BMW 630I vs Kgm Musso

What's the difference?

This isn't a car for everyone's tastes, but if you fit in to the buyer group that just doesn't really know what they want in a luxury car, it could be the perfect fit for your family. The 6 Series GT is a practical large prestige car, albeit one that will likely find very few buyers.

The KGM Musso Advance is a large 4WD ute offering a decent amount of appeal for the price and it makes a lot of sense in XLV form.

It’s generally nice to drive, it’s comfortable and capable for a ute and – as with the Rexton – the Musso is another clear sign that KGM continues to improve its vehicles, albeit incrementally in some cases, in terms of quality and functionality.

There is no denying the 6 Series GT looks better than the old 5 Series GT. It isn't as frumpy, it looks more sporty, and to me it appears to have grown into its identity with more conviction than its predecessor.

That said, I don't necessarily like the look very much - it's a bit like a BMW X6 that has been rounded off a little and lowered down substantially. But I can appreciate some of the finer design aesthetics that it offers up: the frameless windows are a nice touch, and the swooping roofline looks smoother than a duck's back.

Other things like the active grille shutters and the air breathers ahead of the front doors are nice functional touches, and to my eye it lives up to BMW's hope of it looking "smooth but muscular". You can get the 630i with either the M Sport package, like you see here, or the more sedate Luxury Line, which is, well, more luxurious looking.

The M Sport styling and equipment package you see in the images here - with M aero kit and 19-inch wheels (ours had been upgraded to optional 20s) - help out with the athletic look of this very big vehicle.

It's huge in fact. The length of the 630i is 5091mm long, it measures 1902mm wide and sits at 1538mm tall, with a lengthy 3070mm wheelbase.

All that equates to a lot of room in the cabin, and what a sumptuous and delightful place it is to be - leather, wood and plush finishes abound.

The Musso is based on its SUV stablemate, the Rexton. It’s a body-on-frame 4WD ute, available only as a dual-cab, and its appearance is inoffensively pleasant.

Styling changes to the Advance include a black grille, black 18-inch alloy wheels, HID headlights (on short and XLV grades), and rear privacy tint.

It also has a black leather-look interior with black leather-look seats.

The Musso’s interior offers plenty of space for the driver and passengers and is neat and well laid out.

Build quality and fit and finish are impressive with a mix of durable plastic and soft-touch surfaces throughout including a leather steering wheel and leather-look seats in the Advance.

Now, I said before that this is a bit like an X6, but it has heaps better interior space than that SUV.

As soon as you slide into the driver's seat, you feel like your inside a large car. The cabin space is plentiful, and there's an abundance of storage on offer, too: there's a split-lid armrest between the seats, a pair of cupholders, a phone storage nook with wireless charging, and big door pockets with bottle holsters.

In the back you have access to door pockets, a flip-down armrest with cupholders (that middle part of the seat can fold down completely to allow storage of longer items), and there's excellent room on offer. How many seats in the BMW 6 Series GT? Five - like, five full-size seats.

Because the roofline doesn't rake as sharply as a four-door 'coupe', headroom is excellent for adults (even of the 183cm variety, like myself), and legroom and toe room are equally very good. This is bigger in the back than a 5 Series, but maybe not as plush as a 7 Series… so I guess it makes sense numerically for its nomenclature.

Of course you get climate control in the front (and in the rear if you option it), and the materials are excellent. The media screen is tablet-style, proudly displaying 10.25 inches of high-def real estate that is both touch-capacitive and controllable by way of the central rotary controller with touchpad. And get this - you can even use gestures to control certain elements like volume, swiping and changing tracks… but you have to option that.

The fully digital instrument display is bordered by a set of incomplete dial rings, which is just odd. BMW, back yourself - your buyers can handle just having a digital screen in front of them, particularly when it's as good as this one.

This grandiose hatchback's boot is commodious - with the back seats in place it has a huge 610 litres of cargo capacity, which extends to 1800L with the 40/20/40 seats folded down using the quick release levers in the boot area.

There is no spare wheel (the BMW range is fitted with run-flat tyres) but it does have a secondary hidden storage area under the boot floor for hiding items or stowing wet gear, bathers/swimmers or muddy clothes.

For context, the X6 has 580L seats up, 1525L seats down.

There is the expected array of storage spots (glove box, door pockets etc), cupholders (two to the rear of the auto shifter) and charge points (two USB-C ports and a 12-volt plug point for driver and front passenger).

The seats are comfortable and supportive and, in general, KGM has maximised space in the cabin, yielding plenty of shoulder and legroom for driver and passengers.

The 12.3-inch touchscreen multimedia system works reasonably well although you do have to cycle through numerous menus and sub-menus to change some settings and I did have to try several times to pair my phone to it, so overall functionality is clunky.

Rear-seat passengers have access to directional air vents, but there are smart-device charge points.

The tub size is as follows: 1600mm long in the XLV (1300mm in the standard Musso), 1570mm wide (1100mm between wheel-arches) and 570mm deep. The tub has a plastic tub liner and four tie-down points.

