Kia K4 vs Toyota GR Corolla

What's the difference?

The new Kia K4 GT-Line has a lot to offer - an interesting design, lots of features and a pleasant driving experience. It’s not without its quirks and there are times when a more powerful engine may have improved it for me as a long-term prospect as I do some big kays every year but it ticks the boxes as a friendly urban dweller.

The GR Corolla had a lot to live up to before, given the likes of the GR Yaris and GR86 fit their briefs so well.

Now, with a little more daily useability and a little more performance, the GR Corolla is even better at both sides of its Jekyl and Hyde personality.

Note: CarsGuide attended this event as a guest of the manufacturer, with accommodation and meals provided.

Have to admit I wasn’t convinced on the design of this new sedan at first as it can look a little out of sorts from certain angles. But the more time I spend with it, the more I appreciate its sharp lines and sporty rear shaping.

The small sedan market doesn't have a lot of options now because SUVs are so popular but it's nice to see a design that stands out and the fang-like LED light design at the front and rear, as well as the 18-inch alloy wheels make the K4 look very cool.

The rear doors look sleek because the handle has been hidden in the C-pillar and the K4 is particularly striking in our test model's 'Wave Blue' ($600 RRP) paint colour.

Head inside and you'll find a cabin that looks slick with a two-tone synthetic leather upholstery that feels supple underhand and a plethora of soft touchpoints under all the bits that touch.

The black headliner creates a posh space but the sunroof helps the cabin to feel airy when you need it to.

The dashboard isn't too wide, preferring a sharply linear shape and is headlined by a massive display panel that houses dual 12.3-inch screens and a 5.0-inch climate panel.

There is still a strong presence of plastics inside but you don’t tend to focus on them.

Unlike some other new cars hitting our market, the K4 hasn’t done away with its buttons and dials - and there’s enough to satisfy those who don’t like to rely on a screen for everything. The extra traditional element of the physical gear selector adds to its charm as well. 

The Corolla already looks more sporting than most hatchbacks even before the GR treatment, but a few tweaks up front, some wider wheel arches and a third exhaust exit at the back have this thing looking almost ready for a rallycross.

The only downside to that is the changes are relatively minor from some angles. If you weren’t aware of the GR version, you'd need to see the GR Corolla from the front or spot that exhaust to know something was up.

The update has, however, ushered in a change at the front bumper, where the air intakes have been adjusted for improved airflow “to the radiator, intercooler, brake ducts, sub radiator and automatic transmission fluid cooler”

In part, this was necessary to help cool the new automatic gearbox, though it does generally help with overall cooling.

While the GR Corolla looks the part, there’s more function to it. The air that passes in through the side intakes at the front is vented to a duct in the wheel arch that also cools the brakes.

It’s the same as the GR Yaris sibling in terms of the philosophy behind aerodynamics and cooling in many ways, though much of the Yaris is bespoke, where on the Corolla, parts have been attached to the standard body.

Like the outside, the inside of the GR Corolla is mostly the same bones as its non-hot-hatch relatives, but the aforementioned sports seats, leather trim and aluminium pedals are all fairly strong hints this isn’t quite ‘hire car spec’.

The K4 feels big for the class, especially compared to its nearest rivals and that translates to a cabin that feels adult-friendly in both rows. An impressive feat for a small sedan.

Access is the only time you will have moments of 'I should have opted for an SUV'. That's because you will get in your daily squats sliding in and out of the K4 due to its 140mm ground clearance.

The rear doors also feature a wide wing that juts out from the door handle and it catches your hip almost every time you go to close the door.

The wide front seats offer lots of comfort with thick padding and long under-thigh-support. The driver's side is powered with adjustable lumbar support but the passenger seat only offers manual adjustments, which is surprising for a top-grade model. However, both front seats enjoy heat and ventilation functions.

The back bench seat offers similar comfort to the front with seat padding and length but it's not terribly wide and two adults (or child car seats) will fit best.

Amenities and storage is decent for the class with each row enjoying four drink holders and two USB-C ports. Front rowers also get a wireless charging pad and 12-volt socket.

