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Hyundai IONIQ 9 vs Mercedes-Benz GLC
Selected trimLong-Range RWDChange trim385 mi · 110.3 kWh · £64,995
Selected trim400 4MATIC405 mi · 94 kWh · £61,100
At a glance
In this comparison, Hyundai IONIQ 9 leads on family practicality, while the Mercedes-Benz GLC leads on value for money, charging speed and running costs.
Which should you choose?
Choose the Hyundai IONIQ 9 if...
- you have a family - it has the best combination of boot space, safety, and rear legroom
Choose the Mercedes-Benz GLC if...
- you want the most for your money - best overall spec per pound
- you need the fastest charging of these options
- you want the lowest running costs - from just 2.2p per mile on off-peak electricity
How we reached the recommendation
Verdict
Our take
The Mercedes-Benz GLC leads in the most categories, but each car here has its strengths.
ValueMercedes-Benz
Hyundai
5.5
Mercedes-Benz
6
Motorway Range
Hyundai
7.1
Mercedes-Benz
6.9
Too close to call
FamilyHyundai
Hyundai
9.5
Mercedes-Benz
7.9
ChargingMercedes-Benz
Hyundai
7.1
Mercedes-Benz
8.2
Cost Per MileMercedes-Benz
Hyundai
2.1
Mercedes-Benz
3.5
What each car does better
See the specification differences behind the verdict, with supporting figures for each advantage.
Mercedes-Benz GLC
400 4MATIC
- £3,895 cheaper
- 182 litres more boot space
- 97 kW faster rapid charging
- 200 kW more power
- 2.5s quicker 0-62 mph
- 0.4 m tighter turning circle
- 900 kg more towing capacity
Key specifications
Compare the key specifications for your selected trims.
| Measure | Hyundai IONIQ 9Long-Range RWD | Mercedes-Benz GLC400 4MATIC |
|---|---|---|
| Price | £64,995 | £61,100 (better) |
| Official range | 385 miles | 405 miles (better) |
| Boot space | 338 L | 520 L (better) |
| 10-80% rapid charge | 24 min | 22 min (better) |
| 0-62 mph | 9.4 sec | 6.9 sec (better) |
Size Comparison
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Hyundai IONIQ 9
Mercedes-Benz GLC
Length
Hyundai IONIQ 95,060mm
Mercedes-Benz GLC4,845mm-215mm
Width
Hyundai IONIQ 91,980mm
Mercedes-Benz GLC1,913mm-67mm
Height
Hyundai IONIQ 91,790mm
Mercedes-Benz GLC1,644mm-146mm
Space, size & parking
Parking & manoeuvring
Compare exterior dimensions to assess how each car fits UK parking spaces.
| Measure | Hyundai IONIQ 9Long-Range RWD | Mercedes-Benz GLC400 4MATIC |
|---|---|---|
| Length | 5,060 mm | 4,845 mm |
| Width (mirrors folded) | 1,980 mm | 1,913 mm (better) |
| Width with mirrors out | 2,239 mm | 2,089 mm (better) |
| Height | 1,790 mm | 1,644 mm |
| Turning circle | 12.5 m | 12.1 m (better) |
| Clearance in a standard bayA standard UK parking bay is 2,400 mm wide. | 420 mm spare | 487 mm spare (better) |
People & luggage
Compare seating, child-seat mounting points, boot space and towing capacity.
| Measure | Hyundai IONIQ 9Long-Range RWD | Mercedes-Benz GLC400 4MATIC |
|---|---|---|
| Seats | 7 (better) | 5 |
| Boot space (seats up) | 338 L | 520 L (better) |
| Boot space (seats down) | 1990 L | Not available |
| Frunk | 88 L | Not available |
| Towing capacity (braked) | 1,500 kg | 2,400 kg (better) |
How each stacks up
Percentile ranks against UK EVs of the same body style.
Hyundai IONIQ 9
- At 5,060 mm, longer than 95% of SUVs we track.
- A 88 L frunk, one of 12 of 232 UK EVs in our catalogue with a front boot of 88 L or more.
- 385 mile WLTP range, longer than 90% of SUVs we track.
Mercedes-Benz GLC
- 405 mile WLTP range, longer than 100% of SUVs we track.
- Peak DC charging of 330 kW, faster than 90% of SUVs in our catalogue.
- At 4,845 mm, longer than 85% of SUVs we track.
Full specifications
| Specification |  Hyundai IONIQ 9 Long-Range RWD |  Mercedes-Benz GLC 400 4MATIC |
|---|---|---|
| Dimensions | ||
| Length | 5.06m | 4.84m-215mm |
| Width | 1.98m | 1.91m-67mm |
| Width (mirrors) | 2.24m | 2.09m-150mm |
| Height | 1.79m | 1.64m-146mm |
| Wheelbase | 3.13m | 2.97m-158mm |
| Capacity | ||
| Boot (seats up) | 338L | 520L (better) |
| Boot (seats down) | 1990L | Not available |
| Frunk | 88L | Not available |
| Seats | 7 (better) | 5 |
| Practicality | ||
| Turning Circle | 12.5m | 12.1m (better) |
| Kerb Weight | 2,541kg (better) | 2,581kg |
| Towing Capacity | 1,500kg | 2,400kg (better) |
| Electric | ||
| Battery | 110.3kWh (better) | 94kWh |
| Range (WLTP) | 385 mi | 405 mi (better) |
| Max DC Charge | 233kW | 330kW (better) |
| Pricing | ||
| UK MSRP | £64,995 | £61,100 (better) |
| Details | ||
| Body Style | SUV | SUV |
| Available | 2025+ | 2026+ |
Range & charging
Range, charging & battery
Check official and estimated driving range alongside charging speeds, efficiency and battery technology.
