Isuzu MU-X vs Subaru Solterra

What's the difference?

The MU-X has always had plenty of appeal as a daily driver – dependable, not dynamic – and it’s a proven 4WD wagon.

Some people don't like the noisy, sluggish engine, but I don't mind it because it delivers off-road.

There was already a lot to like about the seven-seater wagon in terms of its off-road capability, driver-assist tech, standard features, and simple all-round driveability, and the X-Terrain – which encompasses all of that AND adds some polish to the mix – is an impressive top-shelf addition to the MU-X line-up. Even if it's so pricey...

The new Subaru Solterra AWD gets a lot right and is a well-rounded effort in showcasing an electric medium SUV that has passenger comfort, sharp external styling and is easy to drive.

Once you start comparing it to some rivals, it doesn’t always come out ahead of the pack but I still like it for what it is. My seven-year old thinks its fun and very comfortable. He enjoys the easy practicality of getting in and out without any assistance, too.

As I’ve said before, the MU-X has never been particularly exciting or boring in terms of design, just comfortably adopting a low-key, middle-of-the-road type design – sales gold, in other words.

But the X-Terrain has distinctive ‘X’ branding here and there – inside and out – and that adds a subtle class to this variant.

The X-Terrain is 4860mm long (with a 2855mm wheelbase), 1870mm wide (excluding mirrors), 1825mm high and has a listed kerb weight of 2195kg.

It has a wheel track of 1570mm and an 11.6m turning circle. 

Our test vehicle has the exclusive X-Terrain paint – slate grey metallic – which matches well with the X badging, bigger grille design, new headlights, three-tier LED tail-lights, and redesigned wheels.

The interior strikes a stylish note as well with red stitching on the dash, centre console and leather-accented seat trim.

The Solterra has its own vibe compared to the rest of the Subaru family and that’s most likely due to the Toyota partnering.

The tail-lights are sharply pronounced and the many pleats across the body panelling swing more towards Toyota styling than Subaru but it doesn't stick out like a sore thumb.

The heavy-use of black plastic mouldings on our test model's 'Smoked Carbon' paintwork looks okay but it wouldn't do any favours on a lighter colour.

The exterior on the whole looks bold and fun, and I like the fact that it's not pillowy in its shape as some of its rivals are. Those hunting for a sporty-looking EV will find something charming here.

The cabin is different from anything I’ve seen from Subaru so far. Some of it's fun, like the squared off steering wheel which looks rally car-ish but some of it’s odd, like the way the 7.0-inch digital instrument panel has been pushed back towards the windscreen in its own little nook.

The steering wheel can get in the way of viewing the graphics of the instrument panel and its placement looks disjointed from the rest of the dashboard elements.

The black and grey knit-looking cloth upholstery is warm and inviting and is found across the dashboard, seats and some door panels but there is enough cheap-looking black cloth throughout to detract from the general aesthetic. Had the Solterra not been pushing $70K, that wouldn't bother me, but it is, and it does.

The interior is pleasant but the exterior is definitely the highlight of the design.

The interior has a pleasant, familiar and practical feel about it and this is an easy space in which to swiftly become comfortable. 

Controls are easy to locate and operate and charging options are numerous – a mix of USB-A, USB-C and 12V up front, and USB-A for the second row.

Storage places include recesses for your everyday carry gear, a suitably deep 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 cupholders either side of the third row in the MU-X for passengers riding back there.

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

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

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 folded.

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 practicality of the cabin is good for the class and the 212mm ground clearance means it's an easy car to get in and out of.

The extra-wide centre console makes the front look cramped but it isn't. And the the backseat is huge on space. Seriously decent headroom and legroom for the class and the flat floor means middle seaters will be comfortable, too.

Both the front and rear seats are well-cushioned and comfortable. You could easily do a long trip.

The driver's is the only powered seat (it also has lumbar support) but it's great that all but the middle seat feature a heat function for added comfort.

My seven-year old finds the back row comfortable because of its directional air vents and tall seating position providing a good view out of the wide window.

Individual storage is a bit low for the class but it does feature a handy shelf underneath the centre console which is large enough for a small handbag or the manual and logbook... because there is no glove box in this model!

To be fair, most are too small to be of real use outside of storing the 'ahem' manual and logbook.

Each door gets storage pockets and a skinny drink bottle holder and both rows get two cupholders. The rear gets map pockets too but that's it.

