Lexus NX300H vs Lexus IS300H

What's the difference?

The all-new NX is a massive step forward over its popular predecessor.

In every way, it is an improvement, with better refinement, comfort, performance, efficiency, safety and choice.

Indeed, look out, Audi, BMW, Mercedes and Volvo: the NX has finally come of age. If we were in the market for a luxury medium-sized SUV, we'd definitely have the Lexus on our shortlist, especially the incredibly efficient hybrids.

Europe, you've been warned.

Smooth, cosy, quiet, the IS looks and feels better than ever, but without a doubt this hybrid version is a car best suited to cruising the dense metropolis of Chiba at midnight more than it is carving up a bunch of S-bends in the Australian countryside on the weekend.

While that might still limit its appeal for fans of German sports luxury sedans and place it further from the original IS’s ambitions, it does offer an intriguing efficiency and luxury focused alternative, without the compromises brought by rivals with more sporting intent. In a way then, the IS 300h perhaps inadvertently best embodies what Lexus is as a brand.

UX, NX, RX, LX, RZ... Lexus' nonsensical naming strategy can be quite flummoxing.

Just remember that the NX sits above the smaller UX but below the larger RX in the brand's burgeoning SUV stable. It's also closely related to the wildly-popular Toyota RAV4 – though you'd never know by looking at them side-by-side.

At first it may look much like the old model, but the new NX has switched to the latest RAV4's advanced Toyota New Global Architecture, known as GA-K in Lexus' lexicon.

Basically, it allows for a vehicle that's between 20 and 30 mm larger than before, to help improve overall proportions. And with this considerably bigger canvas to work on, it also means that Lexus's stylists have had more freedom to evolve the brand's design language. Albeit at a glacial pace from an exterior point of view.

Starting from the front, the controversial 'spindle' grille has been toned down a bit and the headlights have a neat Lexus 'lightning rod' tick motif, while – looking at the side profile – a startlingly cab-backward shape gives it a surprisingly sleek silhouette.

The extra length and stretched wheelbase let the design to breathe more than before, bringing with it a more graceful and elegant aesthetic.

Finally – and this is a brand first – the new NX's rather nondescript rear has 'LEXUS' spelled out in letters, with no sign of the company logo.

Look closely and quite a lot has changed. This is really a story of doing a facelift right. Lexus has kept all the great-looking bits of the car that launched in 2013, like its striking side profile and angular accents, while dumping most of its least popular elements like the spidery front light-clusters and busy front splitter, in favour of something more refined and conservative.

It even adds some new flair in the rear three-quarter, with dramatic LED light-clusters working their way into a trendy highlight strip across the boot lid.

These changes all add up for a much tougher, sportier, and nuanced design compared to the outgoing car. One that manages to make an eight-year old design look as contemporary as ever.

I even liked our test car in its plain black shade, although I'm less sure about those conservative-to-a-fault, almost Camry-esque alloy wheels.

On the inside, sadly not a whole lot has changed. The busy design looked dated when this generation of IS launched in 2013, and it still looks dated now.

The visual assault of buttons, toggles, displays, textures, and trims is a lot to take in, and makes the cabin feel smaller than it is.

It probably didn’t help the sensory overload of this car’s interior as I hopped out of the stripped-back interior in the Tesla Model 3 I had the week before.

My less-than-impressed brother, a student of design, described the IS’s interior best when he told me “It’s a bit maximalist, don’t you think?”

If nothing else, at least Lexus hasn’t blatantly imitated anyone else when it comes to its interior, but the brand remains firm on dorky design items like the laptop touchpad, redundant drive-select dial, and odd vacant panels under the climate unit which do it no favours.

A welcome upgrade for the 2021 model year is the new media screen, a highlight piece perched atop the dash. It’s bright, has excellent contrast, and doesn’t seem to fall victim to glare.

The Apple CarPlay support I used was seamless and sharp and made the most of the available real-estate in its widescreen layout.

I somehow didn’t mind that the instrument cluster in this base car is analog. It almost suits the IS’s character better than a digital set-up would. Also offered is a small information display between the dials which I used for monitoring the hybrid drive.

