Lexus GX 550 vs Lexus LX600

What's the difference?

The retro-cool Lexus GX550 Overtrail is a solid mix of understated style, on-road performance and 4WD capability.

It’s suitably refined, luxurious and it’s a comfortable off-roader – and if you’re planning to cross-shop it against the likes of Land Rover Discovery, Toyota LandCruiser 300 or Land Rover Defender it actually compares quite favourably.

But there are some negatives: the Overtrail’s fuel consumption impacts its general appeal as a day-to-day driver, it lacks people-carrying flexibility without that third row of seats and the fact there’s no diesel Overtrail on offer is a real letdown.

Still, there’s no denying this is a worthy contender among the current line-up of large luxury SUVs and it makes a lot of sense.

There's absolutely no doubting the new LX's off-road credentials, nor the fact that it takes luxury SUVs to new heights in the four-seat Ultra Luxury model. Do you need a massaging chair and a foot-stool to get to your camping site? Probably not, but globally, there's a distinct market for that sort of decadence.

Closer to the other end of the LX line-up, however, there's a fair bit of cross-over in price and luxury terms with the Lexus' close cousin, the Toyota LandCruiser 300 Series. That suggests there might be a LandCruiser that will do the same job for a little less money and, if that's the case, then the LX loses a little relevance, particularly the petrol-engined version here in Australia. Until, that is, you take into account buyers for whom the Lexus badge infers the bank-vault solidity and prestige that the brand has worked so hard to establish. Which is another way of saying; it all comes down to where you stand on the politics of envy.

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

The Lexus GX550 Overtrail is 5015mm long (with a 2850mm wheelbase), 2000mm wide, 1935mm high, and it has a kerb weight of 2515kg.

It has a chunky, almost straight up and down, old-school look, and leans heavily into retro cool rather than sleek styling.

A big front grille, bulging wing mirrors (more about those soon), as well as Toyo Open Country all-terrain tyres, wheel arch mouldings, and side steps that are all on the correct side of large, add to this wagon’s overall presence.

The bulky wing mirrors offer only a narrow field of rear vision, which is peculiar given the mirrors’ size and that field of rear vision is also vertically oriented which is even more peculiar.

The Overtrail has black trim highlights, and bridge-type roof rails that top off its sporty look.

Inside, there’s a little more posh-ness going on: most striking of all is the olive green synthetic suede accents and stitching added to the front seats, while the rest of the interior mostly consists of soft-touch surfaces with a smattering of durable plastic.

The interior is low-key classy with great build quality.

Perhaps the most left-field design element is the way the LX can, depending on trim level, be configured in terms of its seating. In the past, we’ve seen plenty of SUVs available with a choice of five- or seven-seat layouts, but the LX is the first time we’ve seen seating choices range from seven- to five- to four-seat layouts. If nothing else, it illustrates the breadth of applications a modern luxury SUV is expected to cover.

Those who use their four-wheel drive SUVs off-road will also note the shift back to six-stud wheel hubs. Toyota’s (and Lexus’) move to five-stud wheels a few years ago suddenly made the vehicle’s wheels incompatible with owner’s existing caravans and trailers.

The new LX has also become a committed subscriber to the engine-downsizing theory of modern vehicle design. While the previous model was available with a 4.5-litre turbo-diesel and a massive 5.7-litre petrol, the new engine capacities of 3.3 litres for the diesel and 3.5 litres for the petrol represent major philosophy changes. Both the new engines are now V6s, rather than the previous V8 layouts.

And to give the new car a James Bond moment, all models bar the entry-level version feature a fingerprint sensor to control the starter button function. Q would be pleased.

This is a Lexus so, of course, the Overtrail’s practicality comes with lashings of prestige.

As mentioned, build quality is impressive, as is overall fit and finish. The olive green synthetic suede front seat accents and stitching are nice subtle touches – it adds nothing in terms of practicality but geez it looks good.

The 14.0-inch multimedia touchscreen system dominates upfront. While setting up wireless Apple CarPlay was easy enough, I had consistent issues with it and needed to repeatedly stab my finger onto the screen in order to work my way through countless menus and sub-menus to actually eventually reach the function I wanted to reach – and that’s far from ideal.

I’ve experienced this in several new-gen vehicles and my tip to you is: while the vehicle is stationary, work out how to use the functions you need/want to use most often, because the operation of some of those functions is counter-intuitive.

The driver also gets a 12.3-inch digital cluster with a variety of vehicular information to keep track of and a head-up display, which is a handy addition but polarised sunnies rob you of that.

