Hyundai Ioniq 9 vs Lexus Rx450H+

What's the difference?

The Hyundai Ioniq 9 is a big, comfortable and powerful SUV that ticks lots of boxes. Sadly, though, the electric power that makes it such a treat to drive is probably the same thing that will keep it off plenty of shopping lists. For now, at least.

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

The new Lexus RX450h+ Sports Luxury is packed with a wealth of premium features and strikes a solid balance between refinement and practicality. There are enough thoughtful touches that make everyday driving a little easier.

You’ll get the most out of the plug-in hybrid powertrain if you’re able to charge it regularly; ideally every day. That might not always be practical for busy people on the go, but overall, the RX450h+ manages to blend efficiency with Lexus’ signature comfort and quality.

I'm going to sound like a bad football coach here, but the Ioniq 9 is a tale of two halves, at least when it comes to the exterior.

And I mean that literally. The front half is lovely, with a smooth, rounded nose, two stacks of LED lights that build the horizontal on top of the vertical and a clean, modern road presence.

The back half, however, isn't. It took me a while to put my finger on it, but it suddenly dawned on me that it gives off old-school station wagon vibes that, for me at least, don't gel with the rest of the design.

Inside, though, it is a complete picture, with my only complaint that the steering wheel feels a touch too big – though I like it's more minimalist design.

Elsewhere, the materials are lovely to look at and touch – even the dash panel insert that reminds me a bit of snakeskin pants – the seats are comfortable and the tech works well.

One word on the digital wing mirrors, though. They are one cost option I wouldn't be ticking the box for. I find them off-putting, not least because they seem to zoom-in so close to the car behind that you can almost see what part of the people behind's breakfast is residing between their teeth. It feels invasive.

Plus, all you're really doing is swapping a large mirror outside the car for a big screen inside it. Conventional mirrors for the win.

The RX isn’t breaking new ground with its plug-in hybrid design, but it still delivers that signature Lexus understated refinement.

The strong, flowing body lines, 21-inch alloy wheels and updated 'spindle grille' all give it presence without screaming for attention.

And in a segment where boxy and bulky designs tend to dominate, the RX’s swoopy silhouette helps it stand apart in all the right ways.

Inside, the cabin feels considered and luxurious. There's a heavy use of premium materials, including the leather and suede upholstery, plush soft-touch surfaces and the big, crisp displays that make the space feel modern and high-end.

The panoramic sunroof brings in loads of natural light, too, which is especially welcome given the dark headliner that might otherwise feel a little heavy.

If I have one gripe, it’s the thin steering wheel, which doesn’t quite match the otherwise solid, tactile feel of the rest of the interior. But overall, the cabin is a space that feels luxurious and well-executed. It's quietly confident, just like the RX.

It’s a big unit, the Ioniq 9, measuring more than five metres long, just under two metres wide and around 1.8 metres high. Weight is a hefty 2.7 tonnes at its heaviest, too, while braked towing capacity is pegged at 2.5 tonnes.

So, big numbers and a big vehicle with big storage. With all three rows in place, you get 338 litres of boot space. But treat it like a five-seater and that increases to 908 litres. Drop both rows, and you’ll have a massive 2410 litres at your disposal.

The room in the middle row is ample for full-size adults, especially if you tick the box for the cushy six-seat layout, and the rear doors feel massive, so when opened you can step through to the third row with ease, too.

Once in there, you'll find an impressively luxe space. The room isn't ridiculous, but my 175cm got in easily enough, and then fit pretty easily, too. And the addition of USB charge ports, air vents, speakers and an automatic recline function for the third row will lift the mood for whoever you put back there.

The RX cabin is thoughtfully laid out and impressively practical, with a premium feel that doesn’t come at the cost of everyday usability.

Up front, there’s plenty of space for driver and passenger, yet the stepped dash design brings a sense of intimacy. The electric front seats are seriously comfortable, with four-way lumbar support and extra adjustment functions that make this an easy choice for long drives.

Storage options are generous, too. There’s a clever dual-opening centre console, large glove box, multiple phone-sized shelves, map pockets and a couple of cup- and drink holders in each row.

Charging is taken care of by four USB-C ports, one USB-A port and a wireless charging pad.

Tech is up-to-date and well-integrated. The upgraded 14-inch media display looks crisp, supports wireless Apple CarPlay and Android Auto, and is paired with a revamped 12.3-inch digital instrument cluster and a colour head-up display.

The cluster’s new layout is modern and much easier to read than the previous offering. The digital rear view mirror also earns its keep when the cabin’s packed with passengers or gear.

One of my favourite touches? The seat controls on the side of the front passenger seat. It makes quick work of moving the seat forward, especially helpful when you’ve got a kid clambering in with a school bag full of projects.

