Audi RS4 vs Kgm Musso

What's the difference?

What a way to send off this generation of Audi RS4 and RS5. The extra focus courtesy of those trick coil overs and drama from the exhaust plus the sharper gear changes deliver the best Audi has done with these RS products. 

There are some compromises, with the suspension favouring outright control over low-speed comfort. It’s also true that the current BMW’s M3 and M4 are more impressive, but when the products are nearly seven years fresher than Audi’s, what do you expect? 

Plus, those looking for a more restrained and polite fast executive sedan (or wagon) will gel with the Audi’s sophistication. There aren’t many of these Competition Plus RS4 and RS5s coming to Australia and they are impressive visually and from behind the wheel. It’s a fitting way to send off the current generations.

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

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.

The RS4 Avant’s 'Progressive Red' metallic helps the black milled 20-inch alloy wheels pop. Its stance is hugely purposeful with wheels tucked right up in the blistered arches courtesy of the lowered ride height — it's how the Avant would have looked in a design sketch.

The visual bulk of the long-roofed RS4 gives it the sort of proportions motoring journalists love to wax lyrical about, even if plenty of buyers still prefer coupes or lifted SUVs. 

The RS5's more flowing, elegant lines match well with the Navarra Blue paint work, silver-accented wheels and conventional leather-appointed seats within. 

Both cars have effectively identical front cabins reflecting Audi’s classy and sleek design language. The integration of technology is pretty good and the RS4’s additional red styling pack really makes it feel sporty within.

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.

The RS4's cabin is excellent, with a good mix of physical buttons and responsive touchscreens for control. There’s enough storage space for this kind of vehicle, with good door bins and well-sized cupholders in the centre as well as USB-C and -A charge points. 

Audi’s multimedia system is friendly though the large touch targets and dark background aren’t as crisp as those fitted to the latest rivals. The screen isn't as big, either, measuring 10.1 inches for the multimedia item. The RS4 supports wireless Apple CarPlay and Android Auto.

That said, Audi’s 12.3-inch digital driver’s display with bright and poppy mapping software and generous customisation remains right at the head of the pack. 

There is a panel of switches below the touchscreen for climate control, physical selection of the five-or-so drive modes and a collection of helpful buttons on the perfectly-shaped and sized leather-appointed steering wheel.

It lacks F1 or DTM wow-factor compared to the C63 and M3 with their easy-access driver mode buttons and toggles on the steering wheel but the RS4's restrained looks will resonate with those that prefer a bit more elegance inside. 

Neither the RS4 nor RS5's back seats are designed for those over about 175cm. The RS4’s roof is a little higher so it is good enough for most adults but the RS5’s sloping profile compromises things. It has two individual buckets compared to the RS4’s three-wide bench. 

Rear seat passengers get air vents, an individual climate zone, bottle holders in the doors, USB charge points and ISOFIX attachments for the outboard seats, with matching top tethers in the seat backs.

The Audi RS4’s boot is a generous 505L with under floor storage and a netted area on the driver’s side. Folding the 40/20/40 split-fold bench increases space to 1495L. That said, the RS5’s 465L is still very good, though it is not quite as practical in the real world. 

Being fitted with roof rails makes for sleek integration of roof racks for the RS4 to slip roof pods, bike racks or whatever else you might choose to take on a trip away.

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.

Audi’s 2.9-litre twin-turbo petrol V6 has seen plenty of use across performance products from Audi and Porsche, including the Macan S and Audi S6. 

In the RS4 and RS5 Competition Plus, it develops the same 331kW (at 5700-6700rpm) and 600Nm (at 1900-5000rpm) as the regular car. This makes it an extremely flexible engine that delivers predictable punch anywhere in the power band.

That said, it lacks the explosive character of BMW’s twin-turbo inline six — the figures are only 15kW and 50Nm higher on paper yet the M3’s response is that much more ferocious. 

Audi’s RS division has tried to capture a bit more emotion, retuning the eight-speed torque converter automatic transmission for crisper shifts. This also benefits the RS4’s 0-100km/h sprint time, which falls two tenths to 3.9 seconds in Competition Plus guise. 