A final note on the IS’s design. The fit and finish is quality, inside and out. It leaves you with an impression that this is an immaculately built vehicle, one that should be a must for all luxury cars, and always a strong point for Lexus.

For the really big design step-change, you'll need to step inside...

Hallelujah! Lexus has finally forsaken its weird, futuristic dash design elements for a simpler and far-more intuitive look that finally banishes unnecessary complication while still appearing progressive.

Somehow, there are now 33 fewer switches than before, aided by permanent virtual short-cut buttons on both of the touchscreens on offer.

Lexus has clearly been listening!

So, now, what we have here is an attractive, functional and superbly built interior (save for a couple of very-atypical Lexus rattles in these early production cars we drove), boasting quality materials that rate highly on all the important sensory metrics: lush to the touch, easy on the eyes and lovely to breathe in... and breathe out again!

Other plus points include a gorgeous steering wheel, attractive instrument dials, endless storage and climate control that's so effective it pretty much creates a microclimate within your personal space.

Brilliant seats, with ample adjustability, provide comfort and support even after hours ensconced within them, while the driving position is enhanced by thoughtful placement of most major controls - including the natty little gear lever and big old paddle shifters.

It's also worth pointing out a couple of surprise-and-delight features – starting with the 'e-latch' electric door handles, with sensors that delay opening if there are cyclists or pedestrians on approach to prevent striking them, as well as a manual override should the battery go flat.

There's more, like the wireless phone charger tray that also slides to reveal a hidden cubby area; centre-console lid that opens sideways FROM BOTH DIRECTIONS – what sort of sorcery is this?? – and optional digital rear-view mirror that works like X-ray vision in seeing through obstructions... handy for when back-seat passengers' beehives block the back view out.

However, after lavishing such intricate attention to detail, why does the instrument cluster's digital trip computer use the same cheap style and font as found in a lowly Yaris? It takes you completely out of the Lexus state-of-mind.

And, like me, you might lose your mind with the infuriatingly fiddly capacitive touch controls on models with the HUD. While it does provide a broad range of functionality that's displayed on the windscreen view, it's difficult to modulate accurately, and doesn't operate intuitively. Remnants of the fiddly old touchpad from the previous NX. Why can't Lexus just abandon such needless complexity? After a while I worked it out – but it's deeply distracting to use.

Oh well. At least the rear seat area is an improvement over the old NX, with more space, comfort and convenience features. Entry/egress is easy, with wide apertures that ought to make fitting in child seats less of a chore than before.

Most adults should find sufficient leg, knee, shoulder and head room back there, though a trio of adults might result in a very tight fit.

Rear facing air vents (with climate control functionality on higher grades), 12V power outlets, twin USB ports and a wide centre armrest with cupholders are included.

Further back, there's a handy (though not class-leading) 520 litres of luggage space regardless of powertrain, expanding to 1411L when the rear backrests are folded. Access is easy thanks to the wide door and flat floor, where a bit of extra storage and even space for the cargo blind are provided. Thanks, Lexus.

Note, though, that runflat tyres take the place of any spare wheel – a bummer if you're out on deserted country road late at night with no help in sight.

Well, the IS is a sedan, so it doesn’t quite have that high-riding appeal of an SUV, and for this update it has even leaned further into its low-slung proportions with a roofline that descends a further 15mm and a boot lid which is 31mm lower overall.

As with the previous car, the interior is quite closed-in thanks to that busy dash design and large centre console. Rather than feeling claustrophobic though, it is best described as cosy, with lots of plush finishes throughout the doors and centre stack befitting a luxury nameplate.

Adjustability is great for the front two occupants and there are two large bottle holders between the seats, a large but shallow console box under the armrest, bottle holders with adjoining bins in the doors, and a smallish glove box.

That’s about where storage ends though, with no extra trays or bins in front of the oddly placed shifter, just an awkwardly finished plastic panel where it feels like a little tray or storage cutaway should be.

The touchpad for operating the media screen joins an unnecessary drive-select cluster in eating up centre console space where there could be more storage.

