In this comparison, BYD Dolphin leads on motorway range and charging speed, while the Hyundai Ioniq 3 leads on value for money and running costs.
Choose the BYD Dolphin if...
Choose the Hyundai Ioniq 3 if...
Our take
The Hyundai Ioniq 3 edges ahead overall, but it's close - check which categories matter most to you.
Too close to call
Too close to call
See the specification differences behind the verdict, with supporting figures for each advantage.
Comfort
Compare the key specifications for your selected trims.
| Measure | BYD DolphinComfort | Hyundai Ioniq 3Advance 42kWh |
|---|---|---|
| Price | £30,195 | £22,245 (better) |
| Official range | 265 miles (better) | 213 miles |
| Boot space | 364 L | 441 L (better) |
| 10-80% rapid charge | Not available | 29 min |
| 0-62 mph | 7 sec (better) | 8.8 sec |
Size Comparison
Length
Width
Height
Compare exterior dimensions to assess how each car fits UK parking spaces.
| Measure | BYD DolphinComfort | Hyundai Ioniq 3Advance 42kWh |
|---|---|---|
| Length | 4,290 mm | 4,155 mm |
| Width (mirrors folded) | 1,770 mm (better) | 1,800 mm |
| Width with mirrors out | 2,012 mm (better) | 2,100 mm |
| Height | 1,570 mm | 1,505 mm |
| Turning circle | 9.4 m (better) | 10.4 m |
| Clearance in a standard bayA standard UK parking bay is 2,400 mm wide. | 630 mm spare (better) | 600 mm spare |
Compare seating, child-seat mounting points, boot space and towing capacity.
| Measure | BYD DolphinComfort | Hyundai Ioniq 3Advance 42kWh |
|---|---|---|
| Seats | 5 | 5 |
| ISOFIX child-seat points | 3 | Not available |
| Boot space (seats up) | 364 L | 441 L (better) |
| Boot space (seats down) | 1329 L (better) | 1213 L |
| Towing capacity (braked) | 750 kg | 750 kg |
Percentile ranks against UK EVs of the same body style.
BYD Dolphin
Hyundai Ioniq 3
| Specification | BYD Dolphin Comfort | Hyundai Ioniq 3 Advance 42kWh |
|---|---|---|
| Dimensions | ||
| Length | 4.29m | 4.16m-135mm |
| Width | 1.77m | 1.80m+30mm |
| Width (mirrors) | 2.01m | 2.10m+88mm |
| Height | 1.57m | 1.50m-65mm |
| Wheelbase | 2.70m | 2.68m-20mm |
| Capacity | ||
| Boot (seats up) | 364L | 441L (better) |
| Boot (seats down) | 1329L (better) | 1213L |
| Seats | 5 | 5 |
| Practicality | ||
| Turning Circle | 9.4m (better) | 10.4m |
| Kerb Weight | 1,658kg | 1,550kg (better) |
| Towing Capacity | 750kg | 750kg |
| Electric | ||
| Battery | 60.4kWh (better) | 42.2kWh |
| Range (WLTP) | 265 mi (better) | 213 mi |
| Max DC Charge | 110kW | 119kW (better) |
| Pricing | ||
| UK MSRP | £30,195 | £22,245 (better) |
| Price after EV grant | £30,195 (not eligible) | £18,495 (-£3,750) |
| Details | ||
| Body Style | Hatchback | Hatchback |
| Available | 2023+ | 2026+ |
Check official and estimated driving range alongside charging speeds, efficiency and battery technology.
| Measure | BYD DolphinComfort | Hyundai Ioniq 3Advance 42kWh |
|---|---|---|
| Official range (WLTP) | 265 miles (better) | 213 miles |
| Estimated motorway rangeEVcarsguide estimate at sustained motorway speed. | 221 miles (better) | 178 miles |
| 10-80% rapid charge time | Not available | 29 min |
| Max rapid charge rate | 110 kW | 119 kW (better) |
| Home AC charging | 11 kW | 11 kW |
| Usable battery capacity | 60.4 kWh (better) | 42.2 kWh |
| Battery chemistry | LFP | Not available |
| Battery architecture | 400V | 400V |
| Heat pump | Standard | Not available |
Compare acceleration, power and drivetrain specifications for the selected trims.
| Measure | BYD DolphinComfort | Hyundai Ioniq 3Advance 42kWh |
|---|---|---|
| 0-62 mph | 7 sec (better) | 8.8 sec |
| Power | 150 kW (better) | 108 kW |
| Torque | 310 Nm (better) | 250 Nm |
| Drivetrain | FWD | FWD |
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 Dolphin
Comfort
7.2/10
average across 6 reviews

Hyundai Ioniq 3
Advance 42kWh
No critic reviews gathered yet for this car.
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.
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.
Tested 2023
Check the published battery warranty cover for each selected trim.
| Measure | BYD DolphinComfort | Hyundai Ioniq 3Advance 42kWh |
|---|---|---|
| Battery warranty | 8 years | Not available |
| Battery warranty distance | 250,000 km | Not available |
Get a quote
BYD Dolphin
Hyundai Ioniq 3
The BYD Dolphin costs £7,950 more than the Hyundai Ioniq 3. For that premium it adds 52 miles more WLTP range, 42 kW more power and a 1.8s quicker 0-62mph time. The Hyundai Ioniq 3 is not just cheaper - it also offers 77 litres more boot space. On EVcarsguide's combined category scores, the Hyundai Ioniq 3 comes out ahead overall.
The Hyundai Ioniq 3 is £7,950 cheaper to buy. Running costs are almost identical - about £136 a year either way, at 8,000 miles on an off-peak home tariff. Add 5 years of charging and the Hyundai Ioniq 3 comes out roughly £8,030 cheaper overall. These figures cover list price and home charging only - insurance, servicing, tyres and depreciation will move the real total.
EVcarsguide estimates a real-world motorway range of about 221 miles for the BYD Dolphin and 178 miles for the Hyundai Ioniq 3 - both below their WLTP figures, because sustained high speed is the hardest case for an EV. The BYD Dolphin goes roughly 43 miles further between charging stops.
The BYD Dolphin is the easier car for tight UK car parks: it is 30 mm narrower than the Hyundai Ioniq 3. In a standard 2,400 mm bay that leaves about 630 mm of total clearance for the BYD Dolphin and about 600 mm of total clearance for the Hyundai Ioniq 3. The BYD Dolphin also turns in a 1.0 m tighter circle, which helps with U-turns and multi-storey ramps.
Visit the full model pages for owner feedback, expert reviews, used prices and battery-health information.
Compare similarly sized and priced electric cars before finalising your shortlist.
More BYD Dolphin comparisons
More Hyundai Ioniq 3 comparisons
EVcarsguide scores every verified EV on price, range, family use and running costs. Here is where this pair appears.
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Specs are sourced from manufacturer websites and manually reviewed. These figures were last verified .