |
| Boot space | 520 L | 571 L (better) |
| 10-80% rapid charge | 24 min | 12 min (better) |
| 0-62 mph | 6.7 sec (better) | 6.9 sec |
Size Comparison
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BYD Sealion 7
XPENG G6
Length
BYD Sealion 74,830mm
XPENG G64,758mm-72mm
Width
BYD Sealion 71,925mm
XPENG G61,920mm-5mm
Height
BYD Sealion 71,620mm-30mm
XPENG G61,650mm
Space, size & parking
Parking & manoeuvring
Compare exterior dimensions to assess how each car fits UK parking spaces.
| Measure | BYD Sealion 7Comfort | XPENG G6Standard Range 66kWh |
|---|---|---|
| Length | 4,830 mm | 4,758 mm |
| Width (mirrors folded) | 1,925 mm | 1,920 mm (better) |
| Width with mirrors out | 2,189 mm | Not available |
| Height | 1,620 mm | 1,650 mm |
| Turning circle | 11.7 m | 11.6 m (better) |
| Clearance in a standard bayA standard UK parking bay is 2,400 mm wide. | 475 mm spare | 480 mm spare (better) |
People & luggage
Compare seating, child-seat mounting points, boot space and towing capacity.
| Measure | BYD Sealion 7Comfort | XPENG G6Standard Range 66kWh |
|---|---|---|
| Seats | 5 | 5 |
| Boot space (seats up) | 520 L | 571 L (better) |
| Boot space (seats down) | 1789 L (better) | 1374 L |
| Frunk | 58 L | Not available |
| Towing capacity (braked) | 750 kg | Not available |
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.
XPENG G6
Not enough peers to make confident percentile claims.
Full specifications
| Specification |  BYD Sealion 7 Comfort |  XPENG G6 Standard Range 66kWh |
|---|---|---|
| Dimensions | ||
| Length | 4.83m | 4.76m-72mm |
| Width | 1.93m | 1.92m-5mm |
| Width (mirrors) | 2.19m | Not available |
| Height | 1.62m | 1.65m+30mm |
| Wheelbase | 2.93m | 2.89m-40mm |
| Ground Clearance | 157mm | Not available |
| Capacity | ||
| Boot (seats up) | 520L | 571L (better) |
| Boot (seats down) | 1789L (better) | 1374L |
| Frunk | 58L | Not available |
| Seats | 5 | 5 |
| Practicality | ||
| Turning Circle | 11.7m | 11.6m (better) |
| Kerb Weight | 2,225kg | 2,065kg (better) |
| Towing Capacity | 750kg | Not available |
| Electric | ||
| Battery | 82.5kWh (better) | 66kWh |
| Range (WLTP) | 300 mi (better) | 270 mi |
| Max DC Charge | 150kW | 215kW (better) |
| Pricing | ||
| UK MSRP | £44,990 | £39,990 (better) |
| Details | ||
| Body Style | SUV | SUV |
| Available | 2025+ | 2025–2025 |
Range & charging
Range, charging & battery
Check official and estimated driving range alongside charging speeds, efficiency and battery technology.
| Measure | BYD Sealion 7Comfort | XPENG G6Standard Range 66kWh |
|---|---|---|
| Official range (WLTP) | 300 miles (better) | 270 miles |
| Estimated motorway rangeEVcarsguide estimate at sustained motorway speed. | 204 miles (better) | 193 miles |
| 10-80% rapid charge time | 24 min | 12 min (better) |
| Max rapid charge rate | 150 kW | 215 kW (better) |
| Home AC charging | 11 kW | 11 kW |
| Energy consumption | 199 Wh/km | 175 Wh/km (better) |
| Usable battery capacity | 82.5 kWh (better) | 65.3 kWh |
| Battery chemistry | LFP | LFP |
| Battery architecture | Not available | 800V |
| Heat pump | Standard | Not available |
Driving & everyday use
Performance & drivetrain
Compare acceleration, power and drivetrain specifications for the selected trims.
| Measure | BYD Sealion 7Comfort | XPENG G6Standard Range 66kWh |
|---|---|---|
| 0-62 mph | 6.7 sec (better) | 6.9 sec |
| Power | 230 kW (better) | 190 kW |
| Torque | 380 Nm | 440 Nm (better) |
| Drivetrain | RWD | RWD |
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
XPENG G6
Standard Range 66kWh
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
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 - XPENG G6 Standard Range 66kWh
Tested 2024
Adult Occupant88%
Child Occupant85%
Vulnerable Road Users81%
Safety Assist75%
Full result on euroncap.com (opens in new tab)
Warranty
Check the published battery warranty cover for each selected trim.
| Measure | BYD Sealion 7Comfort | XPENG G6Standard Range 66kWh |
|---|---|---|
| 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
XPENG G6
Used on AutoTraderLease deals
Frequently asked questions
Is the BYD Sealion 7 worth the extra £5,000 over the XPENG G6?
The BYD Sealion 7 costs £5,000 more than the XPENG G6. For that premium it adds 30 miles more WLTP range and 40 kW more power. The XPENG G6 is not just cheaper - it also offers 65 kW faster peak rapid charging, 51 litres more boot space and lower energy use, 175 versus 199 Wh/km. On EVcarsguide's combined category scores, the XPENG G6 comes out ahead overall.
Which is cheaper to own over 5 years, the BYD Sealion 7 or the XPENG G6?
The XPENG G6 is £5,000 cheaper to buy. Running costs are almost identical - about £192 a year either way, at 8,000 miles on an off-peak home tariff. Add 5 years of charging and the XPENG G6 comes out roughly £5,120 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 XPENG G6 like on a long motorway trip?
EVcarsguide estimates a real-world motorway range of about 204 miles for the BYD Sealion 7 and 193 miles for the XPENG G6 - effectively matched, and both well below their WLTP figures because sustained high speed is the hardest case for an EV. A rapid charge to 80% takes around 24 minutes in the BYD Sealion 7 and 12 in the XPENG G6, so the XPENG G6 loses less time at each stop.
Which is easier to park and drive in town, the BYD Sealion 7 or the XPENG G6?
The two are within 5 mm on width, so neither is meaningfully easier to thread into a tight space. In a standard 2,400 mm bay that leaves about 480 mm of total clearance for the XPENG G6 and about 475 mm of total clearance for the BYD Sealion 7.
Which battery will hold up better as a used buy, the BYD Sealion 7 or the XPENG G6?
Over a 8-year ownership window EVcarsguide's degradation model projects roughly 90% battery health for the BYD Sealion 7 and 90% for the XPENG G6. That is close enough that capacity loss should not decide between them. Both use LFP-type cells, which are happy charged to 100% every day. 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 XPENG G6 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 XPENG G6 rank among the best family EVsWhere the BYD Sealion 7 and XPENG G6 rank among the best electric SUVsWhere the BYD Sealion 7 and XPENG G6 rank among the best motorway EVsWhere the BYD Sealion 7 and XPENG G6 rank among the best city EVsWhere the BYD Sealion 7 and XPENG G6 rank among the cheapest EVs to runWhere the BYD Sealion 7 and XPENG G6 rank among EVs with the biggest boots
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 XPENG G6 (2025 on): Original vs Updated, Warranty & What to Pay
A used XPENG G6 buyer’s guide: the original 66 kWh and 87.5 kWh cars vs the updated 2026 G6, battery warranty, a young brand and dealer network, real-world range, what owners report, what to pay and a printable checklist.
Data accuracy
Specs are sourced from manufacturer websites and manually reviewed. These figures were last verified .