The rear seat is quite limited on space despite being lavishly trimmed. I fit behind my own (182cm/6'0") driving position with little knee or headroom to spare.

Again, it’s cosy and very comfortable, but if you're taller or wider than me you may run into issues.

The centre rear seat is all but useless for adults, with the IS’s rear-drive architecture necessitating a huge transmission tunnel that almost comes as high as the seat base itself.

Storage is limited to pockets on the back of the front seats, small bins in the doors that double as handholds, and a drop-down armrest with two bottle holders.

There are no power outlets for rear passengers, but there are dual adjustable air vents.

Boot space is 450L which is a little small for the class. It’s impressive the hybrid only managed to lose 30 litres compared to petrol-only IS variants, though, so best to count your blessings.

The largest CarsGuide travel case easily fit in the wide but short available space.

To be precise the variant we’re looking at here is the IS 300h Luxury. It’s the base IS trim with the hybrid powertrain and it wears a before on-road costs (MSRP) of $64,500.

Base car or not, the new IS is very well specified. Now standard are 18-inch alloys (up from 17s), full LED headlight clusters, eight-way power adjustable front seats, dual-zone climate control, 10-speaker audio system, and importantly a brilliant new 10.3-inch multimedia screen with widescreen Apple CarPlay, Android Auto, built-in navigation, and DAB+ digital radio support.

Keyless entry and push-start ignition also continue to be offered, as well as a leather-look interior trim which in our car was in a rather contrasting 'Ochre' colour option.

Our IS 300h was also fitted with the creatively named ‘Enhancement Pack 1’ which adds an openable moonroof for $2000. The significantly more expensive ‘Enhancement Pack 2’ ($5500) adds the moonroof alongside 19-inch alloys, upgraded LED headlights, interior ornamentation, scuff plates, a panoramic reversing camera, 17-speaker premium audio, ‘leather-accented’ interior trim, ventilated front seats, and an electric rear sunshade.

These packs are seemingly largely unnecessary but are also very cheap for a brand at the premium end of the market.

Lexus has made pretty much all of its high-end active safety equipment standard on this base ‘Luxury’ for 2021, alongside some previously unavailable tech which we’ll take a look at in the safety section of this review.

At this price the Lexus IS 300h goes into battle against the Mercedes-Benz C 200 ($66,900), BMW 320i ($70,900), Audi A4 35 TFSI ($55,900), and the ever-looming threat of Hyundai’s Genesis, which offers its similarly-sized G70 in base form at $59,300.

Some of these base-spec rivals are cheaper, some are more expensive, but did you notice none of them are hybrids?

Access to Toyota’s affordable and popular hybrid drive is a real point of difference for the Lexus brand, and we expect it’s a key drawcard for the loyal customer base. More on that later.

Here is where the NX shines, with clear options that provide very obvious benefits according to wants, needs and budgets. And there are even fundamental differences compared to the RAV4 powertrain, further justifying that premium 'L' badge experience.

Let's divide these into petrol and petrol-electric hybrid models, with petrols first.

The NX 250 is powered by a 2487cc 2.5-litre naturally aspirated direct-injection twin-cam four-cylinder engine, producing a healthy 152kW of power at a heady 6600rpm, and 243Nm of torque from 4000rpm to 5000rpm.

Drive is sent to the front wheels only, via an eight-speed torque-converter automatic. Tipping the scales at 1705kg, it's the lightest NX on offer, and thus delivers 89.1kW per tonne.

The NX 350 turbo version, meanwhile, uses a somewhat different four-cylinder engine as well as a variation of the eight-speed auto. A 2393cc 2.4-litre turbo unit, it pumps out 205kW at 6000rpm and 430Nm from a low 1700-3600rpm. It's also AWD only, which adds kilos. That said, coming in at 1860kg, its power-to-weight ratio is a stirring 110.2kW/tonne.

Moving to the series/parallel hybrids, both the expected-bestselling NX 350h and the intriguing new NX 450h+ PHEV are based on that 2487cc 2.5-litre four-cylinder atmo unit, tuned this time to offer 140kW and 136kW (at 6000rpm) and 239Nm/227Nm (from 4300-4500rpm and 3200-3700rpm) in the NX 350h and NX 450h+ respectively.

