Kia K4 vs Hyundai I20

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 i20 N hatch is so much fun, and not in a special occasion kind of way. It’s an affordable, compact performance car that’ll put a smile on your face no matter where or when you drive it. The Fiesta ST and Polo GTI have a worthy new playmate. I love it!

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. 

Hyundai’s current WRC challenger may be a coupe but this angry little five-door hatch absolutely looks the part.

We’re assured the N is the only current-generation i20 we’ll see in the Aussie market, and it runs with a relatively low (101mm) ground clearance, a grille pattern inspired by a chequered flag, black mirror shells, and menacing, angular LED headlights.

The ‘Satin Grey’ 18-inch alloys are unique to this car, as are the side skirts, raised rear spoiler, darkened LED tail-lights, a ‘sort-of’ diffuser under the rear bumper and a single fat exhaust exiting on the right-hand side.

There are three standard paint options - ‘Polar White’, ‘Sleek Silver’, and N’s signature shade of ‘Performance Blue’ (as per our test car) as well as two premium shades - ‘Dragon Red’, and ‘Phantom Black’ (+$495). A contrasting Phantom Black roof adds $1000.

Inside, the N-branded sports seats, trimmed in black cloth, featuring integrated headrests and blue contrast stitching, are unique to the i20 N. There’s a leather-trimmed sports steering wheel, handbrake lever and gear knob, as well as metal finishers on the pedals.

The 10.25-inch digital instrument cluster and same-sized multimedia screen look slick, and ambient lighting heightens the hi-tech mood.

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.

Although it’s just 4.1m long, the i20N is impressively space efficient with decent room up front and a surprising amount of head and legroom in the back.

Sitting behind the driver's seat, set for my 183cm position, I had plenty of head and legroom, although, understandably, three people across the back will need to be kids or understanding adults, on a short journey.

And there are plenty of storage and power options, including the wireless device charge pad in front of the gear lever, which doubles as an oddments tray when not in use, two cupholders in the front centre console, door bins with room for large bottles, a modest glove box and a lidded cubby/armrest between the front seats.

No armrest or air vents in the back, but there are map pockets on the front seat backs, and again, bins in the doors with room for bottles

There is a media USB-A socket and another for charging, as well as a 12V outlet in the front, and another USB-A power socket in the back. Hyundai suggests the latter could be handy for powering track day cameras. Great idea!

Boot space is impressive for such a compact hatch. With the rear seats upright there’s 310 litres (VDA) available. Fold the 60/40 split-folding rear backrest and no less than 1123 litres opens up.

A dual-height floor can be flat for long stuff, or deep for tall stuff, there are bag hooks provided, four tie down anchors, and a luggage net included. The spare is a space saver.

At $32,490, before on-road costs, the i20 N is to all intents and purposes the same price as Ford’s Fiesta ST ($32,290), and the VW Polo GTI ($32,890).

It’s offered in one spec only, and aside from the standard safety and performance tech, this new hot Hunday boasts a solid standard features list, including: climate control, LED headlights, tail-lights, daytime running lights and fog lights, 18-inch alloys, Bose audio with Apple CarPlay/Android Auto and digital radio, cruise control, nav (with live traffic updates), rear privacy glass, keyless entry and start (as well as remote start), sports front seats, the leather-trimmed sports steering wheel, handbrake lever and gear knob, alloy-faced pedals, auto rain-sensing wipers, power-folding exterior mirrors, plus 15W Qi wireless smartphone charging.

There’s more, like the 10.25-inch ‘N Supervision’ digital instrument cluster, plus a same-size multimedia touchscreen in the centre of the dash, a track maps feature (Sydney Motorsport Park is already in there), as well as an acceleration timer, g-force meter, plus power, engine temperature, turbo boost, brake pressure and throttle gauges. 

You get the idea, and it goes toe-to-toe with the Fiesta ST and Polo GTI.

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 i20 N is powered by a turbo intercooled 1.6 litre four-cylinder petrol engine, driving the front wheels via a six-speed manual gearbox and Torsen-type mechanical limited slip differential.

The all-alloy (G4FP) engine features high-pressure direct-injection and an overboost function, producing 150kW from 5500-6000rpm, and 275Nm from 1750-4500rpm (rising to 304Nm on overboost at max throttle from 2000-4000rpm).

And the engine’s mechanical ‘Continuously Variable Valve Duration’ set-up is something of a breakthrough. In fact, Hyundai claims it as a world’s first for a production engine.

Not timing, not lift, but variable duration of valve opening (managed independently of timing and lift), to strike the optimal balance between power and economy across the rev range.

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.

Hyundai’s official fuel economy figure for the i20 N, on the ADR 81/02 - urban, extra-urban cycle, is 6.9L/100km, the 1.6-litre four emitting 157g/km of C02 in the process.

Stop/start is standard, and we saw a dash-indicated average of 7.1L/100km over several hundred km of city, B-road and freeway running on the occasionally ‘spirited’  launch drive.

You’ll need 40 litres of ‘standard’ 91 RON unleaded to brim the tank, which translates to a range of 580km using the official figure and 563 kays using our launch test drive number.

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).

