Isuzu MU-X vs Rivian R1T

What's the difference?

The MU-X has plenty of appeal as a daily driver – dependable and it’s a proven 4WD wagon.

Does the 2.2-litre engine add anything substantial to the mix?

Well, it's better than the 1.9-litre, that's for sure, and there's a lot to like about this MU-X in terms of its off-road capability, driver-assist tech, standard features and all-round driveability. And, while the LS-T lacks the top-shelf polish of the X-Terrain, it’s still an appealing potential purchase.

But the 3.0-litre option is better because while the 2.2L is very effective off-road and general day-to-day driving, it lacks grunt and has to work that much harder and is that much noisier under load than the 3.0-litre in most driving scenarios, including 4WDing.

Having finally experienced the Rivian R1T from the driver's seat I think this is a ute that would have plenty of appeal in the Australian market. Not as a competitor to a Toyota HiLux Workmate or similar working-class ute, but as an alternative to the likes of the HiLux Rogue, Ford Ranger Raptor or even the new Ranger Platinum.

This is a high-end, luxury ute that also happens to be electric, which only expands its appeal. It has seriously impressive performance and, while we didn't get to test them first-hand, strong off-road credentials. Add to that a premium look and feel to the cabin and loads of practicality and it's easy to see this finding an audience here.

The biggest question will be cost, because even at a direct price conversion (which isn't a clear reflection of shipping and local tariffs) the R1T will start well over $100,000. Even by today's standards of six-figure US utes like the Chevrolet Silverado 1500 and incoming Ford F-150, that will be a hard sell and could restrict its chances.

Which would be a shame because while Tesla has a clear head start in Australia, it's possible for Rivian to follow in its wheel tracks and have plenty of mainstream success.

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

In terms of appearance, the MU-X remains largely unchanged from the most recent iteration. And that’s a good thing. It’s blocky enough to be recognisable but sleek enough to remain inoffensive. Worth noting the door handles, window trims, front fender accents, roof rails, and side steps on the LS-T are gloss black.

Inside, nothing much has changed (other than a newly-introduced idle start/stop button) and, as such, the MU-X retains a low-key familiarity that makes it a comfortable space. Generally, design-wise, the MU-X more than holds its own against the likes of the Toyota LandCruiser Prado and Ford Everest.

There's a lot to say about the design of the R1T. Unlike Tesla, which has gone radical in the design of its Cybertruck, Rivian clearly made a decision not to be too polarising but also leverage the advantages of electrification. The result is a ute that stands out even amid the glut of pick-ups on American roads.

Rivian also opted not to compete directly with the massively popular Ford F-150, Ram 1500 and Chevrolet Silverado in the US, instead sizing the R1T in what's considered the 'compact pick-up' market in the US. That makes it pretty much on par with the likes of the Ford Ranger and Toyota HiLux that we flock to in Australia. The R1T measures 5514mm long, 2077mm wide and 1986mm tall, which compares to 5446mm, 1852mm and 1977mm for the Ranger dual-cab.

Inside, like so many modern cars (and not just EVs), Rivian has opted for a minimalist design aesthetic, running almost every function through the central multimedia touchscreen, with only two physical buttons in the entire cabin, a pair of dials/buttons on the steering wheel and a pair of stalks behind the wheel (left for the indicators and right for the gear selector).

There isn't even a button to alter the power adjustable steering column, instead steering wheel position and mirrors are controlled via the touchscreen and the dials on the wheel. You have to select what function you want and that activates the wheel switches, allowing you to adjust for both reach and height.

It's arguably an unnecessarily complex system for something that should be simple, but for owners that can most likely do it once and then save their preferred position it's ultimately not a big deal; still, would one small button set on the steering column have been that complicated?

As you should expect for the price, the R1T quad-motor has a premium look and feel to its interior. The synthetic leather and dark ash wood make for a luxury car feeling, feeding to that simplistic but very hi-tech and polished design aesthetic.

The interior has a familiar and practical feel about it and the cabin is an easy space in which to become comfortable. Controls are easy to locate and operate and charging options are numerous – a mix of USB-A, USB-C (front and second row) and 12V.

Storage places include recesses for the bits and pieces from your pockets, a deep-ish centre console, as well as dual cupholders up front, cupholders in the rear fold-down centre armrest and bottle holders in the doors. There are also cupholders either side of the third row.