The NX 350h uses either a single synchronous permanent magnet 134kW/270Nm electric motor in the front-drive version, or two electric motors (adding a 40kW/121Nm generator on the rear, double wishbone axle) to create the AWD alternative. Their combined total power rating is 179kW. The NX 450h+ ups that to 227kW.

None are light, however. While the NX 350h 2WD weighs a reasonable 1810kg, the twin-motor AWD system bumps that up to 1870kg, while the NX 450h+ is a portly 2050kg. Result? The power-to-weight ratio for all three are 98.9kW/tonne, 95.7kW/tonne and 110.7kW/tonne – almost identical to that of the NX 350 turbo.

The hybrids' gearbox in question is an 'e-CVT' electronic continuously variable transmission, working with a lithium-ion high-voltage battery, while the NX 450h+'s EV drive's battery is an 18.1kWh unit.

So, no prizes for guessing which one is the most frugal...

The IS 300h does stand out from the luxury sedan crowd by offering a hybrid drivetrain at a reasonable price. Some rivals offer plug-in options further up the price scale cementing them as a niche option, but the beauty of this Lexus is its very mild $3000 price jump over the base petrol car.

The base car’s 2.0-litre turbo is dumped in favour of a 2.5-litre non-turbo Atkinson-cycle four-cylinder hybrid set-up similar to the one proving popular in the Toyota Camry and RAV4.

The petrol engine produces 133kW/221Nm on its own, and the electric motor produces 105kW/300Nm. Toyota says the “combined system output” of this is 164kW.

Either way, that's less than the base 2.0 turbo. The 300h also swaps out an eight-speed torque converter automatic in favour of a continuously variable transmission. Rare in a rear-wheel drive car.

All NXs require 95 RON premium unleaded petrol, and are emissions rated at Euro6b.

Not surprisingly, on the official combined run, thirstiest of the lot is the NX 350 turbo at 8.1L/100km (for a carbon dioxide emissions rating of 185 grams per kilometre), followed by the NX 250 at 6.9L/100km (158g/km).

The NX 350h cut that down to 5.0L/100km (113g/km for the FWD and 114g/km for AWD), while the NX 450h+, naturally, is the most economical by far, slashing that down to just 1.3L/100km, or 29g/km.

While we can't tell you what the NX 450h+ managed on test, the others didn't quite match their official numbers. Over several hundred kilometres, the NX 350 ranged from 9.3-11.3L/100km, the NX 250 7.5-9.3L/100km and the NX 350h from 5.7-6.8L/100km.

Note that the NX 450h+'s 18.1kW battery can only be charged using an AC outlet, meaning it'll need about 2.5hr to get the job done. Its EV-only range is about 70km on the WLTP score, or 87km using the less-realistic NEDC method.

At 55 litres, the fuel tank will allow the following combined average range between refills: 679km (NX 350 turbo), 797km (NX 250), 1100km (NX 350h) and a barely believable 4231km (NX 450h+, naturally).

As you might hope this hybrid IS has an astoundingly low official/combined fuel consumption rating of 5.1L/100km.

I was pleased to find that after a week of mainly urban driving conditions, our IS was returning a figure of 6.9L/100km. Not bad at all, especially for a class where fuel consumption can get a little out of hand with turbocharged engines or V6s.

Of course, using the hybrid system to your advantage over the long term will get this number much lower, as I discovered on my long-term test of the Toyota Corolla hybrid which essentially uses a smaller version of the same system.

Certainly, if fuel consumption is a high concern, you’re better off with this car than the top-spec V6 (IS 350) which will easily see consumption enter double digits.

Lexus recommends a minimum RON rating of 95 for the IS 300h, and the fuel tank is 66 litres regardless of variant, giving the hybrid an impressive theoretical range of around 1000km.

The previous NX looked better than it drove.

Based on the previous-gen RAV4, it failed to rise above such humble underpinnings, despite all the extra design, comfort and equipment features Lexus created to help it do just that.

