Kia Stonic vs Mazda CX-3

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.

It’s easy to see why the Mazda CX-3 remains such a favourite with small SUV buyers. The Evolve grade tested is dynamically capable, space efficient and well equipped for the money. That said, although I don’t like being ageist, as it starts to creep up on a decade on sale, the market leader is giving ground to the competition in key areas including design, fuel efficiency and refinement. It’s time for a new-generation model, but in the age of electrification, will there be one? In the meantime, this evergreen favourite remains a solid urban SUV option.

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.

You’re not going to mistake the current CX-3 for anything other than a Mazda, which speaks to the consistency of the brand’s design approach.

Tightly wrapped and neatly detailed the CX-3's exterior has aged well, and thanks to cosmetic tweaks over time it’s still looking clean and contemporary. 

The step up from 16-inch alloys on the lower Sport and Pure grades to 18-inch rims on this Evolve also lifts the look to a more mature, premium level.  

The interior is a simple, fuss-free environment, but in a small-SUV world moving rapidly towards slick integrated screens for multimedia and instrumentation, the CX-3 is showing its age.

The 8.0-inch media display stands proud in the centre of the dash, almost like an afterthought, and the instrument cluster, while okay from an ergonomic point of view, is dated by an analogue tachometer in the centre and LCD-style read-outs either side.

And although it’s always a subjective call, I’m guessing the Evolve’s white and tan interior trim combination won’t be to everyone’s liking, from an aesthetic or practicality point-of-view.

That said, the interior surfaces across the dash, doors and centre console flow into one another nicely, and brushed metal look highlights around key controls and vents enhance the quality feel.

Speaking of which, physical dials and knobs for adjustment of the ventilation system and audio volume is welcome. Maybe old-school is the best school?

However… the multimedia screen can only be accessed by a rotary dial in the front centre console once the car is mobile (it works as a touchscreen when you’re stationary).

Keenly aware there are various opinions on this set-up when it comes to safety. Touchscreens, by definition, take your eyes off the road ahead, so on one hand it makes sense to transfer control to the rotary dial.

But when you’re using a sequential app like Spotify, it can take a hell of a lot of twirls of that controller to get to where you want to go.

Soon you’re grinding your teeth in frustration which upsets concentration and your eyes are well-and-truly off the road, anyway. 

For what it’s worth, I’d prefer the relative ease of a quick press on the screen rather than having to go ‘around the horn’ to hit your favourite track or podcast.

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 under 4.3m long, less than 1.8m wide and a little over 1.5m tall the CX-3’s footprint is squarely city-sized, and no surprise it shares the Mazda2’s 2570mm wheelbase because it’s underpinned by the same platform as the small hatch.

But there’s more than enough breathing room up front and storage options are creative.

Rather than the ubiquitous single storage box between the front seats the CX-3 offers up an adjustable multi-compartment arrangement, with cupholders and bottle retainers ready to flick into position in multiple locations. 

It’s still covered with a padded lid which doubles as an armrest, and there’s also a generous glove box and bins in the doors with space for large bottles, even an overhead drop-down glasses holder.

Move to the back and there’s a surprising amount of head, leg and shoulder room for an SUV of this size. Sure, it’s no limo, but sitting behind the driver’s seat set to my 183cm position, I was pretty comfortable.

Best for two full-size adults in the rear, although a third can squeeze in for short, relatively uncomfortable journeys. Three up to mid-teenage kids will be fine.  

Rear storage includes bottle shaped cavities in the doors, a map pocket on the back of the front passenger seat only (a weird Mazda habit) and dual pop-out cupholders in the fold-down centre armrest.

No adjustable ventilation outlets in the rear, but in a car this compact, their absence isn’t as big an issue as it might be elsewhere.

For power and connectivity, there are two USB-A sockets in the front (one media, one power-only) as well an SD card slot, an ‘aux in’ jack and a 12V outlet. No power options in the rear, which won’t play well with the kids.

With the back seat upright, boot capacity is an okay 264 litres. Enough to accommodate either the largest 124L or the smaller 95L and 36L suitcases from out three-piece set. But not all of them together.

With a bit of not so gentle persuasion, the large CarsGuide pram just squeaked in, but lower the 60/40 split-folding rear backrest and available space expands to 1174L.

Tie-down anchors to help secure loose loads is a plus and a speed-limited space-saver spare sits under the boot floor.

And if you need to hook up a small boat or other lightweight trailer, the CX-3 Evolve is rated to 1200kg (braked) and 640kg (unbraked).

At $31,050, before on-road costs, the G20 Evolve sits in the middle of a five-model CX-3 line-up, which starts with the $G20 Sport ($26,800) and finishes with the G20 Akari ($38,620).

It competes with nine other light SUVs, and to the end of November 2023 has more than doubled the sales volume of its nearest competitors.