There’s also a powered sunroof.

Otherwise, there are plenty of charge points, including a wireless phone charging pad in front of the cooled centre console, six USB-C ports, and 12-volt outlets front and rear, and a 220V outlet in the rear cargo area.

There are also cupholders galore – upfront and in the second-row armrest – and too-small bottle holders in the doors.

And – whoo-whee! – are the seats in here so bloody comfortable! Obviously upfront, ventilated, heated and power-adjustable etc are the pick of the pews, but the second row is no Gulag jail cell either. There’s room enough there for three burly blokes - just.

The Overtrail does not have the third row of seats as the Luxury and Sports Luxury do, but that frees up more space in the rear cargo area. Cargo space is listed as 1063L with all seats in use, and 2000 litres if the back row is folded down.

The rear cargo area has a 220V/100W socket (to run camp lights, fridge etc), a cargo blind, tie-down points and leftovers from the seven-seat layout: cupholders on both sides.

The rear tailgate is powered and lifts to open rather than swings to the side like the previous barndoor-style tailgate. Bonus: you don’t have to open the whole door to gain access to whatever gear you’ve stowed away in the rear cargo area; you can open the glass section only and reach in through there and that’s a very handy feature.

The Overtrail’s full-size spare is mounted to its underbody.

The practicality of each variant of the new LX is dependent entirely on how many people you need to move. The base-model version has seven seats with a two-three-two layout, while the Sport Luxury and F Sport feature five conventional seats in two rows.

The Ultra Luxury’s four individual seats obviously make it the variant of choice for the buyer who doesn’t need the extra seats, but clearly limit its appeal for families. But if luxury is your aim, the rear passenger seat in particular is the one to be in as it can be configured to offer up to a metre of legroom and even features a footrest when the front passenger’s seat is moved all the way forward. Both rear seats are also heated and cooled and reclinable to an angle that NASA has calculated offers the maximum support for the human body.

Vents in the rear seat area allow for an air-shower (of cool air over the passengers) or an air-curtain (a blanket of warm air at shoulder height).

The seven-seat versions have a third row of seats that folds flat into the floor (a major improvement over the old fold-up third row) and the second row folds and tumbles into the footwell. There’s a 220-volt outlet in the luggage compartment, too.

Cargo space is slightly less than the old model, but with second and third row seats folded, the LX has cargo space of up to 1871L.

The single-piece tailgate of the new Lexus won’t win as many friends as the old, split tailgate design which formed an impromptu kitchen bench or covered picnic seat. But the single rubber seal of the new design may be an advantage in keeping dust out on outback roads.

Much has been made of the Toyota LandCruiser’s $90K starting price in LC300 form, so it will come as no surprise to learn the new LX is likewise bold when it comes to the sticker on the windscreen.

The range kicks off in seven-seat form with the entry level LX600 (petrol) and LX500d (diesel) priced at $152,300 and $148,800 respectively. Of course, at these price points, entry-level is a relative term, and the list of standard features is a long one, indeed.

Lexus has gone for a tech-heavy look and feel here, with a 12.3-inch main display, a 7.0-inch lower screen as well as 8.0-inch multi-function display screen and even a colour head-up display for the driver. Lexus’ latest generation multi-media system is used, but may require some familiarisation for some owners.

The entry-level car also gets 20-inch alloy wheels, heated and powered front seats, leather-accented upholstery, a premium 25-speaker stereo system, LED headlights and active height control of the suspension via hydraulically-adjustable dampers.

Lexus has also fitted 'Multi-Terrain Select' and 'Multi-Terrain Monitor 2' to allow for different types of terrain and grip conditions as well as giving the driver a 360-dgeree camera’s-eye view of the track and the vehicle crossing it.

If that’s not enough, Lexus also offers what it calls an 'Enhancement Pack' which adds 22-inch alloy wheels, a sunroof and a kick-sensor tailgate for an extra $5500.

The next step up the LX ladder is the Sports Luxury model with a price-tag of $165,800.

For the extra money, you get a premium leather covering for the seats, and the front seats become heated and ventilated. There’s also a heated steering wheel, a cool box (much appreciated in Australia) a split rear-seat entertainment system and specific trim including timber veneer.

The new F Sport is next and adds not just more equipment but more capacity to the car’s off-road aspirations. That’s down to a Torsen rear differential which is torque-sensing in the way it distributes drive to each rear tyre, as well as performance dampers at each corner.

Dark exterior accents and a mesh grille help justify the F sport’s sticker of $171,800, as do interior touches such as seats with extra bolstering and some aluminium trim accents.