Sure, there were some very appealing things going on, including attractive styling, an intriguing interior, sumptuous seats and lots of kit to play with, but the Toyota's noisy, fidgety and tiring DNA soon became apparent, especially compared to rival luxury midsizers. And some of the dashboard multimedia controls were just down-right madness.

Building on the latest RAV4's set of modern, competent components, however, has fundamentally changed the NX.

For starters, it's much quieter inside. Whether at idle, travelling at speed, or traversing some pretty rough patches of road, the NX at last rides like something you'd expect a Lexus should. And given how noisy and droney most of its European rivals also are on Aussie bitumen, it gives the Japanese contender a handy head-start.

The same applies to how enveloping the soft yet supportive seats are, how settled the suspension feels and how calm the experience is. No previous Lexus SUV has seemed so... refined. Even the really big, expensive ones.

From the driver's point of view, the steering is beautifully balanced, for precise yet reassuring control at speed. This varies according to which grade you're driving, but as a whole, while not sporty like a BMW's nor as fluid as, say, a Mazda CX-5's helm, the Lexus walks that line between easy and involving quite well.

Ditto the handling and roadholding. The lightest of the bunch – the petrol-powered NX 250 and NX 350 turbo – feel ripe and ready for a hustle along a curvy ribbon of road, coming across as taut enough for tight turns yet supple enough to soak up the many bumps and thumps thrown up at them.

Switching to the NX 350h hybrid, there's a greater sense of mass, whether driving the front-drive 2WD or even heavier AWD version. As such, it's still quite dynamic, but not as athletic as the petrol-only models.

In terms of performance, there are no duds – and that's no surprise, as the previous NX's powertrains were pretty sound as well.

Though simply a front-drive version of the RAV4 Edge's 2.5-litre unit, the NX 250 seems more muted than the Toyota's application, and yet is willing to rev hard to hit the power band necessary for it to feel alive. At higher speeds, sometimes the raspy engine can sound a tad noisy when extended, but it's never harsh or rough.

Moving on to the NX 350h, it feels like, well, a heavier and quieter RAV4, not unexpectedly. Silent at take-off speeds, the engine chimes in fairly unobtrusively, providing plenty of oomph along the way, while the CVT seamlessly slices through each (artificial) ratios. After the petrol versions, the steering does seem a little more remote, and you can feel the extra heft through turns, but – again – the basics underneath seem right.

Accelerating hard on the open road does reveal that typical Toyota hybrid engine roar and CVT flair, but only when the throttle is prodded hard. Driven normally, the NX 350h is as smooth, swift and sweet as you'd expect. And definitely in keeping with brand performance expectations.

Finally, there's the NX 450h+ F Sport. At over two tonnes, Toyota and Lexus' plug-in hybrid debutante is not a flyweight by any means, yet having all that extra low-down mass does result in a slightly different driving experience.

Take acceleration: having access to 227kW of power and torque together at very low revs equals lots of thrust right from the get-go. And while it's not sports-SUV rapid, there's certainly enough punch to justify the F Sport badge. Similarly, the low centre of gravity that the 18.1kWh battery pack provides seems to promote hunkered-down road-holding attitude through tight turns, with minimal body roll.

Regardless of which NX you're looking at, quibbles are few. Occasional road and tyre roar are still a little evident over some surfaces; the adaptive cruise control and lane-keep technologies could benefit from some local fine-tuning so they behave a little more nuanced in Australian conditions (and that applies to most luxury SUVs nowadays); and the optional head-up display's capacitive controls located on the steering wheel spokes are distracting, difficult to modulate and needlessly complicated. They're so annoying we'd even untick the Sport Luxury option box to avoid it.

If we had to choose a favourite among the new NXs, it would probably be the NX 350h F Sport, since its adaptive sports chassis provides the best compromise between agility and suppleness; the NX 350 turbo is probably the most fun to drive hard and fast, while the base NX 250 is thoroughly competent and sufficiently luxurious to scare most rivals.

Could this really be a medium-sized Lexus SUV we're talking about?

We're not saying that the latest NX is perfect, but it now provides a very compelling argument not to buy European.

