Lexus NX300H vs Lexus RX350

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.

The RX is a big SUV that doesn't always look, or drive, like one, and – in 500h guise especially – can put a smile on a driver's face, too.

Gone are the cabin quirks and the polarising design elements (well, mostly...), and in their place you'll find a solid, premium-feeling family offering without much in the way of drawbacks.

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

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.

Honestly, the Lexus RX looks far more powerful, and cohesive, in the metal than it does in some photos, and in the right colour (we're fond on the deep black or the copper-rose hues), it looks downright fetching.

That Predator-shaped front-end is massive, but the way the Spindle grille kind of bleeds in the body work at the nose of the vehicle is a neat trick, and the whole design ethos gives the RX a sportier, more modern, and more intimidating, energy from almost every angle.

Perhaps the most clever element though is the wave-like design piece that links the rear window with the boot, somehow managing to shrink almost-five-metre SUV (visually, at least), and leaving the RX looking more sporty than hulking.

The door handles are cool, too. They’re fixed, and you just touch them to open the door, with a similar system used once inside to get out again.

Inside, Lexus has gone for a clean, modern-feeling space, and, thankfully, there isn't a Remote Touch trackpad in sight. Instead, you can choose between two screen sizes – 9.8- or 14.0-inch – which kind of dominate the dash, while the air-con controls are digital and interactive, too.

It must be said, though, some interior treatments feel far more special than others, and while Lexus in Australia isn't spilling on specifics for our market just yet, the top-spec models will almost certainly feel more plush than the cheaper ones.

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.

The entire RX range now rides on Lexus' GA-K platform, which is lighter (-40kg), more rigid, and offers a lower centre of gravity (-15mm) than the model it replaces.

The RX is wider (+25mm to 1920mm), lower (-10mm to 1695mm), but no longer (still 4890mm) than the outgoing model. But Lexus has lengthened the wheelbase (+60mm to 2850mm) to earn some extra backseat space for rear riders.

And it must be said, there is lots of room for backseat riders. Sitting behind my own 175cm driving position I had more than enough knee room, and enough head room, and a general feeling of airy spaciousness.

Elsewhere you get the usual practicality perks, with two cupholders up front, two more in the pull-down seat divider that splits the rear seat, and there are two ISOFIX attachment points in the back seat, too.

Charging is handled by a four USB ports, and depending on the trim/spec balance Lexus in Australia shoots for, you should at least find vents with temp controls for backseat riders, too.

Lexus is yet to confirm the luggage space specs for the new RX, but given it’s only being offered with five seats, and that there’s been no change to the vehicle’s length, you can expect a fair bit of room for bags in its auto-opening boot.

This is an arbitrary seven out of 10, here. Because we don't yet know how many trim levels the new RX will launch in, how much each will cost, or what you'll get for your investment.

What we do know is that the RX will launch with three powertrain options: an all-new turbocharged hybrid, a second, more conventional hybrid, and a turbo-petrol engine. There’s a plug-in hybrid version available overseas, but we ain’t getting it. Or at least, not yet.

In terms of specific trims and equipment levels, you’ll need to wait until closer to the RX’s launch in early 2023 for the full skinny. But you can expect a choice between a 9.8-inch or 14.0-inch central touchscreen with wireless Apple CarPlay and Android Auto, an eLatch door system with fixed handles that unlatch at the push of button inside and out, as well as more high-tech safety kit (thanks to Lexus Safety System 3.0) than you can shake a radar at.

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...

Let’s start with what we’re not getting at launch. Internationally, there's a new plug-in hybrid variant that pairs a 227kW hybrid system with a 18.1kWh lithium-ion battery for an EV driving range of more than 65kms, but fight though Lexus in Australia did, it couldn't secure the model for our market at launch. It wants it though, and badly. So watch this space. 

Instead we get three options, including the RX 350h, which pairs a 2.5-litre petrol engine with Lexus' existing hybrid system to produce a total 180kW and 316Nm. It's paired with a constantly variable transmission and will be offered in two- or all-wheel drive.

There’s also a turbocharged 2.4-litre petrol engine on offer in the RX 350, good for 205kW and 430Nm, and paired with an eight speed automatic and AWD.

But the powertrain I really, really like lives in the RX 500h F Performance, and pairs a 2.4-litre turbocharged petrol engine with an electric motor up front, and a second at the rear axle, for a total of 273kW and 551Nm.