In the front there is a large glove box that fits more than just an owner's manual, a mid-size middle console and a centre console that features retractable cupholders to open up the space if you need to. A dedicated phone cradle with small spaces on each side rounds up individual storage for the front.

In the rear there are two map pockets, a small item cubby next to the USB-C ports and a pair of directional air vents, reading lights and a fold-down armrest.

The boot space is massive for the class at 508L (that's nearing mid-size SUV territory) but the aperture is narrow and I couldn't fit my big booster seat through the opening.

The boot is quite deep as well and you may find yourself climbing into it to retrieve items that roll into the back.

The rear bench seat has a 60/40 split which can help with storage and there is a temporary spare tyre underneath the floor.

While you don't get a powered tailgate in this model, the lid isn't heavy to operate and has a proximity opening function that keeps it practical when you have your hands full.

This just means when you approach and stay near the boot with the key fob on your person the boot lid will pop open for you.

The 12.3-inch touchscreen multimedia system looks great with crisp graphics and a responsive touchscreen. The menus are in an easy-to-understand layout which you'll get accustomed to in no time. The 5.0-inch climate display sits to the right of this system and it's nice to have it on display all the time.

The 12.3-inch digital instrument cluster isn't all that customisable but it's easy to read with large text and a small menu screen that shows nav directions, trip info or a compass.

The built-in satellite navigation system is easy to get going and to cancel a route guidance, it's a one button affair which is great for when you're on the go.

The system features wired and wireless Apple CarPlay and Android Auto. The CarPlay is simple to connect to and retained a steady connection this week with feedback from my callers that my voice was clear on calls.

As far as hatchbacks to build a daily-useable hot hatch upon go, the Corolla is a relatively solid starting point in terms of ergonomics.

Physical buttons and controls for things like climate are within reach for most functions of the car, though the multimedia touchscreen itself isn’t the most up-to-date.

The seats are comfortable but hold you firmly in place, and the steering wheel, pedals, and shifter are all in the correct positions for engaging driving - particularly important in the manual version.

The storage space is where the GR Corolla disappoints a little. There’s door card space for a water bottle, cupholders, the wireless device charger, but not really anywhere for larger items.

Behind the front row, adults will find themselves a little cramped in terms of kneeroom, while dark interior materials make the second row feel poorly lit.

Further back in the Corolla is the 213-litre boot, which is pretty small even for a hatchback, although Toyota lists a maximum 503 litres with the seats folded down.

Under the boot floor is a tyre repair kit, rather than a spare tyre. Keep that in mind if undertaking a road trip.

The 2025 Toyota GR Corolla comes in just one grade now, the highly-speced GTS, which starts from $67,990 plus on-road costs for the six-speed manual, but it's now available with an eight-speed automatic for $70,490.

Sounds like a lot for a Corolla, and it’s a little more than the $64,190 asking price the GTS manual wore before, but compare it to the highly-regarded Honda Civic Type R ($74,100) or the do-it-all VW Golf R ($70,590) and it lines up.

While the GTS has plenty of features for the price, they’re not all focused on the comfort of the interior.

For example, the synthetic leather and suede sports seats are manually adjustable, even though they are heated.

The 8.0-inch multimedia touchscreen is similar to that in the standard Corolla, too, plus dual-zone climate, USB-C ports, the wireless phone charger and JBL Audio system are all expected features of a hatchback at more than $60,000.

The GR Corolla does however gain heating for the leather-wrapped sports steering wheel, plus leather trim for the parking brake and shifter too. It also scores aluminium pedals.

There’s a lot more under the skin when it comes to the GR, some of which is visible via controls in the cabin, but we’ll come to that.

The flagship grade is front-wheel drive and has a 1.6-litre four-cylinder, turbo-petrol engine that produces up to 142kW of power and 265Nm of torque giving this a more powerful presence than its non-turbo siblings (which only produce up to 112kW/192Nm).

However, while the power is adequate for the GT-Line there are times when the engine sounds like it's working a bit too hard.