Access to the rear row is easy, but the stadium-style seating, where you're perched noticeably higher than those in the front, won’t be for everyone.

That said, the rear seats are plush and padded, though they lack side bolsters, which rear passengers might notice during cornering.

Legroom is generous and the hardened kickplates are a dream to clean when your child’s treating the seatbacks like a climbing wall.

My eight-year old gives the back seat a glowing review, thanks to its creature comforts, including rear climate control, directional air vents, seat heating/ventilation on the outboard seats, two USB-C ports and retractable sun-blinds, which are a crowd favourite in our household.

There are three top-tether anchor points, and the bench is wide enough to fit three child seats, though bulky booster seats might be tricky due to the raised seating height.

At the back, the boot is well set up for families, offering electrically folding rear seats, a 12-volt socket, flat loading floor, and a hands-free powered tailgate.

Under the floor, there’s a small compartment for your charging cables (Lexus throws in two!) and a usable 612L of capacity when all seats are in use. One downside, though, is the lack of a spare tyre as you just get a tyre repair/inflation kit.

There are four variants in the RX range, and we’re testing the 450h+ Sports Luxury AWD, which sits just below the flagship and packs in plenty of premium kit for its $123,500, before on-road costs, price tag.

That makes it slightly more affordable than its main PHEV rivals; the BMW X5 xDrive50e (from $125,885 MSRP) and the Volvo XC90 Ultra (from $124,466 MSRP).

The Volvo does offer seven seats to the Lexus’ five, which may matter for larger families, and both rivals also outdo the RX on electric-only driving range - 65km in the RX compared with 77km in the Volvo XC90 and a generous 101km in the BMW X5.

Still, the RX fights back with a seriously stacked features list. Highlights include a panoramic sunroof, 10-way powered front seats with heating and ventilation, electrically folding rear seats (also heated and ventilated in the outboard positions), and a heated, power-adjustable steering wheel. Sound is taken care of by a premium 21-speaker Mark Levinson surround system.

Technology has had a solid upgrade with the 14-inch touchscreen multimedia display, 12.3-inch digital instrument cluster, digital rearview mirror, colour head-up display, live traffic navigation, wireless Apple CarPlay and Android Auto, 4G connectivity, four USB-C ports, one USB-A port and a fast wireless charging pad.

There’s also access to the 'Lexus Connected Services' app, allowing you to remotely lock or unlock the vehicle, pre-set the cabin temperature via three-zone climate control, configure driver profiles and even use your phone as a digital key.

Practical features include keyless entry and start, rain-sensing wipers, dusk-sensing LED headlights, rear sun-blinds, intelligent seatbelt reminders for the first two rows, a child presence alert and a hands-free powered tailgate. However, due to the plug-in hybrid system there’s no spare tyre, just a tyre repair kit.

There's only the one configuration available here, with Australia's Ioniq 9 a dual-motor AWD producing a combined 314kW and 700Nm – the latter ensuring this heavy EV never feels dull or sluggish.

Overseas, our powertrain is called the Ioniq 9 Performance, and it produces the fastest zero to 100km/h time of just 5.2 seconds.

Under the bonnet the RX450h+ Sports Luxury runs a plug-in hybrid powertrain that pairs a 2.5-litre four-cylinder petrol engine with a CVT auto and dual electric motors - one on each axle. Together, they produce a total of 227kW of power, though Lexus doesn’t quote a combined torque figure.

Still, it’s quick off the mark for a large SUV, with a 0-100km/h time of 6.5 seconds. There’s more than enough grunt for daily driving and overtaking, even if it doesn’t quite match the outright power of its key PHEV rivals.

The Hyundai Ioniq 9 is essentially sitting atop a massive 110.3kWh battery, which produces a claimed WLTP driving range of 600km.

Be warned, though, the digital dash has a live read out of your minimum and maximum driving range, presumably judged on your driving inputs, and there is a vast gap between the two numbers. In short, if you want to maximise range, go easy on the accelerator.

Its 800V architecture unlocks 233kW DC fast charging, which the brand says will take you from 10 to 80 per cent charged in 24 minutes.

Plugging in at home, though, will be much slower than that – something like 10 hours using 10.5kW wallbox.

The plug-in hybrid system brings solid efficiency, with claimed fuel use of just 1.3L/100km. In real-world conditions (mostly urban driving with regular recharging) I managed a respectable 4.8L/100km, which makes a strong case for the hybrid set-up.

The fuel tank holds 55 litres and it's worth noting Lexus recommends using a minimum of 95 RON unleaded petrol to fill it.

Using our real-world economy figure you can expect a range in excess of 1100km between fills.

The RX450h+ is fitted with a relatively small 18.1kWh lithium-ion battery, supporting an NEDC electric-only range of up to 65km.

