Skip advert
Advertisement

Hyundai ix35 fuel cell prototype

We hit the road in pioneering hydrogen-fuelled crossover

Overall Auto Express rating

3.0

How we review cars
Find your Hyundai ix35
Compare deals from trusted partners on this car and previous models.
Or are you looking to sell your car?
Value my car
Fast, no-nonsense car selling
Value my car

With 136bhp, the fuel cell in this Hyundai is one of the most powerful in the business. Its near ambient pressure cell means the driveline is quiet and impressively refined. But the car itself needs a lot more work before it can match the best prototypes from rival manufacturers. Hydrogen fuel cell cars are getting ever closer to reality these days, so even development cars should drive better than this.

Advertisement - Article continues below

It's the most common element in the universe, but developing hydrogen into a viable fuel is proving to be a very lengthy and expensive task for the world’s car makers.

Hyundai has been working on fuel cells since as far back as 1998, with early test vehicles based on the Tucson and Santa Fe SUVs. But these have now been replaced by the latest ix35, launched last year. A fuel cell version is earmarked for production in 2015, so we test drove a prototype to see what buyers can expect.

The fuel cell uses a reaction that creates electric current when hydrogen and air are exposed to a platinum catalyst. This type of power source was first developed by General Electric in the fifties and was used by NASA to propel its Gemini space probes.

Skip advert
Advertisement
Skip advert
Advertisement - Article continues below

Used - available now

Mokka Electric

2022 Vauxhall

Mokka Electric

20,107 milesAutomaticElectric

Cash £12,300
View Mokka Electric
A-Class

2021 Mercedes

A-Class

35,660 milesManualPetrol1.3L

Cash £15,700
View A-Class
Crossland

2021 Vauxhall

Crossland

23,410 milesManualPetrol1.2L

Cash £11,300
View Crossland
Polo

2020 Volkswagen

Polo

48,992 milesManualPetrol1.0L

Cash £10,600
View Polo

In the ix35, two high-pressure hydrogen tanks are mounted in the boot, giving a range of 348 miles, while the electric motor produces 136bhp and 270Nm of torque – enough to provide 0-62mph in 14.1 seconds and a top speed of 100mph.

As with pure electric vehicles, the ix35 is lively from a standstill, but as the motor reaches its peak revs, efficiency falls off markedly and performance becomes very sluggish above 50mph.

Advertisement - Article continues below

What is impressive, though, is the refined, quiet operation of the hydrogen car. The fuel cell has a turbo to maintain pressure and to purge it of water when the temperature drops. On the road, all you hear is a low moan when accelerating hard. Hyundai claims it has successfully cold-started its fuel cell at minus 25 degrees Celsius, but it takes a couple of minutes to get it up to full power.

The prototype’s dynamics are less impressive, however. The regenerative brakes are grabby, so stopping always involves a series of lurches, no matter how sensitive you are with the pedal. The electronic steering is very light and completely lacking in feedback, while body control is poor, as the car rolls a lot over large bumps. This is a shame, as the first examples of Hyundai fuel cell vehicles have handled immaculately until now.

Of course, there are bigger questions about hydrogen fuel for cars that are still to be answered. The problems of where the fuel will come from, how to store it and how to extract it from renewable resources still need to be solved. But Hyundai seems well advanced with fuel cell design at least, if not the dynamics of its test car.

Skip advert
Advertisement

New & used car deals

Skoda Kodiaq

Skoda Kodiaq

RRP £38,140Avg. savings £3,019 off RRP*Used from £11,895
Audi A3

Audi A3

RRP £26,295Avg. savings £2,499 off RRP*Used from £10,695
Vauxhall Corsa

Vauxhall Corsa

RRP £19,200Avg. savings £4,685 off RRP*Used from £14,998
Nissan Qashqai

Nissan Qashqai

RRP £27,415Avg. savings £5,924 off RRP*Used from £12,295
* Average savings are calculated daily based on the best dealer prices on Auto Express vs manufacturer RRP
Skip advert
Advertisement

Most Popular

Car Deal of the Day: 717bhp BMW M5 Touring super-estate on a tasty lease deal
BMW M5 Touring - front action

Car Deal of the Day: 717bhp BMW M5 Touring super-estate on a tasty lease deal

The BMW M5 Touring is M car royalty, with a thoroughly impressive PHEV powertrain. It’s our Deal of the Day for 29 June
News
29 Jun 2025
Electric car appeal is at its lowest since 2019
Opinion - Kia EV9 GT

Electric car appeal is at its lowest since 2019

From poor electric car sales to crashes in F1, Mike Rutherford thinks its been a crazy few weeks in the automotive world
Opinion
29 Jun 2025
New Skoda Epiq vRS to headline brand’s hot-SUV onslaught
Skoda Epiq vRS exclusive image

New Skoda Epiq vRS to headline brand’s hot-SUV onslaught

Every future Skoda will get the go-faster treatment, with the brand also working on making cars sharper and more engaging
News
27 Jun 2025