Which brings us to the headline act, the Ultra Luxury, which represents a huge price jump to $210,800. As well as extra equipment such as a rear touchscreen for climate control, wireless device charging, the Ultra Luxury is designed as a vehicle where the owner is more likely to be in the rear seat rather than the driver’s seat.

A strict four-seater, the vehicle has a pair of plush rear bucket seats (Lexus calls them captain’s chairs) which recline a full 48 degrees and feature a massage function. The passenger’s rear seat even runs to an ottoman and the entire cabin is trimmed in plush, quilted leather. Surely, with this layout, Lexus has achieved peak oligarch.

The GX550 Overtrail has a 3.5-litre twin-turbo V6 petrol engine – producing 260kW at 4800-5200rpm and 650Nm at 2000-3600 rpm – and that’s matched to a 10-speed automatic transmission.

This is an impressive combination: smooth, plenty of torque across a wide rev range – punchy off the mark, and refined at highway speeds, always controlled, always comfortable.

The Lexus GX550 Overtrail has full-time 4WD and an electronic rear diff lock.

Its selectable driving modes include Normal, Eco, Comfort, Sport, Sport S and the Overtrail also has 'Adaptive Variable Suspension' and 'Multi-Terrain Select' with drive modes, such as Dirt, Sand, Mud and Snow, designed for off-roading.

While the Toyota LandCruiser 300 Series is a diesel-only proposition, the Lexus LX takes a broader view of what its buyers will want in such a vehicle.

As a result, there’s a choice of petrol or diesel power for the LX range, with both engines covering all variants apart from one. To add weight to the theory that the Ultra Luxury model is for people for whom fuel costs really don’t matter, it’s available only as a petrol vehicle.

The turbo-diesel engine is the 3.3-litre V6 twin-turbo unit we see in the 300 Series. It’s unusual in that it uses hot-side-in technology where the exhaust system and turbochargers live inside the vee of the engine, rather than hanging off each side as is much more common. Lexus claims greater efficiency from this layout with less plumbing between the cylinder head and turbo units as well as a more compact design.

Outputs for the turbo-diesel are 227kW of power, with an impressive 700Nm of torque produced anywhere between 1600 and 2600rpm, which is where the engine will spend most of its operating life.

The petrol engine is also a V6 and also twin-turbocharged. It measures 3.5 litres and, again, features a design that allows a smaller capacity engine to exceed the outputs of the physically larger, previous model. To that extent, it makes 305kW of power and 650Nm of torque; both impressive figures.

There’s only one transmission available on the LX, and that’s a 10-speed conventional automatic. To compliment that rugged, ladder-chassis design, the LX also has a transfer-case with proper off-road gear ratios. This is what gives the vehicle its rock-crawling and river-crossing abilities, while permanent four-wheel drive and the Multi-Terrain Select system mean no-fuss operation.

Fuel consumption is listed as 12.3L/100km and that's on a combined cycle.

On this test I recorded 13.9L/100km but, as I have a penchant for dirty stuff, I was doing a lot of low- and high-range 4WDing so I think that figure is actually pretty decent for a 2.5 tonne vehicle with a V6 petrol engine. That’s okay, but I can see those fuel figures climbing considerably once you load the Overtrail up or you tow something with it: a boat, a camper trailer, or a caravan.

The Overtrail has an 80-litre fuel tank so, going by our on-test fuel figure, you could reasonably expect a driving range of about 575km from a full tank.

Much has been made of the new LandCruiser’s fuel-tank reduction to its new total of 110 litres. The LX follows suit with an 80-litre main tank and 30-litre auxiliary tank, but it’s worth remembering the improved efficiency of the new drivelines will maintain the range to a useful total. The base-model diesel version also misses out of the second tank for an 80-litre total.

Toyota claims a combined figure of 8.9 litres per 100km for the diesel and 12.1 litres for the petrol. On the open road, both variants will get pretty close to those targets (even though they’re a combined urban-highway figure) so the touring range remains useful and better than 1000km for the turbo-diesel with the twin tanks.

The smooth Overtrail driving experience begins before you even push the start button: the Overtrail has big grab handles for each door – and I bloody love a good solid grab handle.

Also, the combination of power-adjustable steering wheel and driver’s seat means you’re able to precisely dial-in your preferred driving position.

On road and at speed on dirt tracks, the Overtrail sits nicely. It has a wide wheel track and long wheelbase, so it retains a controlled and composed posture on sealed and unsealed surfaces. 