While that’s fine for short daily trips, it’s shorter than you'd ideally want in a family SUV of this size and it lags behind rivals like the BMW X5 and Volvo XC90 in this department.

Charging is simple enough. The RX uses a Type 2 charging port and accepts up to 7.0kW on AC power, which means a full charge takes around 7.5 hours, perfect for overnight top-ups. Lexus also includes an at-home charging cable and second adapter cable as standard, which is a thoughtful touch.

It's a proper surprise packet, the Ioniq 9, because you approach it with a pretty good idea of how a big, heavy and equipment-soaked seven-seat SUV is going to behave on a twisting road. Short answer? Not well.

But somehow, through some kind a wizardry, the opposite is true. Rather than feel stupendously big and heavy, the Ioniq 9 shrinks around you, feeling far smaller, more dynamic and more capable than you'd expect.

I'd maybe forgo the tightest of tight switchbacks in favour of more sweeping, undulating bends, but honestly, you can squeeze plenty of fun out of the Ioniq 9 on the right road.

Happily, it's no one-trick pony, either. It's quiet in the cabin, even at freeway speeds, it's comfortable in the city and there's plenty of space and tech on board.

The key take-away here is I like the way Ioniq 9 drives, another big vehicle helped massively by electric motors. Sometimes in big ICE-powered SUVs you can feel just how much work is going into getting them up and moving, but that's not the case here.

Instead, because there are no transmissions or turbochargers to deal with, the Ioniq delivers a rich flow of power and torque every time you push the accelerator. No lag, no whining, it just goes.

But here's the really interesting bit. It almost doesn't matter how good I say this car is, or how well I think it drives, this car will remain a niche seller. And Hyundai's executives seem to know it. And all of that's a shame, because it's really very good on the road, this Ioniq 9.

The RX450h+ delivers power that’s pert and prompt, with genuine bursts of acceleration that make driving fun. It’s always ready to go and there's no lag in stop-start traffic - which gives it a lively, dynamic feel around town.

The transition between petrol and electric power is seamless; you hardly notice the switch, which makes for a smooth, refined driving experience. The cabin is impressively quiet, even on the highway, making long trips comfortable and peaceful.

Regenerative braking isn’t adjustable and is subtle enough that many won’t notice it which is likely a plus for fans of traditional internal combustion engines who are making the PHEV leap.

The adaptive variable suspension adds a sporty edge to handling, letting you confidently take corners at speed. There’s some body roll but the RX never feels top-heavy or unsettled.

The steering carries the weight of the SUV but remains well-balanced and responsive. Overall, it’s a well-tuned machine that’s a pleasure to drive.

Maneuverability is a strong suit, too, thanks to a tight 11.8-metre turning circle and a clear, easy-to-use 360-degree camera system. Parking is easy-as-pie, which a lot of drivers will appreciate.

The RX earned a maximum five-star ANCAP safety rating in 2022, scoring highly across all protection categories: 90 per cent for adult protection, 89 per cent for child protection, 89 per cent for vulnerable road users, and 93 per cent for safety assist systems.

Standard safety gear includes eight airbags (dual front, front side, curtains, front centre, and driver’s knee) plus a comprehensive suite of driver aids. Standout features include emergency call functionality, child detection alert, side exit assist, front and rear collision warnings, park assist and emergency steering assist.

Additional tech covers blind-spot monitoring, driver attention monitoring, tyre pressure monitoring, daytime running lights, LED cornering lights, rear cross-traffic alert, lane departure alert, lane keeping assist, traffic sign recognition, and intelligent seatbelt warnings for the front two rows.

Visibility and parking are enhanced by a 360-degree camera system and front/rear parking sensors, while adaptive cruise control adds comfort on longer drives.

The rear seats have two ISOFIX mounts plus three top tether anchors, accommodating child seats safely. Autonomous emergency braking is active from 5.0 to 80km/h for pedestrians, cyclists, and backover and up to 180 km/h for cars.

Five years with unlimited kilometres is still the underwhelming warranty norm at Hyundai. The battery is covered for eight years or 160,000km.

Happily, servicing is infrequent, with intervals pegged at two years or 30,000km. As a result, the first six years of servicing will cost a total $2005, or an average $334 per year.

The RX comes with a five-year, unlimited-kilometre warranty, which matches its key rivals but isn’t exactly class-leading by today’s standards.

Servicing is handled via a capped-price program, with each service costing $695. The intervals are well spaced at every 12 months or 15,000km, whichever comes first.

This Sports Luxury grade also includes a three-year complimentary 'Lexus Encore' membership, granting access to a handy phone app and member benefits at partners like Westfield and Ampol. On top of that, you get 24/7 roadside assistance for added peace of mind.