There is no doubt the IS 300h is capable. You can feel it through the car’s solid rear-drive underpinnings, silky smooth steering, and reactive chassis.

What this car doesn’t offer is excitement in quite the same sense as many of its rivals. That’s down to this hybrid’s drivetrain. It just doesn’t have that powerful follow-through in the same way turbocharged BMWs or Audis or Mercedes do.

If it’s that 'sports luxury' experience you’re seeking better off looking to the base 2.0-litre turbo or the V6 and their eight-speed automatics.

The 300h does offer something a bit different. The gentle refined efficiency of Toyota’s signature hybrid system in a luxury rear-drive package that’s smaller than this car’s ES bigger brother.

While it may feel capable thanks to the lighter suspension components and altered track that the brand has committed to for this update, the hybrid drive matches this car’s softer character brought about by its gentle suspension tune and light steering.

This is an easy car to drive around a city, it filters out bumps nicely, while offering near silence in the cabin and breezy steering for every day scenarios like manoeuvring in tight parking lots.

The CVT auto and instantaneous torque available from the electric motor make it best at traffic speeds, being both reactive and predictable, with silent acceleration when inching forward at the lights or cruising along at 50km/h.

As you might expect though, the wheezy Atkinson cycle engine and CVT conspire for a noisy and less than engaging experience under heavy acceleration.

It’s not as though you’re rewarded with particular vigour either, with this combination being a bit sluggish when a lot is asked of it.

It loses its reactivity and refinement at higher speeds or in the corners on country roads as the transmission elastically tries to keep up with the demands of the driver.

Still, few luxury sedans are quite as purpose-built for the toils of a city, and if you want to get drawn into this car’s hybrid drive antics, it’s easy to make a game out of saving fuel by trying to rely on its low-speed electric motor capability.

Really then, it leans into its urban luxury appeal. A luxury sedan for the streets of Tokyo. An ideal car in this class for the urban environment.

If you don’t care for the thrill of a turbocharger or frequently seek to explore the twists of your nearest B-road, you could do worse than the comfort and ambiance the 300h offers.

A full active safety suite is now standard across the IS range, including freeway-speed auto emergency braking with pedestrian detection (works during the day and at night) and cyclist detection (works during the day only), and a new intersection braking feature, lane keep assist with lane departure warning, blind spot monitoring, rear cross traffic alert with reverse auto braking, traffic sign recognition, adaptive cruise control, and auto high-beam assist.

There is also an auto SOS function, as recently added to the Toyota Yaris Cross, which automatically triggers if an airbag is deployed. On the topic of airbags, every IS has a thorough suite of 10 (dual front, dual side, quad head, dual front knee).

This all adds up with the standard array of stability, brake, and traction controls for a maximum five-star ANCAP safety rating, although the IS was last assessed way back in 2016.

The IS is built in Japan.

Lexus now offers a five-year, unlimited kilometre warranty with roadside assistance.

Furthermore, NX 350h hybrid and NX 450h+ plug-in hybrid models also feature a 10-year, unlimited kilometre battery warranty.

Service intervals are at 12 months or 15,000km, whichever comes first.

The NX also includes three years and 45,000km of capped-price servicing, with each one costing owners just $495 – and that's highly competitive pricing for a luxury brand.

Plus, there's also Lexus' 'Encore' aftersales subscription program offering myriad offers and services.

Lexus gets slightly ahead of the luxury pack with an extra year of warranty. While BMW and Audi still sit on three, Lexus offers four, but it is limited to 100,000km and is still outdone by Mercedes-Benz and Korean newcomer, Genesis, offering five-year/unlimited kilometre promises.

The IS has capped price servicing fixed at $495 for the first three years of ownership with roadside assist, and the brand will even pick up and drop off your car, or offer a free loan car during every 12 month or 15,000km service.

It’s worth noting that German rivals offer pre-paid service packages out to five years, and Genesis is trying to make a splash with free servicing.

Lexus does offer a luxury ownership program dubbed ‘Encore’ which includes invites to experiences and certain partnerships with restaurants and the like to keep potential owners enticed.