Some body-roll does creep in when you throw the Overtrail into a corner hard, but that won’t surprise you if you’ve spent any time at all in a large or upper large 4WD wagon recently and that characteristic is no deal-breaker.

Ride quality is very impressive and the suspension set-up – double wishbone IFS with eKDSS at the front, and four-link live axle with eKDSS at the rear – mostly soaks up any bumps, however, it does skip over some more substantial irregularities in the road/track surface here and there, but that’s mostly ironed out by the Overtrail’s adaptive suspension and you can also simply adjust tyre pressures up or down to suit the terrain.

With its 3.5-litre twin-turbo V6 petrol engine at full go – and harnessed so smoothly through the 10-speed automatic transmission – this Lexus offers plenty of acceleration, plenty of power, and plenty of torque.

It's quiet in the cabin although there’s some wind noise from the massive wing mirrors but that's not a huge deal when the overall vehicle itself is so impressive on-road. 

Once underway, this is an easy-driving 4WD wagon. And off-road, there’s a lot of good news about the Overtrail.

It shares the same platform as the 300 Series LandCruiser and the all-new Prado and it has a lengthy wheelbase (2850mm) and a wide wheel track (1685mm front and 1690mm rear) and that means it drives with impressive composure through most off-road situations, whether it's rumbling along a corrugated dirt track or climbing a rocky hill.

Steering is well weighted and precise and there's plenty of feedback for the driver from the dirt to the steering wheel so you know exactly what's going on. And further to that you have a 360-degree camera system, so you can be exacting about your wheel placement and that maximises your chances of always being in control of the vehicle and minimises the risk of any damage.

This Overtrail has so much mechanical goodness engineered into it and so much driver-assist tech that I didn’t even need to engage the rear diff lock because through its off-road driving modes, – sand, mud, rock, snow – it just delivers the right amount of throttle response, the right amount of traction, and with the 'Electronic Kinetic Dynamic Suspension System' (e-KDSS) ticking away, working almost like a sway bar disconnect, the Overtrail is surefooted more often than not.

e-KDSS (essentially an electronically-controlled active swaybar) adjusts tension on the front and rear sway bars to suit the terrain and driving conditions. It tightens them for better body control at higher speeds on sealed surfaces, and allows for a lot more play in them when you’re off-road for improved wheel articulation through undulating terrain. It helps to get the tyres to the dirt and maintain optimum traction, maintain forward momentum – that's what it does and it does it with little to no stress whatsoever. It doesn’t even have to work hard. 

The Overtrail has decent all-terrain tyres – Toyo Open Country (265/70R18) – and even though they’re not as tough all-round as Light Truck (LT) construction all-terrains, they still provide plenty of grip and that's in a variety of off-road situations, on a variety of surfaces: sand, loose gravel, shale, even rain-soaked mud which can be very slippery and can quickly fill your tyre tread. These tyres are a handy addition to the Overtrail package and on a standard vehicle straight out of the showroom, they’re fine. 

But the news is not all good. 

The Overtrail’s 225mm ground clearance is industry standard for a larger or upper large SUV, but it isn't great for a vehicle that’s intended as an off-road beast.

And the off-road angles, approach (27 degrees) and departure (22) aren't fantastic, and rampover is not listed. Again, those measurements are industry standard for a larger and upper large SUV, but for the Overtrail, a vehicle that is supposedly an adventure machine, ground clearance and off-road angles could be a lot better. Having said that though, the underbody is well protected by some substantial bash-plates. Note: The Overtrail’s full-size spare is mounted to the underbody.

Wading depth is listed as 700mm, which is on par with its rivals.

The big side steps stick out and if you don't drive with real consideration then they'll probably cop a scrape here and there and maybe even a bit of a dent. 

One of the quirks about modern-day, large luxury 4WD wagons, such as the 300 Series, the Land Rover Defender and the Land Rover Discovery, is that the driver-assist tech onboard is so laser-precise that it almost removes the driver from the equation of actually driving. Manoeuvring one of these vehicles off-road can sometimes feel so clinical that you almost feel like you’re a spectator, that the vehicle is in control, not you. 

But what the Overtrail has in its favour is that driving it doesn't have that clinical feel about it. As the driver, you do feel dialled in to the entire experience, even though the mechanicals and tech are so very effective, you do still feel like you’re in control … and that’s how it should be.

Towing capacities are 750kg (unbraked) and 3500kg (braked). Payload is listed as 595kg, which is not a lot once you throw in your kids, dogs, and camping equipment – not to mention anything you might be towing at the time – but that payload figure is about standard for this part of the 4WD wagon market. For reference, a 300 Series LandCruiser's payload, depending on the variant, is between 650kg (VX/Sahara/GR Sport) and 785kg (GX).