The V6 breathes a little easier, too, with a different exhaust. Audi says the extra sound is down to 8.0kg less sound deadening in the car.

There’s more resonance at idle that does feel tiring sitting in traffic idling but the trade-off is a brawny mid-range baritone that develops into a shrill bark approaching the redline.

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.

The Audi RS4 wagon is rated to use 9.5L/100km in ADR combined cycle (urban/extra-urban) consumption testing while the slipperier RS5 returns 9.4L/100km in the same test. 

We weren’t able to run accurate or particularly relevant fuel figures on the event but the trip computers showed around 12L/100km in both RS4 and RS5. 

While these numbers are high compared to your average passenger car, the Audi is more efficient than BMW's rivals, and gets remarkably close to the hybrid C63 in the real world.

The fuel tank is quite small for this kind of vehicle at 58 litres. That limits the RS4’s theoretical driving range to 611km. 

Unsurprisingly, the Audi RS4 and RS5 require 98 RON premium unleaded petrol. 

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.

The time allocated to driving the RS4 Avant Competition Plus was fairly limited and we were sadly unable to sample how the highly adjustable coil over suspension performed where it makes most sense — on the racetrack. 

Still, winding country roads between Sydney and the Southern Highlands served up some challenges, demonstrating how the Competition Plus pack changes the character of the RS4 and RS5. 

The only real negative is comfort, specifically over those horrible plastic speed bumps that litter shopping centre car parks. With adaptive dampers, carmakers can set programs for these kinds of obstacles to soften and stiffen the clever shocks at just the right time. Not so the Competition Plus pack cars, which ride these bumps harshly.

That about does it, though, and everything thing else is a net benefit. The steering system addresses some criticism of the earlier RS4s. Further than a retune, the Competition Plus gets a new rack, that is non-progressive with a fixed ratio of 15:1 (instead of 13.3:1) and 2.4 turns lock-to-lock. The reactions to each input feel a hint more faithful. 

When above 40km/h the coil overs come into their own. Even though the RS4 rides firmly it doesn’t constantly jiggle over small bumps. Over sharp-edged hits, the suspension rounds the hits off so, while you feel them, there’s a sense of control and sophistication. 

Having speed limits to contend with means it is essentially impossible to find the limits of grip of the 275/30R20 Continental SportContact 6 tyres on the road and there isn’t much body roll, either.

The RS4 is still rewarding, though, getting up on its toes just enough through a series of bends to feel engaging. It gives an impression of being quite light and at 1820kg it is now considered featherweight next to rivals.

The RS4's Quattro all-wheel drive system favours the rear wheels when driving normally (60 per cent rear) and can send up to 85 per cent of the drive to the back axle. 

The tweaked electronically-controlled rear limited-slip differential amplifies the throttle steer-ability of the RS4, giving you the confidence to squeeze the gas on exit. 

It helps that the Competition Plus bucket seats are a little thinner and set closer to the floor giving you more feedback. This is the key differentiator between the RS4 and RS5 we drove — the buckets make the car feel alive. 

Strong brakes are made up of 375mm front rotors clamped by six-piston calipers. Optional carbon ceramic brakes with larger 400mm front rotors help save 6.5kg and, if you plan to use the RS4 on track, are a smart buy along with a set of Pirelli P Zero Corsa semi slick tyres ($850). 

Really, though, neither the RS4 nor RS5 are the perfect car for the track. They are plenty capable and fast on the road with just enough fun, reward and character thrown in to keep you coming back for more.

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.

Audi covers the RS4 and RS5 with a five-year/unlimited kilometre warranty which is now the expected norm across the premium part of the market. 

A five-year service plan can be pre-purchased, costing $3630 for both models with maintenance due annually or every 15,000km. 

After the five-year warranty period, owners can choose to extend the service packaging and warranty for two extra years at a cost of $4260. This can be done twice, extending the warranty up to nine years.

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.