The MU-X has physical-button options to activate some functions (including to switch on the audio system, to adjust volume and access sat nav).

Seats are comfortable and supportive through all three rows – yes, even the third row is roomy enough to prevent whining from whoever is back there.

My camera guru/photographer/sergeant-at-arms, Glen Sullivan, reminded me that the third-row seats don’t have ISOFIX or top-tether points for child seats. Thanks, mate.

The cargo area is 311 litres with all three rows in use, 1119L with the third row flat and 2138L with the second and third rows stowed away.

The rear cargo area has a cargo cover, tie-down points, a 12V power outlet, a storage space under the rear cargo area floor and a space for tools inside the driver’s side rear cargo wall. The MU-X’s full-size spare (bravo!) is attached to its undercarriage.

This is one of the areas that Rivian has excelled at and it makes the R1T a real standout in its class. Because it's a bespoke design there are a number of clever practical features around the cabin.

Starting with the Bluetooth speaker that slides out of the centre console. So you can play your music through the car's speakers or, when you leave the car, take your tunes with you. The sound system is another in-house Rivian set-up, like the multimedia, with the company splitting with original partner, audio specialist, Meridian.

Other clever interior touches include the charging pad (complete with tiny Rivian logo pattern), a sizable centre console box and a torch recessed in the door. There are also a power outlets in the cabin, rather than just USB ports, so you can charge your electronics on the move.

Rivian has also developed a 'Pet Mode' for the cabin, which the company claims allows owners to safely leave their pets in the car. The system allows the air-conditioning to keep running, even while the ignition is off, so your pet doesn't get overheated or freeze, and the media screen displays a message saying that your pet is okay (so no good Samaritan smashes your window to save your animal friend).

The R1T's other major party trick is the 'cargo tunnel' that runs the width of the car, taking advantage of the empty space between the cabin and the tray. This is a unique feature for the R1T, allowing for an extra 331 litres of lockable storage, which can be accessed on both sides or through the cabin via the rear seats.

Rivian even showed off a 'Camp Kitchen' that could slide in and out of the tunnel. This elaborate accessory was designed to make camping easier, featuring an induction cooktop, sink and crockery, but it has since been removed from the company's website as it is reportedly redesigned. Hopefully it's available again by the time the R1T makes it to Australia.

This would work in tandem with the 'Camp Mode' function that lets the ute self-level its suspension so the body is flat on uneven ground and turns off the exterior lights and sounds not to distract others, while still allowing you to use the power outlets in the tray and cargo tunnel.

As for the space in the cabin, it's good in the front and rear. With a 3449mm wheelbase there's generous room for the rear occupants that allows for two adults to sit in comfort, and Rivian claims it's wide enough for three child seats.

As for storage, in addition to the cargo tunnel, there's under bonnet storage measuring 314 litres, so there's plenty of out-of-sight space despite it being a ute.

The tray measures quite square, at 1374mm long and 1297mm wide, but Rivian has designed the tailgate to sit flush with the tray bed, which can extend the usable length to 2131mm.

The tray itself has several handy features. These include multiple power outlets and an air-compressor, so you can add extra pressure to your tyres if you let them down to go off-roading or pump up camping equipment.

Underneath the tray is the housing to keep the spare tyre on the off-road package, but as a spare isn't available on all models as standard, it can be used as storage for wet or dirty items because it's washable and has a drainage hole.

As many of these new car companies have found, including Tesla with its long-gestation periods for the Model 3, Model Y and now Cybertruck, mass-producing motor vehicles isn't an easy task. So, to simplify things and help get its business up and running, Rivian has focused on a single R1T variant for the US market initially.

This is the range-topping quad-motor R1T, with four electric motors (two per axle), which is priced from US$89,000 (approx. A$139,000)

That should give you an idea of where Rivian has positioned the R1T in the US market. This isn't a 'working-class ute'. This is one of the new breed of lifestyle vehicles that have become increasingly popular in the US and Australia.

Rivian has plans for a more affordable dual-motor (one per axle) model, which will start at US$73,000 (approx. A$114,000), and be able to be upgraded with a 'Performance' motor package for US$5000 or the choice of a 'Large' battery for US$6000 (approx. A$9000) or the 'Max' battery for US$16,000 (approx. A$25,000). We'll explain the technical difference between those motors and batteries below.