For a direct comparison of dimensions: the standard Musso is 5095mm long with a 3100mm wheelbase while the XLV is 5405mm with a 3210mm wheelbase; the standard Musso is 1950mm wide and 1870mm high (the XLV is 1885mm). For reference, the Ford Ranger XLT dual-cab ute is 5406mm long (including rear bumper and tow bar receiver) with a 3270mm wheelbase.

The difference in dimensions between a standard Musso and the XLV version also means a difference in off-road angles so approach is 22.8° / 25° (XLV), departure is 23.4° / 20° (XLV) and rampover is 23° / 20° (XLV).

Minimum ground clearance is 215mm in a standard Musso and 220mm in the XLV, so the Musso XLV does stand taller off the ground than its regular stablemate.

Kerb weight is listed as 2090kg for the standard Musso and 2100kg for the XLV. Turning circle is 11.8m for the standard Musso and 12.2m for the XLV.

The KGM Musso is available in three grades - ELX, Advance, and the Ultimate. All three can be optioned up with an XLV Pack, which adds a 300mm longer tub giving you an additional 251L rear tub capacity, along with a 110mm longer wheelbase. XLV also increases maximum torque from 400Nm to 420Nm.

At the time of writing, our test vehicle, the Advance, has drive-away price of $48,700.

Standard features in the Advance include 12.3-inch touchscreen multimedia system (with wireless Apple CarPlay and Android Auto), 12.3-inch digital LCD instrument cluster, leather-accented heated and ventilated front seats with electric adjustment, 18-inch black alloy wheels, HID headlights, LED daytime running lights, and a suite of driver-assist tech, but more on that in the Safety section below.

Exterior paint choices include Grand White (no extra charge), Amazonian Green (metallic paint), Marble Grey (metallic paint), Pearl White (metallic paint) and Space Black (metallic paint). Metallic paint is available for $700.

Under the bonnet of the 630i is a 2.0-litre four-cylinder turbocharged petrol engine, which produces 190kW of power (at 6500rpm) and 400Nm of torque (from 1550-4400rpm). It uses an eight-speed automatic transmission, and is rear-wheel drive.

That may not seem a lot considering the size of this machine, but consider that some of the steamiest four-cylinder hot hatches have nearly the same outputs, and you realise this engine offers up a far-from slouched approach to propulsion.

The 640i xDrive has a 3.0-litre six-cylinder turbocharged engine with 250kW of power and 450Nm of torque. It gets the same eight-speed auto, but as the xDrive naming indicates, it's all-wheel drive.

But this is the one you'd prefer if you want to hit highway speed in a hurry - the 0-100km/h claim is 5.3 seconds, where the 630i takes a full second longer (6.3sec) according to the company.

The KGM Musso Advance with the XLV Pack has a 2.2-litre four-cylinder turbo-diesel engine – producing 133kW at 4000rpm and 420Nm from at 1600-2600rpm – it gets an extra 20Nm over the shorter version's 400Nm from 1400 to 2800rpm.

It has a six-speed automatic transmission, part-time 4x4 with high and low range, and an auto-locking rear differential.

This is a sluggish combination producing a generally lacklustre performance and the powertrain is not particularly efficient but, having said that, the Aisin auto is a reliable, well-proven transmission and the Musso ultimately does reasonably well with what it has.

The 4WD mechanicals and driver-assist tech actually work better in this package than they do in the Musso’s stablemate, the Rexton.

BMW claims fuel use of 7.0 litres per 100 kilometres, and you'll need to use 95RON premium unleaded when you fill up.

On my trip with the car, I saw about 9.0L/100km across mostly high-speed driving - some freeway, some highway, some country back road touring, and quite a bit of corners and city stuff thrown in as well. I think that's pretty respectable.

What wasn't so great was the lack of premium fuel in some of the 'away from civilisation' places on my route home. Keep that in mind if planning your own GT long-distance cruise.

Official fuel consumption for the Musso Advance with the XLV treatment is 9.0L/100km.

On this test, I recorded 11L/100km, but on the test I spent a chunk of time in 4WD high and low range.

The Musso has a 75-litre fuel tank, so going by my on test fuel-consumption figures, from a full tank, you could reasonably expect a driving range of about 681km.

But it is worth noting that I didn't have a lot of weight on board during this test – it was just me and the vehicle recovery gear – and you will have a lot more weight on board: your family or your mates, pets, camping gear, surfboards, kayaks, the whole kit and caboodle.

I'll put this out there - if you like to drive, there are BMW models for less than this one that will put a much bigger smile on your face. Like, a 440i Gran Coupe, or even just a 330i sedan…

But if you're in BMW's target market - that being older executive buyers who want space and luxury as a priority over thrills at the wheel, you could do a lot worse.

That's because the 6 Series GT lopes along the highway without fuss - the engine easily coping with the demands of overtaking moves, the adjustable drive modes allowing a light steering and wafting suspension feel to wile away the kilometres.

