In this comparison, BMW iX3 leads on value for money, motorway range and family practicality, while the Lexus RZ leads on running costs.
Choose the BMW iX3 if...
Choose the Lexus RZ if...
Our take
The BMW iX3 leads in the most categories, but each car here has its strengths.
Too close to call
See the specification differences behind the verdict, with supporting figures for each advantage.
Compare the key specifications for your selected trims.
Size Comparison
Length
Width
Height
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Compare seating, child-seat mounting points, boot space and towing capacity.
Percentile ranks against UK EVs of the same body style.
BMW iX3
Lexus RZ
Not enough peers to make confident percentile claims.
| Specification | BMW iX3 40 | Lexus RZ 350e Premium FWD |
|---|---|---|
| Dimensions | ||
| Length | 4.78m | 4.80m+23mm |
| Width | 1.90m | 1.90m |
| Width (mirrors) | 2.09m | Not available |
| Height | 1.64m | 1.64m |
| Wheelbase | 2.90m | 2.85m-46mm |
| Ground Clearance | Not available | 200mm |
| Capacity | ||
| Boot (seats up) | 520L | 522L* (better) |
| Boot (seats down) | 1750L (better) | 1451L |
| Frunk | 58L | Not available |
| Seats | Not available | 5 |
| Practicality | ||
| Turning Circle | 12.1m | 11.2m (better) |
| Kerb Weight | 2,200kg | 1,995kg (better) |
| Towing Capacity | Not available | 750kg |
| Electric | ||
| Battery | 82.6kWh (better) | 77kWh |
| Range (WLTP) | 395 mi (better) | 353 mi |
| Max DC Charge | 300kW (better) | 150kW |
| Pricing | ||
| UK MSRP | £53,250 (better) | £53,995 |
| Details | ||
| Body Style | SUV | SUV |
| Available | 2026+ | 2026+ |
* Lexus RZ: Boot volume is measured to VDA and includes the underfloor storage area.
* Lexus RZ: WLTP figure is provisional prior to final homologation; quoted on 18-inch wheels (20-inch wheels reduce it).
Check official and estimated driving range alongside charging speeds, efficiency and battery technology.
| Measure | BMW iX340 | Lexus RZ350e Premium FWD |
|---|---|---|
| Official range (WLTP) | 395 miles (better) | 353 miles |
| Estimated motorway rangeEVcarsguide estimate at sustained motorway speed. | 293 miles | 294 miles (better) |
| 10-80% rapid charge time | 21 min (better) | 30 min |
| Max rapid charge rate | 300 kW (better) | 150 kW |
| Home AC charging | 11 kW | 22 kW (better) |
| Energy consumption | 146 Wh/km | Not available |
| Usable battery capacity | 82.6 kWh (better) | 77 kWh |
| Battery architecture | 800V | Not available |
Compare acceleration, power and drivetrain specifications for the selected trims.
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

Lexus RZ
350e Premium FWD
No critic reviews gathered yet for this car.
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.
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Cost per mile
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Tested 2026
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BMW iX3
Lexus RZ
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BMW iX3
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Lexus RZ
The BMW iX3 is £745 cheaper to buy. Running costs are almost identical - about £152 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 £705 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 293 miles for the BMW iX3 and 294 miles for the Lexus RZ - 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 21 minutes in the BMW iX3 and 30 in the Lexus RZ, so the BMW iX3 loses less time at each stop.
The two are within 0 mm on width, so neither is meaningfully easier to thread into a tight space. In a standard 2,400 mm bay that leaves about 505 mm of total clearance for the BMW iX3 and about 505 mm of total clearance for the Lexus RZ. The Lexus RZ also turns in a 0.9 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.
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EVcarsguide scores every verified EV on price, range, family use and running costs. Here is where this pair appears.
Explore other verified electric cars that may better suit the priorities this pair does not meet.
Specs are sourced from manufacturer websites and manually reviewed. These figures were last verified .