As for standard equipment, the R1T comes with a 21-inch alloy wheel and 'road' tyre, a built-in air-compressor, 'Gear Guard' security cable (again, we'll explain in-depth later), synthetic leather trim, dark ash wood inlays, heated and ventilated seats and a heated steering wheel.

Notably absent is Apple CarPlay and Android Auto, with Rivian preferring its own bespoke Google-powered system.

There is an 'All-Terrain' package available, too, which swaps out 20-inch alloys with all-terrain tyres, underbody protection and a full-size spare, that's stored under the tray.

Rivian also offers a variety of accessories including MaxTrax recovery boards, first aid kits for humans and pets and an off-road recovery kit that includes straps, hitch link and gloves.

The company has also partnered with Yakima, an American company that specialises in adventure accessories, to offer a roof-mounted tent for the R1S (but doesn't currently offer it on the R1T configurator).

And if that's not enough accessories for you, Rivian sells a huge array of branded merchandise via its website, including shirts, hats, chargers, bike mounts, drink bottles and even pet gear.

This MU-X has a 2.2-litre, four-cylinder, turbo-diesel engine, producing 120kW at 3600rpm and 400Nm between 1600-2400rpm and it’s matched to an eight-speed automatic transmission.

Worth noting the 3.0L MU-X has a six-speed auto and produces 140kW (at 3600rpm) and 450Nm (1600-2600rpm) while the outgoing 1.9L MU-X has a six-speed auto and produces 110kW (3600rpm) and 350Nm (1800-2600rpm).

While the 3.0-litre has always been unstressed in most driving scenarios – even low-range 4WDing – the 2.2-litre feels underpowered. More about that in the ‘Driving’ section below.

The MU-X has a part-time 4WD system which includes a dual-range transfer case (with high- and low-range 4WD) and a rear diff-lock. The driver is able to shift from 2H (two-wheel drive, high-range) to 4H (4WD high-range) while on the move up to speeds of 100km/h. The diff-lock may only be engaged when the vehicle is in 4L (4WD low-range).

The MU-X also has a switchable terrain mode system which tweaks the engine, transmission and traction control to suit the driving conditions. 'Rough Terrain' mode, like a steroids-enhanced off-road traction control, is king of these modes when you’re off the bitumin.

There are three main powertrain options for the R1T - Dual-Motor AWD, Performance Dual-Motor AWD and Quad-Motor AWD.

Even as the entry-level model the Dual-Motor AWD makes 397kW/827Nm and can sprint from 0-60mph (96km/h) in just 4.5 seconds.

The Performance Dual-Motor AWD steps things up to 495kW/1123Nm and a sprint time of 3.5 seconds, while the Quad-Motor makes a very potent 622kW/1231Nm and takes just 3.0 seconds to run 0-60mph.

The Quad-Motor we tested comes standard with eight 'Drive Modes' that adjust the ride height, suspension stiffness, brake regeneration, stability control and torque distribution. The eight modes are - 'Sport', 'Off-Road Drift', 'All Purpose', 'Off-Road Auto', 'Off-Road Rock Crawl', 'Off-Road Rally', 'Conserve' and 'Towing'.

The ability to change torque distribution is the key function, as it allows for a wide variety of driving characteristics. For example, in Sport and Off-Road Drift it can send the majority of the power to just the rear wheels, allowing the R1T to perform like a rear-wheel drive vehicle. While in the Conserve setting it can send power only to the front motors to save energy. Or in the Rock Crawl setting it can send power to individual motors to help climb over obstacles.

Official combined cycle (urban/extra-urban) fuel consumption for this MU-X is 6.7L/100km. The 1.9L MU-X offers 7.4L/100km while the 3.0L offers 7.6L/100km.

Actual fuel consumption on this test was 8.7L/100km.

The MU-X has an 80-litre fuel tank, so, going by that on-test fuel consumption figure, you should be able to get a driving range of about 920km. But remember, your fuel consumption may be completely different to mine because chances are you'll have friends, family pets, sporting equipment, camping gear, the whole kit and caboodle on board. I've only been carrying vehicle recovery gear, MaxTrax, and a first-aid kit, so I haven't had a huge amount of weight on board.

The range of the R1T depends on how much you're willing to spend. The standard battery provides 435km for the Dual-Motor AWD but if you pay for the Large battery that extends to 560km while the Max battery buys you a range up to 640km.

The Performance Dual-Motor comes standard with the Large battery, so it has a range of 560km with the option of 640km with the Max battery.

