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BMW iX3 vs Polestar 4 Coupé
Selected trim40Change trim395 mi · 82.6 kWh · £53,250
Selected trimRear motorChange trim385 mi · 100 kWh · £56,750
At a glance
In this comparison, BMW iX3 leads on motorway range, family practicality and running costs, while the Polestar 4 Coupé stays competitive across the board.
Which should you choose?
Choose the BMW iX3 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 want the lowest running costs - from just 2p 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 BMW iX3 leads in the most categories, but each car here has its strengths.
Value
BMW
6.2
Polestar
6.2
Too close to call
Motorway RangeBMW
BMW
7.8
Polestar
6.3
FamilyBMW
BMW
8
Polestar
6.4
Charging
BMW
8.3
Polestar
8.2
Too close to call
Cost Per MileBMW
BMW
6.4
Polestar
3.8
City DrivingBMW
BMW
3.3
Polestar
1.8
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.
| Measure | BMW iX340 | Polestar 4 CoupéRear motor |
|---|---|---|
| Price | £53,250 (better) | £56,750 |
| Official range | 395 miles (better) | 385 miles |
| Boot space | 520 L | 526 L (better) |
| 10-80% rapid charge | 21 min | Not available |
| 0-62 mph | 6 sec | Not available |
Size Comparison
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BMW iX3
Polestar 4 Coupé
Length
BMW iX34,782mm-58mm
Polestar 4 Coupé4,840mm
Width
BMW iX31,895mm-113mm
Polestar 4 Coupé2,008mm
Height
BMW iX31,635mm
Polestar 4 Coupé1,534mm-101mm
Space, size & parking
Parking & manoeuvring
Compare exterior dimensions to assess how each car fits UK parking spaces.
| Measure | BMW iX340 | Polestar 4 CoupéRear motor |
|---|---|---|
| Length | 4,782 mm | 4,840 mm |
| Width (mirrors folded) | 1,895 mm (better) | 2,008 mm |
| Width with mirrors out | 2,093 mm (better) | 2,139 mm |
| Height | 1,635 mm | 1,534 mm |
| Turning circle | 12.1 m | 11.6 m (better) |
| Clearance in a standard bayA standard UK parking bay is 2,400 mm wide. | 505 mm spare (better) | 392 mm spare |
People & luggage
Compare seating, child-seat mounting points, boot space and towing capacity.
| Measure | BMW iX340 | Polestar 4 CoupéRear motor |
|---|---|---|
| Seats | Not available | 5 |
| Boot space (seats up) | 520 L | 526 L (better) |
| Boot space (seats down) | 1750 L | Not available |
| Frunk | 58 L | Not available |
How each stacks up
Percentile ranks against UK EVs of the same body style.
BMW iX3
- 395 mile WLTP range, longer than 95% of SUVs we track.
- Peak DC charging of 300 kW, faster than 90% of SUVs in our catalogue.
- Uses 146 Wh/km on the WLTP cycle, more efficient than 95% of SUVs we track.
Polestar 4 Coupé
Not enough peers to make confident percentile claims.
Full specifications
| Specification |  BMW iX3 40 |  Polestar 4 Coupé Rear motor |
|---|---|---|
| Dimensions | ||
| Length | 4.78m | 4.84m+58mm |
| Width | 1.90m | 2.01m+113mm |
| Width (mirrors) | 2.09m | 2.14m+46mm |
| Height | 1.64m | 1.53m-101mm |
| Wheelbase | 2.90m | 3.00m+103mm |
| Ground Clearance | Not available | 166mm |
| Capacity | ||
| Boot (seats up) | 520L | 526L (better) |
| Boot (seats down) | 1750L | Not available |
| Frunk | 58L | Not available |
| Seats | Not available | 5 |
| Practicality | ||
| Turning Circle | 12.1m | 11.64m (better) |
| Kerb Weight | 2,200kg (better) | 2,230kg |
| Electric | ||
| Battery | 82.6kWh | 100kWh (better) |
| Range (WLTP) | 395 mi (better) | 385 mi |
| Max DC Charge | 300kW (better) | 200kW |
| Pricing | ||
| UK MSRP | £53,250 (better) | £56,750 |
| Details | ||
| Body Style | SUV | Coupe SUV |
| Available | 2026+ | 2026+ |
Range & charging
Range, charging & battery
Check official and estimated driving range alongside charging speeds, efficiency and battery technology.