The eight-speed torque-converter automatic transmission can also become flustered as it moves through the lower gears, especially when you’re accelerating quickly.

On the whole, the power delivery and outputs are more than enough for a city environment and the odd road trip.

The GR Corolla’s 1.6-litre three-cylinder turbocharged petrol engine is now a little torquier than before, with outputs now 221kW (at 6500rpm) and 400Nm (between 3250 and 4600rpm) thanks to an extra 30Nm.

The G16E-GTS engine can now drive the Corolla’s four wheels through a choice of gearboxes, either the existing six-speed manual or an eight-speed torque converter automatic.

As well as the usual drive modes, Eco, Normal and Sport, the Corolla’s GR-Four all-wheel-drive system can split the torque to the front or rear wheels via its limited-slip diffs.

Normal, Track and Gravel modes can distribute drive either 60:40 front/rear in Normal, 53:47 in Gravel, or variably depending on conditions and need for acceleration in Track.

Toyota hasn't provided a 0-100km/h time for the 2025 GR Corolla in either variant, but the auto should knock it over in under five seconds, with the manual taking a little longer.

With an official combined (urban/extra-urban) cycle fuel usage figure of 6.7L/100km and a fuel tank size of 47L, this model has a theoretical driving range of 701km. That does sit around 80 kays less than some of its rivals but it’s still sufficient for those wanting to do the odd road trip!

My on-test fuel usage has popped out at 9.2L/100km, which is based on figures achieved at the pump (32.05L) and my km travelled (348km).

I’ve done mostly urban trips this week with one longer open-road drive and overall I’m not too surprised by that figure because I’ve been pushing it hard but it could be better.

The K4 is a simple gal because Kia recommends a minimum 91 RON unleaded petrol to be used for all models.

Toyota’s claimed fuel consumption for the GR Corolla with a manual gearbox hasn't changed from the previous 8.4L/100km, which isn’t bad for a sports car.

With the auto, Toyota says it burns through the fuel faster at a rate of 9.5L/100km.

In either case, the Corolla’s 50-litre fuel tank needs to be filled with premium 98 RON petrol, and theoretically could provide more than 500km of driving if conditions and your driving style are both perfect for efficiency.

Chances are, however, you’ll feel the need to put your right foot down a little harder than they did during WLTP testing, if for no other reason than to hear the turbo flutter when you lift off.

As mentioned earlier, the power is adequate to move this car around on the open-road but you have to be a little aggressive on hills to keep your speed consistent.

It’s not always quick off the mark, though, and you’ll notice that when you have to cross traffic or enter a roundabout - so allow for extra car lengths. Once you get going, it’s responsive in the city.

The steering is sports-stiff and so is the suspension. This makes the handling feel nimble in turns and sure-footed when doing quick lane changes but you hear and feel every bump in the road. 

On-road comfort is okay around the city but the road noise is very loud inside the cabin and is particularly noticeable at higher speeds. You’ll have to raise your voice to chat to passengers in the back when you're on the highway.

The K4 has a small turning circle of just 10.7m and you can easily do a U-turn in spaces that others might have to do a three-pointer. This made the K4 feel friendly in small car parks and on ramps.

The direct steering makes it easy-enough to park, as does the reversing camera and front/rear parking sensors but I’m pretty disappointed that at the top grade-level, you miss out on a 360-degree camera system (tsk, tsk, Kia).

The GR Corolla isn’t as engaging to drive as the GR Yaris, it’s not as honed as one particular rival, the Honda Civic Type R, and it’s not as ‘nice’ as the Golf R.

But the GR Corolla is still an excellent car to drive, and it’s better for its update. In fact, the two major gripes I had with the pre-facelift car have been addressed.

I was in a unique position to be able to compare the old and new versions of the GR Corolla as I drove a MY 2024 version a week prior to the media launch for the 2025 model.

The first and probably biggest issue I had was that the Corolla’s suspension seemed like it must have been rather stiff and the body bracing quite rigid for a car riding on 19-inch wheels to let that much road noise and that many harsh bumps into the cabin.

