Isuzu MU-X VS Holden Trailblazer

These two are evenly matched in terms of drivability and off-road capability.

We spent the lion’s share of our test time off-road but these two vehicles are fine on sealed surfaces; easy to drive (albeit a bit sluggish) and suitably refined (albeit a bit noisy).

Both can feel a tad agricultural to steer about at times but, as I said before, that’s okay and part of the Isuzu charm.

But beyond satisfying any daily-driving requirements these vehicles are impressive 4WDs.

From the engine-and-auto pairing, through to driver-assist tech, physical dimensions and simply general all-round suitability, these two are naturals in most off-road environments.

The D-Max and MU-X have plenty of low- and mid-range torque but both also have quite firm suspension over gravel and dirt tracks at speed, and are rather noisy. Although, if you’ve spent any time in a diesel 4WD the tractable engine’s subdued clatter won’t bother you at all.

But there are some differences between the two in terms of their overall performance off-road.

The D-Max has had, through recent development phases, a recalibrated off-road traction control system that's been improved to be more precise and effective through challenging terrain.

But the D-Max now benefits from the introduction of what Isuzu calls Rough Terrain mode, which operates like a boosted off-road traction control, claimed to kick into action at a point of less wheel-spin than a standard off-road traction control system, transferring torque to the wheels that have the most traction, sooner rather than later. Rough Terrain mode debuted in the MU-X in 2021.

This is not a magic pill by itself, but it’s another handy addition to the D-Max’s already-substantial off-road toolbox that also includes a rear diff-lock.

The D-Max has a greater listed ground clearance (240mm) than the MU-X (235mm) but both vehicles have the same wading depth (800mm). 

The D-Max is somewhat hamstrung by its longer wheelbase (3125mm compared to the MU-X’s 2855mm wheelbase) and it has shallower approach and departure angles (27.3 and 19.0, respectively) than the MU-X (29.2 and 26.4), but its ramp-over angle is greater (not by much) at 23.8 degrees vs 23.1.

The MU-X is more nimble than the D-Max on technically challenging 4WD tracks, with its shorter wheelbase and shorter overall body length (4850mm vs the D-Max’s 5310mm). Its turning circle is 11.4m compared to the D-Max’s 12.5m.

Those factors don’t take anything away from the D-Max’s efficacy off-road, it simply means this ute needs to be driven with more careful consideration than the wagon.

Often, the size and type of standard tyres on a top-shelf 4WD straight out of a showroom are not ideal for 4WDing and should be replaced if off-roading is on the new owner’s agenda anytime soon.

However, the tyres on this D-Max and MU-X – 265/60R18 Bridgestone Dueler 684II HT (Highway-Terrain) tyres on the D-Max and 265/50R20 Bridgestone Dueler HTs on the MU-X – are okay, but not really up to scratch if tough 4WDing is what you’ll be doing.

The D-Max’s 18-inch wheel-and-tyre package is at least a more 4WDing-friendly sizing than the MU-X’s 20-inch combo.

Replace the HT tyres with a decent set of all-terrain tyres and maybe consider getting rid of the standard suspension while you’re at it and switch in an aftermarket lift kit, just for the hell of it.

Both vehicles have full-sized spares and in terms of packability, the D-Max has a listed payload of 930kg, while payload in the MU-X is 620kg.

Both vehicles can legally tow 750kg (unbraked trailer) and 3500kg (braked).

The LTZ is 4887mm long (with a 2845mm wheelbase), 1902mm wide (excl mirrors), and 1846mm high. It has a kerb weight of 2203kg.

Its turning circle is 12m but it feels like more of a cumbersome beast when trying to manoeuvre in the bush or in the city, though not enough so for that characteristic to be any sort of deal-breaker.

The tilt-adjustable, electrically assisted steering lacks any reach-adjustment, which is annoying, but it can still be counted on to deliver a precise feel – light at low speeds, heavier at high speeds – when pushing the Trailblazer along at a fair clip on open roads or in and out of corners.

Acceleration seems livelier now; there is more off-the-mark oomph for take-offs and safe, smooth overtaking, even on long gradual climbs, than before. The torquey engine and six-speed auto – with its smooth changes and gear-holding when appropriate – make for a high-achieving combo.

Ride and handling seem better than in Colorado7 guise although the tweaked suspension – Aussie-tuned coil-spring front and coil-spring live-axle rear – and Bridgestone Dueler H/Ts tyres* may account for some of that. However, we did feel some body-roll while driving along back roads, unlike the last time we were in a Trailblazer LTZ. (*The Trailblazer has a full-sized 18-inch spare.)

The locally tuned suspension is, at times, a bit too firm; when we hit heavy bumps and deep potholes on rough gravel tracks several times, we were unsettled because the Trailblazer’s suspension bashed its way over and through.

NVH levels on open-road bitumen can still tend towards the rougher side of things with diesel engine clatter, tyre roar and wind rush clattering a tune on your ear drums.

We completed a series of emergency braking scenarios – on bitumen and dirt – and the Trailblazer’s disc brakes – 300mm at the front and 318mm at the rear – helped rip us into a controlled stop.

Off-road, we had a ball because the beefy Trailblazer seems a much better fit for gravel-track fast blasts and slow-going bush driving than it does for any jaunts in the stop-start city.

Our drive loop included a decent bit of four-wheel driving – coastal sand, bush tracks peppered with rocks of all shapes and sizes, and shallow mud in a dried-out dam. Drive modes can be switched via the centre console dial between 2H, 4H and 4L; high range modes are actually represented by an ‘up’ arrow on the dial; low range is a ‘down’ arrow. Bonus: the Trailblazer’s 500Nm of torque is readily available from way down low.

The Trailblazer has a limited slip diff, 218mm of ground clearance and a wading depth of 600mm, which was never tested as our usual creek crossings were so bone-dry they were more like puddles. Approach, departure and ramp-over angles are 28, 25, 22 respectively.

Its armoury of off-road tech – auto hill-start assist, hill-descent control and more – make it almost unstoppable, straight out of the showroom, for anything demanded of it on a light- to medium-difficulty adventure weekend.

Its 76-litre fuel tank, however, hinders any claim it has to off-road touring potential.

The Trailblazer has 3000kg towing capacity (braked); 750kg unbraked.

Note: Holden has persisted with a system which, when you open a door, the front windows automatically slide down a bit, an action aimed at reducing air pressure when you close the doors. It remains annoying but we still weren’t annoyed enough to actually bother to check the owner’s manual for a possible hack to switch it off.