Kia Stonic vs Fiat 500X

What's the difference?

All in all, the Stonic is a satisfactory daily driver, it’s just nowhere near ideal as a modern urban conveyance.

Sure, it’s reasonably priced in an increasingly expensive market, but it is very sluggish off the mark which is a solid negative against its overall rating. It also feels cheap inside and lacks contemporary driver-assist tech, such as adaptive cruise control.

The 500X is a fun-looking alternative to the various options available from everyone else and is - overall - better to drive than its Renegade twin. 

It packs a very good safety package which you can't ignore but does lose points on the warranty and servicing regime. But it's also built to take four adults in comfort, which not every car in the segment can boast.

I spend the lion’s share of my time in large and upper large 4WDs, so spending quality time in something like this little hot hatchbac… er, small SUV, is a revelation and a lot of zippy fun. Like driving a go-kart without the fumes and the prangs.

The 2025 Kia Stonic Sport is 4140mm long (with a 2580mm wheelbase), 1760mm wide and 1520mm high. It has a listed kerb weight of 1227kg.

This is a slick-looking hatchbac… er, light SUV, and it looks suitably sporty. 

Though ground clearance is unlisted, it stands well clear of the road surface, giving this hatchbac… er, compact SUV, more presence than it otherwise might have.

Look, I like the 500X, but I know why people don't. It's clearly a 500X in the way a Mini Countryman is a Mini. It looks like a 500, but get closer and you see the difference. It's chubby like a $10 weekend market Bhudda statue and has great big googly eyes like Mr Magoo. I find this endearing, my wife does not. The looks aren't the only thing she doesn't like.

The cabin is a bit more restrained and I quite like the band of colour stretching across the dash. The 500X is meant to be a bit more grown up than the 500, so there's a proper dash, more sensible design choices but it still has the big buttons, perfect for the meaty fingers of people who won't be buying this car.

The Stonic Sport’s interior is a practical space but it feels a bit dated and underdone in a car market increasingly packed with well-equipped, cheaper and more contemporary SUVs.

The most obvious factors working against the Sport are its the 8.0-inch touchscreen multimedia (too small), the absence of wireless Apple CarPlay and Android Auto and wireless phone charging and multiple hard plastic surfaces.

Sure, the touchscreen is easy enough to operate, but it sometimes takes a few finger stabs to hit the sweet spot you’re after, and thankfully there are dials and buttons off-screen as alternatives for air con controls, etc.

There’s a satisfactory number of storage spaces in the front including two cupholders between the seats, a few little receptacles for your everyday carry gear, and bottle holders in each of the front doors.

The back seat is short on cupholders – there are none – but there are bottle holders in the doors, and the passengers back there get a USB-A port, a map pocket (in the back of the front passenger’s seat) and flip-down grab handles. There are no directional air vents.

Back-seat room is satisfactory for an adult without being spacious, but fine for kids. What do you expect in a small SUV?

In terms of packability, the cargo area (with the rear seat up and in use) yields a listed 352 litres of space. The rear seats are in a 60/40 split fold configuration and with them folded down there is a listed 1155 litres of useable room.

The rear cargo area has bag hooks, a storage space in the left-hand inner wall, and tie-down points at each corner of the floor.

A steel space-saver spare wheel is under the cargo area floor.

At just 4.25 metres, the 500X isn't big, but makes the most of what it's got. The boot impresses at 350 litres and with the seats down, I think you could reasonably expect to triple that figure, though Fiat doesn't have an official number that I can find. For added Italian feel, you can tip the passenger seat forward to get really long things in, like a Billy bookshelf flat pack from Ikea.

Rear seat passengers sit high and upright meaning leg and kneeroom are maximised and with that tall roof, you won't scrape your head. 

The doors each have a small bottle holder for a total of four and Fiat has got serious about cupholders - the 500X now has four.

I drove the Pop Star, which is the second of the now-two model "regular" range, the other being the, er, Pop. I drove a Special Edition in 2018 and it's not clear if it is Special as there's also an Amalfi Special edition. Anyway.

The $30,990 (plus on-road costs) Pop Star has 17-inch alloys, six-speaker Beats-branded stereo, dual-zone climate control, reversing camera, keyless entry and start, active cruise control, sat nav, auto headlights and wipers, leather shifter and steering wheel and a space-saver spare.

The Beats-branded stereo speakers are supplied with noise from FCA's UConnect on a 7.0-inch touchscreen. The same system is in a Maserati, don't you know. Offering Apple CarPlay and Android Auto, UConnect loses points by shrinking the Apple interface into a lurid red frame. Android Auto properly fills the screen, for some reason which is ironic given Apple owns the Beats brand.

The 2025 Kia Sonic Sport has a 1.0-litre three-cylinder turbo-petrol engine – producing 74kW at 4500-6000rpm and 172Nm at 1500-4000rpm – and that’s paired with a seven-speed dual-clutch automatic transmission. 

This pairing is a mostly punchy one, although definite lagginess is evident from a standing start often enough that it’s a disconcerting characteristic rather than a mildly annoying one.