The boot features a tyre puncture repair kit, level loading space and 410L of boot capacity with all seats in use. The capacity is a bit lower than its rivals but has been adequate for my grocery run and the odd errand. It's great both Solterra models have a powered tailgate as standard.

The 12.3-inch touchscreen multimedia system looks good and is pulled directly from Toyota so the graphics and accessibility are on-point for everyday use.

You also get built-in satellite navigation which is always handy to have but you miss out on any over-the-air updates or a dedicated Subaru connected services app. 

The rest of the technology is solid with each row getting two USB-C ports and the front also featuring a USB-A socket and 12-volt outlet.

There are two variants for the Solterra range and both come with dual-motored electric powertrains. Our test example is the base model, priced from $69,990, before on-road costs.

Compared to its dual-motored rivals it’s almost as affordable as the Tesla Model Y Long Range priced from $69,900 MSRP, with the Toyota bZ4X AWD at $74,900 MSRP and the Kia EV6 GT-Line almost $20K more expensive at $87,590 MSRP.

However, its rivals sit at higher grade levels and some items on the Solterra AWD, like its cloth seats and manually adjustable front passenger seat, remind you it is still a ‘base’ model. 

That said, the Solterra AWD is well-specified for an entry model with standard features like heated front seats, a heated steering wheel, power-adjustable driver's seat, power-adjustable lumbar support (driver only) and even the rear outboard seats have a heat function.

The technology features a 12.3-inch touchscreen multimedia system, built-in satellite navigation, wireless Apple CarPlay and Android Auto, two fast USB-C ports in each row and a clear 360-degree camera system.

For practicality, it features a powered tailgate, tyre puncture repair kit and remote air-conditioning start (from the key fob) to set your ideal cabin climate before you get in.

The MU-X has a 3.0-litre four-cylinder turbo-diesel engine, producing 140kW and 450Nm and it’s matched to a six-speed auto.

These form part of a proven powertrain and while the MU-X may not be the most dynamic vehicle to drive – it’s acceleration is sluggish rather than punchy – it has a real tractability that nullifies any other niggles.

It has part-time 4WD, with high- and low-range as well as various drive modes, rough terrain mode, and a rear diff lock.

The Solterra AWD has dual electric motors producing a combined 160kW for power and 337Nm of torque. It’s got enough grunt to be fun and zippy, even on the open road, but isn’t as powerful as some of its dual-motored rivals. 

For example, the Kia EV6 GT-Line produces 239kW/605Nm, which looks almost indecent compared to the Solterra's specs.

Official fuel consumption for this MU-X is 8.3L/100km and that's on a combined cycle. 

On this test I recorded 10.2L/100km. I did a lot of high and low-range four-wheel driving, so that fuel consumption is not too shabby.

The MU-X has an 80-litre fuel tank, so going by my on-test fuel consumption figures you could reasonably expect a driving range of about 784km from a full tank. 

The benefit of motors which aren't 'performance' grade means you win out eventually with energy consumption and its here the Solterra AWD shines.

The official combined cycle energy consumption figure is a low 14.1kWh/100km and I averaged 15.2kWh after a week of mostly urban driving.

The consumption is fantastic but the official driving range from the large 71.4kWh lithium-ion battery is only up to 414km (WLTP), which, again, is lower than most of its rivals by a good portion. I would have range anxiety on a longer journey.

The Solterra has a Type 2 CCS charging port which means you can benefit from faster DC charging speeds (up to 150kW on DC power).

On a 150kW DC system you can go from 0-80 per cent in just 30 minutes. 

On a 7.0kW AC power charger, you can go from 0-100 per cent in 9.5-hours and that drops to 6.5 hours on an 11kW system. Which isn’t as fast as it you might like but still makes it worthwhile plugging in while you're frequently the local shops.

In previous tests, the MU-X has been fine on road and more than adequate on gravel, dirt tracks, and during low-range 4WDing. But it’s been a jarring, skippy ride on irregular surfaces rather than as composed as it could – and should – have been. The culprit? Firm suspension, over-inflated tyres, too-tight trousers, who knows?

The good news is it seems like Isuzu has ironed out any issues in the suspension, minor or otherwise, because the MU-X is now is a lot better in terms of ride and handling than ever before. 

Off-road, the MU-X has always been a proven combination of its 3.0-litre, four-cylinder turbo-diesel engine, clever six-speed automatic transmission, and an off-road traction control system that's been increasingly well recalibrated through a number of generations. 