The Overtrail’s listed kerb weight is 2515kg, gross vehicle mass (GVM) is 3110kg, and gross combined mass (GCM) is 6610kg.

Lexus surprised us a bit with its choice of test roads for the LX’s launch. As well as some twisty bitumen which might not, on the surface, have seemed the most LX-friendly terrain, the launch also threw in some steep if not otherwise too taxing off-road work.

The steep downhill section highlighted the fact that the LX has probably the best hill-descent control we’ve sampled. Not only is it simple to use with speed variation via the rotary knob that otherwise controls the drive modes, it’s also consistent and doesn’t stumble or lock-up wheels and bang brake calipers intermittently.

The second surprise was how well 2.6 tonnes of luxury off-road SUV handled the winding blacktop. It’s no performance-oriented SUV with its live rear axle and off-road-worthy suspension settings, but it can be hustled along in a pretty tidy manner if you concentrate and keep it flowing.

Beyond that, it was pretty civilised at everything else, too, and although it’s not a compact vehicle by any means, the cameras and sensors ensure that it’s not too much of a brain-teaser to park.

The LX seems to have slightly better noise suppression than the LandCruiser on which it’s based and the diesel version doesn’t seem quite as vocal under load. That said, it’s still very quiet and when rolling along at highway speeds and low engine revs, even the diesel is tomb-like in its silence.

But the petrol is next-level refined. There’s a small degree of engine raspiness when you rev the petrol V6 hard (and you won’t mistake it for a V8) but it’s a sophisticated soundtrack and, at a steady throttle, the petrol LX is even more silent.

The two engines have vastly different torque curves, but the 10-speed transmission is so on top of things that it can tailor its shift-pattern to make the absolute most of whatever torque and power are being produced. You can just feel the transmission holding a gear a little longer when the driver dials up max thrust, but in the interests of getting a heavy vehicle moving swiftly, using a clever transmission is the smart, modern way to do it.

Steering is a fraction light to be completely tactile, but that’s a function of the off-road abilities, and we’re pleased to report that the turning circle is very good given the exterior dimensions and makes tight city work much easier.

The shift paddles are, ironically, likely to be of most benefit when off-road and it’s here that the LX lays the SUV pretenders to waste. With low-ratio gears in the transfer case and that clever 10-speed, the LX will climb up some amazing places. It’s fair to say that, like all good off-roaders, you’ll run out of brave pills before the LX runs out of talent.

And while the suspension does a good job off-road, the live rear-axle and independent front suspension also combine pretty well on the blacktop. There’s some initial thump on pattery bumps that are felt more than heard. But as the bumps get bigger, the LX gets even better at dispatching them.

The variable ride height feels like air-suspension but is actually a clever hydraulic adjustment to the dampers to increase their length and, therefore jack the vehicle up for off-roading. Strangely, the ride seems to become a fraction firmer (and we mean a fraction) as the height cranks up, but most owners will never notice it.

What they will notice is the composure that the LX has in most settings. No, it’s not the fastest or tidiest handling SUV out there, but it’s well beyond good enough. And off-road? Very, very little is likely to touch it.

Lexus’ latest safety innovations have made it on to the new LX, and as well as the now-usual driver aids and passive safety gear, there are fitments such as an autonomous braking system that can identify cyclists in daylight hours and pedestrians any time of the day or night.

There’s also intersection turn-assist which minimizes the chances of a crash when turning across oncoming traffic, as well as emergency steering-assist to help with fast inputs in a crash-avoidance situation.

The adaptive cruise-control now also features curve-speed reduction if the car thinks a corner is being tackled at too high a velocity. Along with that is road-sign recognition, blind-spot monitoring, tyre-pressure monitoring, 10 airbags (12 in the Ultra Luxury) and Multi-Terrain Monitoring which allows for a transparent on-screen outline of the car, allowing the driver to see what’s around and even underneath the vehicle.

The Lexus GX550 Overtrail has a five-year/unlimited-km warranty.

Servicing is scheduled for every six months or 10,000km, whichever occurs soonest, and costs $595 each time for a total of $5950. That schedule is a little too soon for our liking.

Lexus Australia recently upgraded its factory warranty to five years/unlimited kilometres (up from three years). That’s better, but by no means a real advantage over most of its competition.

Capped price servicing is available at $595 per service for the first three years. The catch there is that servicing is every six months or 10,000km, an area in which Lexus trails its main competitors.