Though it wasn’t mentioned before the on-road drive loop, the car felt more compliant without sacrificing ability and seemed much more suited to daily duties.

Toyota’s product team confirmed there had been tweaks made to the rear suspension geometry and that I wasn’t just imagining it.

The second issue is more for the sake of passengers who may be less agreeable to the three-pot thrum resonating along the exhaust underfloor.

Toyota has solved this by putting a slight mute on the pipes in the Eco drive mode, so the car is now just ‘a bit’ lairy rather than full boy racer.

Generally, it’s hard not to compare the GR Corolla to the smaller (but original) GR hatch, the Yaris. Especially having driven them back-to-back at the media launch.

Without leaning too much on that, I will say that while the Yaris feels like a rally car that's been modified to be road-legal, the Corolla feels more like a road car that was tweaked for rallying.

The Corolla stops just short of being too ‘raw’ for everyday use in most aspects, but it’s still very capable when it comes to driving fast. 

Like its suspension, the steering feel is dialled in for feedback without being too rough, and allows you to corner accurately without feeling like you need to second-guess or adjust inputs.

When it comes to handling, it doesn’t feel like the Corolla is entirely leaning on the Yokohama Advan tyres for grip, as it feels tied-down and doesn’t pitch and roll through corners.

The duality of the GR Corolla is helped by its drive mode and differential settings and even on track can help you lean into your own driving style.

While the rear-biased 30:70 setting previously made for a slightly tail-happy hot hatch, the new variable Track setting does a fabulous job of keeping the drive where it needs to be, though it turns out it’s also rather handy for sliding the Corolla around a wet skid pan.

Another neat trick is the GR’s handbrake, same as the Yaris, which can disconnect the rear diff when engaged so you don’t need to dip the clutch pedal in the manual version when indulging in handbrake turns.

It will set you back to 2WD mode when the drivetrain overheats, however, or at least when its sensors suspect the drivetrain has overheated - something that only happened after a lot of handbrake turning and spinning wheels as the hatchback slid sideways.

The Corolla’s brakes are ventilated 356mm front and 297mm rear discs, and doesn't lose stopping power even after plenty of tight, twisting road driving where the brakes and the sticky Yokohama Advan tyres copped a workout.

The new auto transmission is also a delight. It's calm during normal driving but snappy with shifts in Sport mode and set to manual gear selection. It won’t really cooperate on a rapid drive of its own accord.

The only criticism of the auto gearbox (aside from being less engaging than the manual, but that’s your own choice) is that the shift paddles behind the wheel feel a little plasticky, but I’m nitpicking at this point.

The Corolla’s not lacking in safety kit, with a healthy list of passive and active features as well as a series of seven airbags and three ISOFIX points along the rear seats.

ANCAP tested the non-GR Corolla in 2018 and awarded it five stars, though that score is now outdated. It’s not clear if the car’s updated tech would manage five stars again, though the car is clearly structurally sound.

Aside from the usual expectations like auto emergency braking (AEB), a blind spot monitor, parking sensors front and rear plus a decent reversing camera, the GR Corolla also has rear cross-traffic alert and Toyota’s ‘Safety Sense’ suite of active kit.

That includes a pre-collision safety system with pedestrian detection and cyclist detection in daylight, active cruise, intersection assist, emergency steering assist, lane departure and lane-trace assist, road sign detection for speed limits and auto high beam.

The K4 GT-Line is offered with Kia’s seven-year/unlimited-kilometre warranty. That’s a pretty good term for the class and there is a seven-year capped price servicing program for a flat $3877 (averaging $554 per service), which is slightly more expensive than others in the class.

Servicing intervals could get annoying if you do big kays every year as they're spaced at every 12 months or 10,000km, whichever occurs first.

Toyota offers a five-year/unlimited kilometre warranty plus an extra two-year warranty on the GR Corolla’s engine and driveline.

There’s also a capped price on the first three years of servicing for the GR Corolla at $310 per service.

The downside to the servicing arrangement is that intervals are six months or 10,000km, whichever comes first. That's more regular than a usual schedule and it means potentially pricier servicing for the seventh visit onwards.