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BYD Seal vs Kia EV4
Selected trimDesignChange trim354 mi · 82.5 kWh · £45,730
Selected trimStandard Range 58.3kWhChange trim270 mi · 58.3 kWh · £34,745
At a glance
In this comparison, BYD Seal leads on value for money, while the Kia EV4 leads on motorway range, family practicality and charging speed.
Which should you choose?
Choose the BYD Seal if...
- you want the most for your money - best overall spec per pound
Choose the Kia EV4 if...
- you do long motorway journeys - it has the best estimated real-world range at speed
- you need the most family-friendly option with good safety and space
- you need the fastest charging of these options
- you want the lowest running costs - from just 1.8p per mile on off-peak electricity
- you need the best car for city driving and tight parking
How we reached the recommendation
Verdict
Our take
The Kia EV4 wins almost every category - it's the clear choice unless price is the deciding factor.
ValueBYD
BYD
6.3
Kia
5.6
Motorway RangeKia
BYD
3.1
Kia
5.9
FamilyKia
BYD
6.7
Kia
7.9
ChargingKia
BYD
2.4
Kia
6
Cost Per MileKia
BYD
3.4
Kia
8.4
City DrivingKia
BYD
3.6
Kia
5.7
What each car does better
See the specification differences behind the verdict, with supporting figures for each advantage.
Key specifications
Compare the key specifications for your selected trims.
Size Comparison
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BYD Seal
Kia EV4
Length
BYD Seal4,800mm
Kia EV44,430mm-370mm
Width
BYD Seal1,875mm
Kia EV41,860mm-15mm
Height
BYD Seal1,460mm-25mm
Kia EV41,485mm
Space, size & parking
Parking & manoeuvring
Compare exterior dimensions to assess how each car fits UK parking spaces.
| Measure | BYD SealDesign | Kia EV4Standard Range 58.3kWh |
|---|---|---|
| Length | 4,800 mm | 4,430 mm |
| Width (mirrors folded) | 1,875 mm | 1,860 mm (better) |
| Width with mirrors out | 2,150 mm | Not available |
| Height | 1,460 mm | 1,485 mm |
| Turning circle | 11.2 m | 10.9 m (better) |
| Clearance in a standard bayA standard UK parking bay is 2,400 mm wide. | 525 mm spare | 540 mm spare (better) |
People & luggage
Compare seating, child-seat mounting points, boot space and towing capacity.
How each stacks up
Percentile ranks against UK EVs of the same body style.
BYD Seal
- One of 33 of 232 UK EVs in our catalogue with V2L (vehicle-to-load) support.
- 11.2 m turning circle, tighter than 85% of saloon EVs in our database.
Kia EV4
- At 4,430 mm, longer than 95% of hatchback EVs we track.
- 270 mile WLTP range, longer than 90% of hatchback EVs we track.
- Eligible for the full £3,750 UK Electric Car Grant, one of 8 hatchback EVs we track that qualifies for the top band.
Full specifications
| Specification |  BYD Seal Design |  Kia EV4 Standard Range 58.3kWh |
|---|---|---|
| Dimensions | ||
| Length | 4.80m | 4.43m-370mm |
| Width | 1.88m | 1.86m-15mm |
| Width (mirrors) | 2.15m | Not available |
| Height | 1.46m | 1.49m+25mm |
| Wheelbase | 2.92m | 2.72m-200mm |
| Capacity | ||
| Boot (seats up) | 400L | 435L (better) |
| Frunk | 53L | Not available |
| Seats | 5 | 5 |
| Practicality | ||
| Turning Circle | 11.2m | 10.9m (better) |
| Kerb Weight | 2,055kg | 1,825kg (better) |
| Towing Capacity | 750kg | Not available |
| Electric | ||
| Battery | 82.5kWh (better) | 58.3kWh |
| Range (WLTP) | 354 mi (better) | 270 mi |
| Max DC Charge | 150kW (better) | 127kW |
| Pricing | ||
| UK MSRP | £45,730 | £34,745 (better) |
| Price after EV grant | £45,730 (not eligible) | £30,995 (-£3,750) |
| Details | ||
| Body Style | Saloon | Hatchback |
| Available | 2023+ | 2025+ |
Range & charging
Range, charging & battery
Check official and estimated driving range alongside charging speeds, efficiency and battery technology.
| Measure | BYD SealDesign | Kia EV4Standard Range 58.3kWh |
|---|---|---|
| Official range (WLTP) | 354 miles (better) | 270 miles |
| Estimated motorway rangeEVcarsguide estimate at sustained motorway speed. | 244 miles (better) | 226 miles |
| 10-80% rapid charge time | 37 min | 31 min (better) |
| Max rapid charge rate | 150 kW (better) | 127 kW |
| Home AC charging | 11 kW | 11 kW |
| Energy consumption | 166 Wh/km | Not available |
| Usable battery capacity | 82.5 kWh (better) | 58.3 kWh |
| Battery chemistry | LFP | NCMA |
| Battery architecture | 400V | 400V |
| Heat pump | Standard | Not available |
Driving & everyday use
Performance & drivetrain
Compare acceleration, power and drivetrain specifications for the selected trims.