The engine is tractable and gruff, it has plenty of grunt and, as long as you're not driving like a complete hoon, you can usually get through most obstacles without a lot of fuss.

It's this mix of mechanicals and driver-assist tech that make the MU-X such an effective 4WD package. And there are a number of reasons for that. 

For one, that engine delivers plenty of torque down low and in the mid-range torque and that's crucial for four-wheel driving. 

And another thing, Rough Terrain Mode – like a beefed-up and fine-tuned off-road traction control – proves very effective because it punches torque to the wheel with the most traction – while wheel spin on tyres that aren't touching dirt is minimised – and that way it keeps the vehicle moving through obstacles with safe and controlled momentum. 

As I’ve noted before though, Rough Terrain Mode is not a magic all-conquering solution, but it is another handy addition to the MU-X’s off-road toolbox.

And the MU-X also has a rear diff lock to back you up – and that's another valuable component. 

The MU-X has approach, departure and ramp-over angles of 29.2, 26.4 and 23.1 respectively.

A listed 235mm of ground clearance is about standard for this kind of wagon but, as I’ve said before, it seems vulnerable in the underbody, side steps and its plastic mud guards. So the underbody may touch dirt, depending on how challenging the terrain is. 

Wading depth is listed as 800mm.

But, as always, with focused driving, you’ll have lots of fun and you'll minimise any superficial damage or scuff marks to the MU-X.

The MU-X has plenty of potential as a touring platform, but, if you’re planning to do any off-roading beyond well-maintained tracks, then get rid of its road-biased tyres and replace them with all-terrain tyres.

The showroom-standard tyres on this MU-X – 265/50R20 Bridgestone Dueler HTs – are okay, but not really up to scratch if tough 4WDing is what you’re keen to do. I’d prefer an 18-inch wheel and tyre package with decent all-terrains.

The MU-X has a full-sized underslung spare and in terms of packability, the MU-X X-Terrain has a listed payload of 605kg, GVM is 2800kg and GCM is 5900kg.

If you are considering using your MUX as a tow vehicle, it's handy to know that it can legally tow 750kg (unbraked) and 3500kg (braked), which is the standard for large four-wheel-drive wagons. 

Be aware though that, as with any other vehicles, once you're towing anywhere near the maximum weight, your payload is greatly reduced.

The Solterra underlines in bold everything you would expect from a Subaru. The power delivery is well balanced, it grips the road and the handling is comfortable.

Even when cornering there’s not a lot of passenger movement and the steering is on the right side of firm. Manoeuvring is nimble and fun thanks to an the 11.2-metre turning circle that also makes it easy to park.

The 360-degree camera system is top notch and you get great visibility out of the windows. Being only 4690mm in length and 1650mm tall even the smallest city carparks shouldn't daunt you.

The ride comfort is very good with suspension that absorbs the bumps well enough that they don’t bother you. There is a little road noise but not enough to annoy and overall the ride is refined.

The Solterra comes with great standard safety features like forward collision warning, blind-spot monitoring, driver attention alert, safe exit warning, LED DRLs, rear cross-traffic alert, lane-departure alert and keeping aid, adaptive cruise control, traffic sign recognition, front and rear parking sensors and a clear 360-degree camera system.

It also features a digital rearview mirror, which is handy when you have a carload of passengers or gear. While you're aware of all of the safety items none of them are intrusive, which is awesome.

The Solterra has seven airbags, including a front centre airbag and a maximum five-star ANCAP safety rating from testing done in 2022. Its twin, the Toyota bZ4X was the tested model.

The Solterra has AEB which is operational from 5.0-80km/h for pedestrian and cyclist detection and up to 180km/h for cars.

There are ISOFIX child-seat mounts on the rear outboard seats and three top-tether anchor points across the second row.

Two child seats will fit best and I had no trouble fitting my monster booster seat.

The MU-X has a six-year/150,000km warranty and seven years of roadside assistance. That warranty is okay in terms of years, but unlimited kilometres 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 24MY and later vehicle models (up to five years/75,000km, whichever occurs first) – at a cost of $469 for each service.

The Solterra comes with a usual warranty term of five-years/unlimited km and the battery is covered by an eight-year or up to 160,000km warranty term.

However, one of the best things about the Solterra has to be the free servicing (yes, you read that right) for five years or up to 75,000km.

Servicing intervals are more in line with a fuel-based car at every 12 months or 15,000km. But, hey, free is free!