The all-new hybrid system has been designed with turbocharged engines in mind, and features a single electric motor at the front, and a bigger rear motor, with the latter able to provide real driving power to the rear tyres - and contribute to a sprint to 100km/h of just 5.9secs.

Lexus calls it an 'eAxle' motor, and it can deliver some 76kW to the rear tyres. It pairs with a 'DIRECT4' all-wheel drive system which the brand says improves "handling, controllability, and feel."

Fitting, then, that it features on the RX 500h F Performance, which also introduces a new go-fast tier for the Lexus brand (though one you can expect to see more frequently in the near future), and which sits between the existing F Sport and the top-tier, full-fat F models.

The brand says things like bigger brakes, performance components and the highest power outputs will be reserved for the F Performance models. And so it is with the RX 500h F Performance, which welcomes six-piston front brakes, adaptive variable suspension, dynamic rear steering and 21-inch wheels.

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).

Let’s start with the pure-petrol RX 350, which will sip a claimed 8.8 litres per hundred kilometres on the combined cycle, and will demand premium petrol. The RX 350h is more fuel efficient, demanding 6.4 to 6.7 litres per hundred kilometres on the combined cycle.

But the most impressive is the RX 500h, which Lexus says will need 8.2 to 8.5 litres per hundred kilometres — making it more efficient than the petrol-powered RX 350, despite producing an extra 68 kilowatts of power and 121 newton metres of torque.

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.

Right, let’s cut to the chase here. I like the way the all-new RX family drives, pretty much across the board. If that’s all the information you want or need, feel free to check out here and move on to the next sub-heading.

Still here? Ok, then let’s go a little deeper.

None of the powertrains on offer feel under-powered in the RX range, which is a good start, but they all do their jobs a little differently. 

The RX 350 is probably the most familiar, with a traditional automatic and that well-known petrol-powered punch. It’s not the most powerful engine on offer here, but it’s more than enough to get the RX up and moving — but, for mine, it can feel a little thrashy (or like it’s straining a little too hard), when you really start to push it, but such is the price you pay for a four-cylinder engine pushing a large SUV.

Next up is the RX 350h, which Lexus reckons will be the best-selling model in Australia. Lexus and Toyota have been doing hybrid powertrains for some time now, and the system fitted to the new RX is predictably solid-feeling, though it too has its drawbacks – namely that the constantly variable transmission can drone on and on under constant acceleration, and even the commendably insulated cabin can’t block it out completely.

So if this is a Goldilocks’ scenario, then the just right has to be the RX 500h, which blends its powerful powertrain with a traditional-feeling automatic to deliver plenty of performance and a tight, engaging drive experience that makes it feel as though the big SUV is somehow shrinking around you from behind the wheel, courtesy of the best performance kit (brakes, adaptive suspension, etc).

But to be honest, no matter the RX, the thing that really stands out here is its on-road dynamics. The car doesn’t really wobble about, there’s not much in the way of body roll, and it feels tight and confidence inspiring, no matter the model - but especially the rear-wheel-steering equipped 500h.

The RX also does a commendable job of locking the outside world outside of the cabin. Where you want it to be a calm and sedate family hauler, it can be that. But it can also put a smile on your face on the right road, too.

And that, I think, is something to be celebrated. And also not something we’ve come to associate with Lexus over the years. But that’s now beginning to change. Long live F Sport Performance, then.

The Lexus RX welcomes the brand's Lexus Safety System 3.0 setup, which means more high-tech kit than you can shake a radar at.

What appears where on the Australian lineup remains to be seen, but internationally the RX will offer things like Advanced Park, remote parking from your smart phone, Safe Exit Assist that will actually prevent you opening the doors should the cameras detect pedestrians or cyclists, and Pre-Crash Safety, which scans intersections for bikes, people or cars, and activate alarms and the brakes should it sense a collision.

That, and things like Front Cross-Traffic Alert, active cruise, Lane Departure Warning and Lane Tracing Assist, road-sign recognition and Lane Change Assist, should see Lexus shooting for a five-star ANCAP safety rating.

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.

The Lexus family is covered by a five-year, unlimited-kilometre warranty, which is about bang-on in the premium-vehicle space. 

While servicing details are yet to be confirmed, the previous RX required a trip to the service centre every 12 months or 15,000kms, and it will fall under the brand’s capped-price servicing program, and the Lexus Encore program, which offers all sorts of perks to owners.