There are 'Comfort' and 'Comfort Plus' modes, but the latter is a bit too spongy and can be boaty feeling. The Comfort setting is made for the highway.

It is actually pretty agile for its dimensions.

If you decide to deviate from the straight sections, you'll be able to explore a little bit of dynamic range, especially when you dial up the 'Sport' mode, which changes the damper settings, steering weight, throttle and transmission response, and even the digital dials in front of the driver to a more aggressive look.

Our car had the 'Integral Active Steering' setting, which is a variable ratio steering system that includes rear steering - that essentially helps make is more turnable in corners at highway speed, and easier to park at lower speeds. It's difficult to say whether the assistance is excellent or not short of driving a car without the tech, but to this tester it was hard to hide the size and weight (1835kg kerb weight) of the vehicle.

That isn't to say it's clumsy or lumbering - it is actually pretty agile for its dimensions, though it makes a lot more sense on long drives and coastal cruises than it does in the narrow and twisty alpine roads of the Snowy Mountains Highway that I tested it on.

There's good grip from the tyres, and strong response from the powertrain - but if it were my money, and I had to have a 6 Series for whatever reason, I'd be looking towards the 640i model, which has a thumping six-cylinder with 250kW/450Nm - certainly an engine that would be more at home in this car. Plus that model comes with AWD.

On-road, the longer-wheelbase Musso is composed and comfortable with well-subdued NVH (noise, vibration and harshness) levels adding to an impressive overall sense of low-key refinement.

The engine and auto work reasonably well together, but as mentioned earlier this is a sluggish unit and it takes some urging to get it going. Pronounced lag from stand-still can be disconcerting, especially when you need plenty of zip to punch you into the traffic flow.

This ute’s suspension – double-wishbone, coil springs and stabiliser bar at the front, multi-link with coil springs at the rear – is firm, mostly controlled, but the Musso becomes jittery on irregular surfaces, such as lumpy back-roads bitumen and mildly corrugated dirt tracks.

One noteworthy annoyance: the Musso does not have adaptive cruise control.

Despite that, the Musso is actually quite reasonable for general driving duties.

As a 4WD, the Musso actually performs pretty well. It is a long wheelbase ute, so you have to drive it with consideration because you have to take into account its shallow off-road angles – approach, departure and ramp over – and it has quite a large overhang of tub behind the rear axle.

It has an auto locking rear diff, which is clunky in operation and I’d prefer a switchable diff-lock, which you could select whenever you want to, but otherwise it's effective in a workman-like kind of fashion.

Steering is not too shabby, it has a nice weight to it in all situations, whether you are on the bitumen or a dirt track. Turning circle on this long-wheelbase ute is 12.2m, but it feels nimble to steer around on the tracks.

The Musso has part-time four-wheel drive and high and low range 4WD gearing. It doesn't have a lot of power and torque in terms of the contemporary dual-cab ute market, but it does fine with what it does have; 420Nm in the XLV Musso gives it that little bit of extra punch over the standard Musso (400Nm) and that torque is available across a decent spread of revs.

If you intend to use your Musso as an off-road adventure vehicle or a weekend holiday machine, then it's handy to know that it's unbraked towing capacity is 750kg and its braked towing capacity is 3500kg and that's on par with the dual-cab ute market.

In terms of tyres, it’s the same story here as with most standard 4WDs – the Musso’s Nexen NPriz RH7 (255/60R18 108H) are not well-suited to anything other than light off-roading. The easy fix? Replace those tyres with some decent all-terrain tyres.

Payload is a listed 880kg (790kg in the standard Advance), GVM is 2980kg and GCM is 6480kg.

The Musso does not have an ANCAP rating because it has not been officially tested.

As standard, the XLV Advance has six airbags, auto emergency braking (AEB), lane departure warning, trailer sway control, blind-spot monitoring, rear cross-traffic alert, front/rear parking sensors plus reversing cameras and more.

Adaptive cruise control is not offered on Mussos in Australia, only old school cruise control.

BMW runs a condition-based servicing plan, which means the car will tell you when it needs servicing. But you can rest assured it won't (theoretically) cost you much, with the brand's 'Service Inclusive' pack. It covers you for basic maintenance as and when required for five years/80,000km. According to BMW, that includes "annual vehicle checks, oil changes, all filters, spark plugs and labour costs for the duration of the package".

BMW offers a three-year/unlimited kilometre warranty plan, and you get the same cover for roadside assistance.

The MY26 Musso range is covered by a seven-year/unlimited kilometre new-vehicle warranty, and five years of roadside assistance.

A service is required every 12 months or 15,000km, whichever occurs soonest with cost per service either $418 or $522.

Note, KGM considers off-roading as an example of a “severe driving condition” and so your Musso may require more frequent servicing.

KGM Australia has more than 50 dealerships across the country with a decent spread across metro and regional areas. Rextons can be serviced at those dealers or at approved workshops.