| Measure | Hyundai IONIQ 9Long-Range RWD | Mercedes-Benz GLC400 4MATIC |
|---|---|---|
| Official range (WLTP) | 385 miles | 405 miles (better) |
| Estimated motorway rangeEVcarsguide estimate at sustained motorway speed. | 321 miles (better) | 297 miles |
| 10-80% rapid charge time | 24 min | 22 min (better) |
| Max rapid charge rate | 233 kW | 330 kW (better) |
| Home AC charging | 10.5 kW | 11 kW (better) |
| Energy consumption | Not available | 164 Wh/km |
| Usable battery capacity | 110.3 kWh (better) | 94 kWh |
| Battery chemistry | NCMA | NMC |
| Battery architecture | 800V | 800V |
| Heat pump | Standard | Not available |
Driving & everyday use
Performance & drivetrain
Compare acceleration, power and drivetrain specifications for the selected trims.
| Measure | Hyundai IONIQ 9Long-Range RWD | Mercedes-Benz GLC400 4MATIC |
|---|---|---|
| 0-62 mph | 9.4 sec | 6.9 sec (better) |
| Power | 160 kW | 360 kW (better) |
| Torque | 350 Nm | 800 Nm (better) |
| Drivetrain | RWD | AWD |
What the critics say
See how UK motoring publications rate each car in their road tests.
Hyundai IONIQ 9
Long-Range RWD
Mercedes-Benz GLC
400 4MATIC
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 - Hyundai IONIQ 9 Long-Range RWD
Tested 2025
Adult Occupant84%
Child Occupant87%
Vulnerable Road Users77%
Safety Assist83%
Full result on euroncap.com (opens in new tab)
Euro NCAP - Mercedes-Benz GLC 400 4MATIC
Tested 2025
Adult Occupant92%
Child Occupant90%
Vulnerable Road Users74%
Safety Assist84%
Full result on euroncap.com (opens in new tab)
Buying options
Get a quote
Hyundai IONIQ 9
Used on AutoTraderLease deals
Mercedes-Benz GLC
Used on AutoTraderLease deals
Live used listings
Active inventory from independent UK dealers.
Hyundai IONIQ 9
- £54,9992026Car360View
Mercedes-Benz GLC
No active listings.
Frequently asked questions
Is the Hyundai IONIQ 9 worth the extra £3,895 over the Mercedes-Benz GLC?
The Hyundai IONIQ 9 costs £3,895 more than the Mercedes-Benz GLC. For that premium it adds 2 more seats (7 versus 5). The Mercedes-Benz GLC is not just cheaper - it also offers 97 kW faster peak rapid charging, 182 litres more boot space and 200 kW more power. On EVcarsguide's combined category scores, the Mercedes-Benz GLC comes out ahead overall.
Which is cheaper to own over 5 years, the Hyundai IONIQ 9 or the Mercedes-Benz GLC?
The Mercedes-Benz GLC is £3,895 cheaper to buy. Running costs are almost identical - about £176 a year either way, at 8,000 miles on an off-peak home tariff. Add 5 years of charging and the Mercedes-Benz GLC comes out roughly £3,975 cheaper overall. These figures cover list price and home charging only - insurance, servicing, tyres and depreciation will move the real total.
What are the Hyundai IONIQ 9 and Mercedes-Benz GLC like on a long motorway trip?
EVcarsguide estimates a real-world motorway range of about 321 miles for the Hyundai IONIQ 9 and 297 miles for the Mercedes-Benz GLC - both below their WLTP figures, because sustained high speed is the hardest case for an EV. The Hyundai IONIQ 9 goes roughly 24 miles further between charging stops. Both rapid-charge to 80% in a similar time, around 22-24 minutes.
Which is easier to park and drive in town, the Hyundai IONIQ 9 or the Mercedes-Benz GLC?
The Mercedes-Benz GLC is the easier car for tight UK car parks: it is 67 mm narrower than the Hyundai IONIQ 9. In a standard 2,400 mm bay that leaves about 487 mm of total clearance for the Mercedes-Benz GLC and about 420 mm of total clearance for the Hyundai IONIQ 9. The Mercedes-Benz GLC also turns in a 0.4 m tighter circle, which helps with U-turns and multi-storey ramps.
Which battery will hold up better as a used buy, the Hyundai IONIQ 9 or the Mercedes-Benz GLC?
Over a 8-year ownership window EVcarsguide's degradation model projects roughly 89% battery health for the Hyundai IONIQ 9 and 84% for the Mercedes-Benz GLC. That gives the Hyundai IONIQ 9 a modest edge in retained real-world range. Both use NMC-type cells, so for daily use keep the charge limit near 80% to slow degradation.
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 Hyundai IONIQ 9 comparisons
More Mercedes-Benz GLC 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 Hyundai IONIQ 9 and Mercedes-Benz GLC rank among the best family EVsWhere the Hyundai IONIQ 9 and Mercedes-Benz GLC rank among the best electric SUVsWhere the Hyundai IONIQ 9 and Mercedes-Benz GLC rank among long-range EVsWhere the Hyundai IONIQ 9 and Mercedes-Benz GLC rank among the best motorway EVsWhere the Hyundai IONIQ 9 and Mercedes-Benz GLC rank among the best city EVsWhere the Hyundai IONIQ 9 and Mercedes-Benz GLC rank among the cheapest EVs to run
If neither is quite right
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Data accuracy
Specs are sourced from manufacturer websites and manually reviewed. These figures were last verified .