What the critics say
See how UK motoring publications rate each car in their road tests.
BYD Seal
Design
Kia EV4
Standard Range 58.3kWh
Watch the reviews
Watch selected video reviews here, or visit each model page for the full collection.
BYD Seal
All 3 videos
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.
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.
Safety & ownership confidence
Euro NCAP - BYD Seal Design
Tested 2023
Adult Occupant89%
Child Occupant87%
Vulnerable Road Users82%
Safety Assist76%
Full result on euroncap.com (opens in new tab)
Euro NCAP - Kia EV4 Standard Range 58.3kWh
Tested 2025
Adult Occupant84%
Child Occupant85%
Vulnerable Road Users77%
Safety Assist78%
Warranty
Check the published battery warranty cover for each selected trim.
Buying options
Get a quote
BYD Seal
Used on AutoTraderLease deals
Kia EV4
Used on AutoTraderLease deals
Live used listings
Active inventory from independent UK dealers.
BYD Seal
- £28,5822025Car360View
- £30,6992025Car360View
- £29,6822025Car360View
Kia EV4
No active listings.
Frequently asked questions
Is the BYD Seal worth the extra £10,985 over the Kia EV4?
The BYD Seal costs £10,985 more than the Kia EV4. For that premium it adds 84 miles more WLTP range, 80 kW more power and a 1.6s quicker 0-62mph time. On EVcarsguide's combined category scores, the Kia EV4 comes out ahead overall.
Which is cheaper to own over 5 years, the BYD Seal or the Kia EV4?
The Kia EV4 is £10,985 cheaper to buy. The Kia EV4 is cheaper to charge, roughly £144 a year versus £184 for the BYD Seal, at 8,000 miles on an off-peak home tariff. Add 5 years of charging and the Kia EV4 comes out roughly £11,185 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 Seal and Kia EV4 like on a long motorway trip?
EVcarsguide estimates a real-world motorway range of about 244 miles for the BYD Seal and 226 miles for the Kia EV4 - both below their WLTP figures, because sustained high speed is the hardest case for an EV. The BYD Seal goes roughly 19 miles further between charging stops. Both rapid-charge to 80% in a similar time, around 31-37 minutes.
Which is easier to park and drive in town, the BYD Seal or the Kia EV4?
The two are within 15 mm on width, so neither is meaningfully easier to thread into a tight space. In a standard 2,400 mm bay that leaves about 540 mm of total clearance for the Kia EV4 and about 525 mm of total clearance for the BYD Seal.
Which battery will hold up better as a used buy, the BYD Seal or the Kia EV4?
Over a 8-year ownership window EVcarsguide's degradation model projects roughly 90% battery health for the BYD Seal and 89% for the Kia EV4. That is close enough that capacity loss should not decide between them. The BYD Seal's LFP-type pack tolerates daily 100% charging, while the Kia EV4'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 Seal comparisons
More Kia EV4 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 Seal and Kia EV4 rank among the best family EVsWhere the BYD Seal and Kia EV4 rank among the best motorway EVsWhere the BYD Seal and Kia EV4 rank among the best city EVsWhere the BYD Seal and Kia EV4 rank among the cheapest EVs to runWhere the BYD Seal and Kia EV4 rank among EVs with the biggest bootsWhere the BYD Seal and Kia EV4 rank among Best Used Electric Cars Under £10,000 (UK)
Further reading
Explore buying and ownership guides to help you choose between these electric cars.
GuideBuying a Used BYD Seal (2023 on): Design vs Excellence, the Long Warranty & What to Pay
A used BYD Seal buyer’s guide: Design RWD vs Excellence AWD, the 2026 update, BYD’s 6-year warranty and 8-year / 250,000 km battery cover, real-world range, what owners report, what to pay (nearly-new ones are about a third off) and a printable checklist.
GuideBuying a Used Kia EV4 (2025-on): Hatchback vs Fastback, Safety Pack & What to Pay
A used Kia EV4 buyer’s guide: 58.3 vs 81.4 kWh, hatchback vs Fastback, the DriveWise safety pack, real-world range, warranty left, recalls, what to pay and a printable checklist.
Data accuracy
Specs are sourced from manufacturer websites and manually reviewed. These figures were last verified .