The Quad-Motor comes equipped with the Large battery as standard and has a 530km range, but it isn't available with the Max battery.

Rivian claims the R1T has a 220kW max charging rate on a DC fast charger. The company is rolling out its own network of charging stations in the US but crucially it also recently signed a deal with Tesla. 

A new 'Magic adapter' is now available so Rivian owners can access Tesla's network of more than 12,000 chargers in the US. Hopefully that deal carries across to the Australian market when Rivian arrives here.

Before we launch into the off-roading section of this test, it’s worth noting the MU-X has always been decent on-road; composed, reasonably refined (for a 4WD wagon, anyway) and comfortable. And thankfully, with the 2.2-litre engine, not all of those characteristics have been thrown out the window.

It is quite noisy, especially under pressure when you have to do some heavy acceleration or when you have a bit of gear on board. When it has to work that bit harder than it usually does, it can become quite noisy. Admittedly, the 3.0-litre MU-X is also quite gruff, but there's an edge to the roughness in the 2.2-litre that is very noticeable on road.

This MU-X is quite sluggish off the mark, exhibiting a disconcerting lag under heavy throttle from a standing-start. And it’s far from the most dynamic vehicle to drive. But it has a tractability about it that manages to mostly negate these flaws.

Otherwise, the new eight-speed auto deserves credit as it’s slick and smooth in application and feels right at home in this wagon.

Now to off-roading. The MU-X is still very capable. In fact, even with the 2.2-litre engine, it remains one of the better-performing 4WD wagons straight out of the dealership, in terms of pure off-road capability.

The 3.0-litre MU-X is not the torquiest in this segment, but it offers ample pulling power available across a wide rev range – count on peak torque between 1600rpm and 2400rpm – and it delivers that pulling power in an even-handed fashion. The 2.2-litre MU-X has to work harder than its stablemate, and it’s noisier and harsher.

However, those characteristics don’t take away from how effective this MU-X is because it offers impressive off-road performance. It still has a decent amount of low- and mid-range torque, which makes dirt-road cruising and low-speed 4WDing easy.

The MU-X has part-time 4WD with high- and low-range 4WD gearing, a rear diff lock and overall it retains all of that off-road capability the 3.0-litre MU-X has been renowned for – so you don't lose any efficacy there.

The line-up’s off-road traction control system, which once was a bit patchy in its effectiveness, has gone through a couple of phases and it’s been recalibrated/tweaked over the years and it is much better now.

Of course, the MU-X also has Isuzu’s much-vaunted Rough Terrain mode (a form of early-acting off-road traction control which converts lost grip into torque for the wheels with grip), and it is smooth and effective, giving the driver better overall control in challenging terrain.

Some of this MU-X’s listed off-road angles appear shallower than the 3.0-litre MU-X’s – approach: 23.9 (3.0L = 29.2), departure: 26.4 (3.0L = 26.4) and ramp-over: 19.6 (3.0L = 23.1) – but, even if that is the case, it has very similar driving characteristics in low-speed, low-range four-wheel driving to its 3.0-litre stablemate.

If you drive with control and consideration, you shouldn't have any trouble tackling light to moderate 4WDing in this MU-X. It could even, if push comes to shove, handle challenges that may be considered by some to be on the edge of hard-core 4WDing – for a showroom-standard 4WD wagon anyway.

Ground clearance is 235mm and wading depth is 800mm, so there’s an adequate amount of clearance to work.

The MU-X – with a turning circle of 11.6m and a kerb weight of 2130kg (3.0L = 2185kg) – feels quite nimble on bush tracks.

This wagon’s wheel travel – how far the axle can move up and down relative to the chassis – has more than an adequate amount of flex, stretching its tyres close, if not all the way, to the dirt.

A noticeable trade-off is its 20-inch wheel-and-tyre combination, which is best suited to sealed surfaces and so are far from ideal for dirt-track touring. There’s an easy remedy, though. Buy a set of decent all-terrain tyres on 17- or 18-inch rims to replace the showroom-standard 265/50R20 Highway-Terrain tyres. If you are using your MU-X, avoid dropping pressures too much because you’ll risk sidewall pinches and punctures on these low-profile road tyres.

In terms of packability: the 2.2L MU-X has a listed payload of 670kg, whereas the 3.0L version offers 615kg.