Supply constraints may have played a part, but the CX-3 Evolve is way ahead of its direct rivals, the Hyundai Venue Elite ($28,750), Kia Stonic GT-Line ($30,790), Toyota Yaris Cross GXL Hybrid ($33,000) and VW T-Cross 85TFSI Life ($30,990).

Aside from the safety and performance tech we’ll get to shortly, standard equipment includes auto LED headlights and DRLs, rain-sensing wipers, climate control, cruise control, a leather-trimmed steering wheel, an 8.0-inch multimedia screen, six-speaker audio with digital radio plus Android Auto (wired) and Apple CarPlay (wireless) connectivity, sat-nav, keyless entry and start, front and rear parking sensors, a reversing camera and 18-inch alloy wheels.

Standard seat trim is white synthetic leather with tan synthetic suede inserts (also applied to the doors and dash).

That’s a pretty handy roll-call of included features in this part of the market, which meets or exceeds similarly priced competitors.

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.

The CX-3 is powered by a 2.0-litre, four-cylinder petrol engine sending drive to the front wheels via a six-speed auto transmission.

The all-alloy unit features direct-injection and variable valve timing to produce 110kW at 6000rpm and 195Nm at 2800rpm.

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.

Mazda’s official fuel economy number for the combined (ADR 81/02 - urban, extra-urban) cycle is 6.3L/100km, the 2.0-litre four-cylinder emitting 143g/km of CO2 in the process.

That’s an impressively small emissions figure for a 2.0L petrol engine, more in line with smaller-capacity engines.

Stop-start is standard and over a week of city, suburban, and some freeway running, we averaged 7.4L/100km (at the pump), while the car’s on-board computer indicated 7.1L/100km for the same period.

Minimum fuel requirement is 91 RON ‘standard’ unleaded (or E10) and you’ll need 48 litres of it to fill the tank.

Using the official number, that translates to a driving range of around 760km, which drops to roughly 650km using our real-world figure.

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).

The CX-3’s compact size makes it easy to steer through tight city and suburban streets. 

It weighs in at just under 1.3 tonnes, which is marginally lighter than most of its key competitors, and acceleration is sprightly with the 0-100km/h covered in less than nine seconds.

Close to 200Nm of pulling power is plenty for a car in this class and unusually for a non-turbo engine, peak torque arrives at a relatively low 2800rpm, so there’s ample mid-range urge.

The downside is the 2.0-litre, four-cylinder engine makes its presence felt inside the cabin, with mechanical noise noticeable even at around-town speeds. Not a conversation stopper by any means, but it’s there.

No complaints with the six-speed auto transmission. It’s smooth and the ratios keep the car in its performance sweet spot nicely. It also shifts into sequential ‘Manual’ mode if your prefer or need to call the shots.

Electric ‘drive-by-wire’ throttle response is smooth, but flick the console-mounted rocker switch to ‘Sport’ and things become more urgent, with the transmission shifting down earlier and holding on to ratios longer.

The steering is evenly weighted for easy parking and road feel is good. Speaking of parking, a 10.6m turning circle is large-ish for such a diminutive SUV, but surprisingly, not out of line for the category.

Suspension is by struts at the front and torsion beam at the rear, and despite the CX-3’s relatively short wheelbase and the Evolve’s bigger 18-inch wheels, ride comfort over typically pock-marked urban roads is surprisingly good. The Toyo Proxes R52A (215/50) tyres are also quiet and reassuringly grippy.

Braking is by generous ventilated discs at the front and solid rotors at the rear, and they’re more than up to the task of calmly washing off speed in this city-sized SUV. 

The front seats proved comfy and supportive on test, although you’ll have to step up to the next Touring grade to score electric adjustment for the drive or lumbar control of any description.

The CX-3 had a maximum five-star ANCAP score from 2015 to 2022, but the independent safety body’s assessments have a seven-year shelf life and the compact SUV is currently ‘unrated’.

That said, active (crash-avoidance) tech is up to the mark with AEB (forward and revers with front pedestrian detection), blind-spot monitoring, lane departure warning, front and rear parking sensors, rear cross-traffic alert, a reversing camera and smart city brake support (front and rear) included.

If a crash is unavoidable, there are six airbags onboard (dual front, dual front side and side curtain), the CX-3 showing its age somewhat with the absence of the now increasingly common front centre bag designed to minimise head injuries in a side impact.

There are three top tethers for baby capsules/child seats across the rear row with ISOFIX anchors on the two outer positions.

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.

Mazda covers the CX-3 with a five-year/unlimited-kilometre warranty, which is the current market standard. Roadside assist is included for the duration. 

Recommended service interval is 12 months/15,000km, and the average annual cost for each workshop visit, for the first seven years, is $438.

An average under $450 is alright, but Toyota’s capped price figure of $195 per workshop visit for the first five years of C-HR ownership puts it in perspective. Mind you, Toyota’s charges step up considerably after that fifth year.