| Measure | BMW iX340 | Polestar 4 CoupéRear motor |
|---|---|---|
| Official range (WLTP) | 395 miles (better) | 385 miles |
| Estimated motorway rangeEVcarsguide estimate at sustained motorway speed. | 293 miles | 321 miles (better) |
| 10-80% rapid charge time | 21 min | Not available |
| Max rapid charge rate | 300 kW (better) | 200 kW |
| Home AC charging | 11 kW | 11 kW |
| Energy consumption | 146 Wh/km | Not available |
| Usable battery capacity | 82.6 kWh | 100 kWh (better) |
| Battery architecture | 800V | Not available |
Driving & everyday use
Performance & drivetrain
Compare acceleration, power and drivetrain specifications for the selected trims.
| Measure | BMW iX340 | Polestar 4 CoupéRear motor |
|---|---|---|
| 0-62 mph | 6 sec | Not available |
| Power | 235 kW (better) | 200 kW |
| Torque | 500 Nm | Not available |
| 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.
BMW iX3
40
Polestar 4 Coupé
Rear motor
No critic reviews gathered yet for this car.
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 - BMW iX3 40
Tested 2026
Full result on euroncap.com (opens in new tab)
Euro NCAP - Polestar 4 Coupé Rear motor
Tested 2025
Adult Occupant92%
Child Occupant85%
Vulnerable Road Users81%
Safety Assist79%
Full result on euroncap.com (opens in new tab)
Warranty
Check the published battery warranty cover for each selected trim.
| Measure | BMW iX340 | Polestar 4 CoupéRear motor |
|---|---|---|
| Battery warranty | Not available | 8 years |
| Battery warranty distance | Not available | 160,934 km |
Buying options
Get a quote
BMW iX3
Used on AutoTraderLease deals
Polestar 4 Coupé
Used on AutoTraderLease deals
Frequently asked questions
Is the Polestar 4 Coupé worth the extra £3,500 over the BMW iX3?
The Polestar 4 Coupé costs £3,500 more than the BMW iX3. On the headline specs that premium buys little measurable advantage - the two are closely matched on range, charging and space. The BMW iX3 is not just cheaper - it also offers 100 kW faster peak rapid charging and 35 kW more power. On EVcarsguide's combined category scores, the BMW iX3 comes out ahead overall.
Which is cheaper to own over 5 years, the BMW iX3 or the Polestar 4 Coupé?
The BMW iX3 is £3,500 cheaper to buy. Running costs are almost identical - about £160 a year either way, at 8,000 miles on an off-peak home tariff. Add 5 years of charging and the BMW iX3 comes out roughly £3,580 cheaper overall. These figures cover list price and home charging only - insurance, servicing, tyres and depreciation will move the real total.
What are the BMW iX3 and Polestar 4 Coupé like on a long motorway trip?
EVcarsguide estimates a real-world motorway range of about 293 miles for the BMW iX3 and 321 miles for the Polestar 4 Coupé - both below their WLTP figures, because sustained high speed is the hardest case for an EV. The Polestar 4 Coupé goes roughly 29 miles further between charging stops.
Which is easier to park and drive in town, the BMW iX3 or the Polestar 4 Coupé?
The BMW iX3 is the easier car for tight UK car parks: it is 113 mm narrower than the Polestar 4 Coupé. In a standard 2,400 mm bay that leaves about 505 mm of total clearance for the BMW iX3 and about 392 mm of total clearance for the Polestar 4 Coupé. The Polestar 4 Coupé also turns in a 0.5 m tighter circle, which helps with U-turns and multi-storey ramps.
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.
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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 BMW iX3 and Polestar 4 Coupé rank among long-range EVsWhere the BMW iX3 and Polestar 4 Coupé rank among the best motorway EVsWhere the BMW iX3 and Polestar 4 Coupé rank among the best city EVsWhere the BMW iX3 and Polestar 4 Coupé rank among the cheapest EVs to runWhere the BMW iX3 and Polestar 4 Coupé rank among EVs with the biggest bootsWhere the BMW iX3 and Polestar 4 Coupé rank among Best Used Electric Cars Under £10,000 (UK)
If neither is quite right
Explore other verified electric cars that may better suit the priorities this pair does not meet.
Data accuracy
Specs are sourced from manufacturer websites and manually reviewed. These figures were last verified .