The 2.2L MU-X can legally tow 750kg (unbraked trailer) and 3500kg (braked), so theoretically you can tow the same load as a 3.0-litre MU-X. But, as mentioned, the 2.2-litre engine feels underpowered, even in general day-to-day driving, so with a load and/or towing that’s an added burden.

For reference, the 2.2L MU-X has a listed gross vehicle mass of 2800kg and gross combined mass of 5900kg.

Like all EVs the R1T manages to combine rapid performance with a whisper-quiet powertrain, but what stands out is how refined the Rivian feels. For a car company's first effort the level of isolation you feel from the outside world is impressive. It doesn't have any of the squeaks, rattles and mechanical groans that plagued some other start-up EV car companies in their early days.

Instead, the R1T feels like a very complete and well resolved package. Like many modern EVs, starting it up is as simple as climbing into the driver's seat, with a sensor immediately preparing the car for you to head on your way without needing to press a 'start/stop' button.

Tap the gear selector stalk down for 'Drive' and you immediately experience the immense torque from Rivian's quad-motor powertrain. Even at suburban speeds you get a sense of the power that lurks beneath the surface of this ute.

Once we found a safe spot to unleash the full potential of the four motors they did not disappoint. It has the kind of sickening acceleration that we've come to expect from electric vehicles, with Rivian's 0-60mph (0-96km/h) claim of just 3.0 seconds feeling completely legitimate.

The regenerative braking is extremely powerful, and that's a pro and a con. That's because there are only two modes - standard and strong - but even in the lower setting there's powerful retardation as soon as you release the accelerator. This is very much an EV that can be driven on one pedal, which is fine, but it does take some getting used to.

A number of carmakers have begun offering much lower levels of regen braking, which allow you to drive more like a conventional internal combustion engine vehicle by using both the accelerator and the brake pedal, so perhaps a lower setting is something Rivian will have to consider in the future.

It also doesn't help that adjusting the regen braking is another function that requires you to dive back into the touchscreen menu, rather than using steering wheel-mounted paddles like other EVs have adopted.

The ride felt quite firm on the streets of Los Angeles, but that's not entirely surprising for what is a very heavy vehicle (it tips that scales at just over 3250kg) that's riding on 21-inch alloy wheels. However, given air suspension is standard across the range, it feels like it could be tweaked to make for a more compliant ride, especially on Australia's choppy roads.

The standard air suspension also allows for a variety of ride heights for improved off-road performance, with R1T able to adapt from as low as 241mm in 'Sport' mode all the way up to 378mm in its 'rock crawl' setting.

The R1T comes fitted with the usual array of airbags and passive safety systems, but Rivian founder Scaringe spent years working on autonomous vehicles as he built up his company so there's an array of active safety features that make the ute semi-autonomous.

Rivian calls this system 'Driver+' and it features all the now-normal active safety items like autonomous emergency braking, adaptive cruise control, lane change assist, lane keeping assist and blind-spot warning. The combination of these systems allows for some mild autonomous functions under the right circumstances.

Another interesting safety feature is called the 'Gear Guard' system. It's a complex system that includes a camera array, an external warning system and a physical cable in the tray.

Rivian calls it a 'family' of technologies but in simple terms it uses five of the pick-up's 11 cameras to monitor the surrounding area and sound an alarm if people are getting too close. If it sets off the alarm, the car will also send you a text message alert so you can check what's happening.

It also includes the Gear Guard cable, which is a braided steel cable with a nylon cover that you can thread through anything - such as a bike or other sporting equipment - and then lock into a connection built into the tray. Again, it uses the cameras to record anyone getting too close so you know who's tried to pinch your stuff.

The system also includes a cute monster mascot that pops up on the media screen to let people know they are being recorded. Plus it gives Rivian something to put on t-shirts to sell on their website.

The MU-X has a six-year/150,000km warranty and seven years of roadside assistance. Unlimited km in the warranty would be welcome.

Service intervals are scheduled for every 12 months or 15,000km, whichever occurs soonest.

Capped price servicing covers the first five scheduled services for MY24 and later vehicle models (up to 5 years/75,000km – whichever occurs first) – at a flat price of $469 for each service.

Isuzu Ute Australia has a nationwide network of more than 160 dealer sites.

In the US Rivian offers a five-year/60,000-mile (approx. 96,000km) warranty for the quad-motor models and a four-year/50,000-mile (approx. 80,000km) warranty for the rest of the range. But the battery and drivetrains are covered for up to eight years.