Unusually for a manual car, the i20 N features a launch control system (with an adjustable rpm setting), which we found fiddly to get working, but with or without it, Hyundai claims a snappy 0-100km/h time of 6.7sec.

And it’s such a pleasure to steer a car with a slick-shifting manual gearbox. The six-speed unit features a rev-matching function accessed via the press of a racy red button on the steering wheel. 

Buf for those who prefer an old-school, double-shuffle, heal-and-toe tap dance across the pedals, the relationship between the brake and accelerator is perfect. 

And if you’re keen on Walter Rohrl-style left-foot braking, to help steady the car or steer it in fast cornering, the ESC is switchable through to Sport mode or completely off, allowing fuss-free simultaneous brake and throttle application.

There’s even a shift-timing indicator near the top of the instrument cluster, with colour bars closing in on each other as the tacho needle pushes towards the rev limiter. Fun.

Engine and exhaust noise is a combination of a raspy induction note and adjustable crackle and pop out the back, courtesy of a mechanical flap in the exhaust system, adjustable through three settings in N mode.

Traditionalists may not be thrilled by the addition of in-cabin synthetic enhancement of all of the above, but the net effect is thoroughly enjoyable.

It’s worth remembering in this context N stands for Namyang, Hyundai’s sprawling proving ground south of Seoul where the car was developed, and the Nürburgring where this go-fast i20 was fine-tuned.

The body has been specifically reinforced at 12 key points, along with additional welds, and “bolt-in underbody structures” to make the i20 N stiffer and more responsive.

The strut front, coupled (dual) torsion beam rear suspension has also been set up with increased (neg) camber and a revised anti-roll bar at the front, as well as specific springs, shocks and bushings.

A compact, mechanical LSD is added to the mix, and grippy 215/40 x 18 Pirelli P-Zero rubber was produced specifically for the car and is stamped ‘HN’ for Hyundai N. Impressive.

The end result is outstanding. Low-speed ride is firm, with suburban bumps and lumps making their presence felt, but that’s what you’re signing on for in a hot hatch at this price point.

This car feels balanced and well buttoned down. Power delivery is agreeably linear and at a fraction over 1.2 tonnes the i20 N is light, responsive and nimble. Mid-range urge is strong.

Steering feel is good, with assistance from a column-mounted motor taking nothing away from an intimate connection with the front tyres.

The sports front seats proved grippy and comfortable over long stints behind the wheel, and playing with the multiple N drive modes tweaking the engine, ESC, exhaust, and steering just adds to the involvement. There are twin N switches on the wheel for quick access to custom set-ups.   

And that Torsen LSD is brilliant. I tried my best to provoke a spinning inside front wheel on the exit of tight corners, but the i20 N just puts its power down without so much as a chirp, as it rockets towards the next bend.

The brakes are 320mm vented at the front and 262mm solid at the rear. Calipers are single piston, but they’ve been beefed up and fitted with high-friction pads. The master cylinder is bigger than the standard i20 and the front rotors are cooled by lower control arm mounted air guides blowing through vented knuckles.

The launch i20 N fleet of around half a dozen cars copped an hours long hot lap pounding at Wakefield Park Raceway, near Goulburn NSW without drama. They’re well up to the task. 

One niggle is a large turning circle. The data sheet says 10.5m but it feels like the car is carving a wide arc in U-turns or three-point turns.

A 2580mm wheelbase between the bumpers of a 4075mm car is substantial, and the steering’s relatively low gearing (2.2 turns lock-to-lock) no doubt has a lot to do with it. The price you pay for quick turn-in.

Although it hasn’t been assessed by ANCAP or Euro NCAP, the headline on active safety tech in the i20N is the inclusion of ‘Forward Collision-Avoidance Assist’, which is Hyundai-speak for AEB (city and urban speed with pedestrian detection).

And from there it’s assist city, with ‘Lane Keeping Assist’, ‘Lane Following Assist’, ‘High Beam Assist’, and ‘Intelligent Speed Limit Assist.’

Followed by all the warnings: ‘Blind Spot Collision Warning’, ‘Rear Cross-Traffic Collision Warning’, ‘Driver Attention Warning’, and ‘Parking Distance Warning’ (front and rear).

The i20 N also features a tyre pressure monitoring system and a reversing camera. But if, despite all that, a crash is unavoidable there are six airbags on-board - driver and front passenger front and side (thorax), and side curtain - as well as three top tether points and two ISOFIX locations across the back row for child seats.

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.

Hyundai covers the i20 N with a five year/unlimited km warranty, and the ‘iCare’ program includes a ‘Lifetime Service Plan’, as well as 12 months 24/7 roadside assist and an annual sat nav map update (the latter two renewed free-of-charge each year, up to 10 years, if the car is serviced at an authorised Hyundai dealer).

Maintenance is scheduled every 12-months/10,000km (whichever comes first) and there’s a pre-paid option which means you can lock in prices and/or fold service costs into your finance package.

Owners also have access to the ‘myHyundai’ online portal providing details on the car’s operation and features as well special offers and customer support.

Service for the i20 N will set you back $309 for each of the first five years, which is competitive for a hot hatch in this part of the market.