This turbocharged engine used to only be offered in the top-spec GT-Line, so it’s a welcome addition to the other grades.

Fiat's rather excellent 1.4-litre turbo MultiAir does duty under the stubby bonnet, making 103kW and 230Nm. Rather less excellent is the six-speed dual-clutch automatic transmission, which sends power through the front wheels only.

It's rated to tow a 1200kg braked trailer and 600kg unbraked.

Kia's official fuel consumption figure for the Stonic Sport is 5.4L/100km, on a combined (urban/extra-urban) cycle. And on this test I recorded 8.2L/100km.

The Stonic Sport has an 45-litre fuel tank so, going by my on-test fuel figure, you could reasonably expect a driving range of about 548km from a full tank. 

Fuel requirement is 91 RON 'standard' unleaded.

Fiat rather optimistically suggest you'll get a combined cycle figure of 5.7L/100km but try as I might, I couldn't do better than 11.2L/100km. What's worse, it demands 98RON fuel, so it's not the cheapest car to run. This figure us consistent with past weeks in the 500X and no, I wasn't thrashing it.

The Stonic Sport is a handy urban conveyance, but it is far from perfect.

It’s a small, light vehicle so it’s nimble for navigating through car-packed streets and convenient for tricky parking manoeuvres.

Steering is well weighted and precise.

And the turbocharged petrol engine is a welcome addition to the Stonic package, introducing a handy amount of power and torque which is sensibly harnessed and delivered – most of the time anyway – via the mostly clever transmission.

However, in stop-start, inner-city traffic or even a busy suburban area, the Stonic Sport struggles to get off the mark from a standstill, so much so that this one characteristic threatens to spoil the rest of the driving experience. 

Once the Sport is out on the open road, it’s a pleasant cruiser as this compact SUV simply rolls along.

Ride is firm – 17-inch wheels and low-profile tyres are the culprits here – and handling is impressive.

In terms of refinement the Stonic is mostly, um, fine but there is some tyre noise, especially over rougher roads out of the city, but it’s not terrible.

Every Stonic has three drive modes – 'Normal', 'Sport' and 'Eco' – each of which tweaks throttle response, engine output and transmission settings to best suit the driver and conditions. 

The Stonic is generally a reasonable daily driver, but the absence of adaptive cruise control is a let-down when it comes to highway running.

Not that you’ll be buying a Stonic with the aim of skull-dragging a 3500kg caravan along the highway, but it’s handy to know this Kia SUV’s towing capacities are 450kg (unbraked trailer) and 900kg (braked).

Again, I shouldn't like the 500X but I really don't mind it. It's flawed, which might be why.

The dual-clutch transmission is dumber than a box of loose cogs, lurching from start and looking the other way when you expect it to shift. We know the engine is a good one and I think part of the reason it's so thirsty is the confused way the transmission goes about its business. I'd love to drive a manual to see what it's like.

The 500X initially feels worse than its Jeep Renegade sibling-under-the-skin, which is quite an achievement. Part of that is to do with the ride, which is very choppy below 60km/h. The first 500X I drove wallowed about but this one is a bit tauter, which would be good if you weren't punished with this bounciness.

The seats themselves comfortable and the interior is a good place to hang out. It's reasonably quiet, too, which is at odds with the old-school silliness of its conduct. It feels like Labrador let out of after day kept inside.

And that's where the car I shouldn't like is a car I do like - I really like that it feels like you're on Roman cobblestones, the type that make your knees hurt when you walk on them for a day. The steering wheel is too fat and is at a weird angle, but you kind of square up to it and drive the car like your life depends on it. You have to take it by the scruff, correct the shifts with the paddles and show it who's boss.

Obviously, that's not for everyone. If you drive it really gently, it's a very different experience, but that means going slowly everywhere, which is no fun at all and not at all Italian.

Out of the box, you get seven airbags, ABS, stability and traction controls, forward collision warning, high and low speed AEB, active cruise control, rollover stability, lane departure warning, lane keep assist, blind spot sensor and rear cross traffic alert. That's not bad for a $30,000 car full stop, let alone a Fiat.

There are two ISOFIX points and three top-tether anchors for baby seats. 

The 500X scored a five-star ANCAP rating in December 2016.

Kia’s seven-year/unlimited kilometre warranty applies to the Stonic and you have access to roadside assistance for up to eight years as long as you always get it serviced at an authorised Kia garage.

Servicing intervals are set at every 12 months or 10,000km, whichever comes soonest.

Service costs start at $290 (12 months/10,000km), peak at $727 (48 months/40,000km) and finish at $578 (84 months/70,000km) and the total over seven years is $3367; an average of $481 per workshop visit (correct at time of writing). That’s rather pricey for something in the small SUV market.

Fiat offers a three-year/150,000km warranty, along with roadside assist for the same period. It's not great as more manufacturers shift to five years. 

Service intervals arrive once a year or 15,000km. There is no fixed or capped-price servicing program for the 500X.