Mercedes-Benz G63 vs Audi Q5

What's the difference?

The Mercedes-AMG G 63 isn't for shrinking violets. It's bold, fast, and loud, and in second-generation form massively improved dynamically and technically. It's a lot of money, but there's a lot to love, and here's hoping it stays around for decades to come.

The updated Audi Q5 Sportback TFSI is a strong example of a luxury base-grade SUV, ticking most of the boxes in styling, comfort and features. It may not always outperform its rivals on paper, but it delivers where it counts, offering a refined, practical and engaging package that will satisfy.

The original (W460) G-Glass, then known as the G-Wagen (or Geländewagen for cross-country vehicle), was launched in 1979 as an ultra-capable off-roader, soon favoured by armies the world over. Arriving here in 1982, its distinctive, slab-sided form remained unchanged over the best part of four decades.

At close to 4.8m nose-to-tail, more than 1.8m across, and a bit over 1.9m tall, the G 63 is now longer (+110mm), wider (+106mm), and fractionally lower overall (-13mm), but still pulls off a convincing impersonation of a bread box.

Merc-AMG confidently quotes a drag coefficient (Cd) of 0.55 for the G 63, which isn't as bad as a brick (around 2.0… I Googled it) although it is in the same league as a heavy truck.

But it's the car's unique, upright stance, complete with pumped wheelarches and old-school flat glass, that sets it apart and draws people in. Looking more like a take-no-prisoners, functional device than a luxury cruiser, I can assure you it attracts as many admiring looks and comments as a low-flying supercar wedge.

The new-gen G 63 features AMG's vertically slatted 'Panamericana' grille, and our test example was fitted with the optional 'Night Package' ($5900) adding a range of dark exterior details including tinted indicator lenses, dark tinted glass, black exterior mirror shells and spare wheel ring, other black trim pieces and painted areas, as well as 22-inch AMG forged alloy rims.

Also worth noting, Merc has retained the G-Class's solid metal door handles, complete with the mechanism's unmistakable 'click-clack' opening and closing sound. Nice touch.

Inside, the biggest change is the upgrade from a conventional dual-gauge instrument cluster and central media stack to a pair of 12.3-inch digital screens, forming a sleek widescreen display, and bringing the G 63 in line with other recent Merc offerings.

Similarly, the gearshift moves from a traditional console-mounted set-up to Merc's 'Direct Select' lever on the steering column (exactly where the indicator stalk is located in 90 per cent of right-hand drive cars).  And the standard flat-bottom, leather-trimmed 'AMG Performance' steering wheel is a racy addition.

Like the exterior door handles, another tip of the hat to the car's heritage is retention of the horizontal grab handle ahead of the front passenger on the dash above the glove box. Nice to have something to hold on to if the going gets rough.

The Q5 Sportback is the more attractive sibling when compared to the standard SUV, with a shape that feels more dynamic and sport-oriented. The updated design dials back the sharper creases of the previous model in favour of softer curves, paired with slim matrix LED headlights. The revised 'Singleframe' grille has strong presence and the full-width rear light treatment adds to the Sportback’s visual appeal. Overall, it’s a very handsome vehicle.

Inside, the interior glow-up is immediately noticeable. The large new display takes centre stage in a redesigned dashboard that looks clean and appropriately sophisticated. 

There’s a good mix of materials throughout the cabin, including the beige leather upholstery, although the presence of hard plastics reminds you that this is still a base grade. Even so, the cabin largely hits the right notes for a luxury entry point.

There are a few details that don’t quite land for me. The door-mounted control panel on the driver's side feels busy and a little fiddly to use, and creates an oddly sized and positioned pull handle that just doesn’t feel nice to use. And this is very much a nitpick, but the black stitching on the beige seatbelts catches my eye all the time. None of these are deal-breakers, but they stand out in an otherwise well resolved interior.

The G-Class has never been a particularly squeezy proposition for passengers or cargo, but an extra 40mm in the wheelbase adds even more breathing space.

Getting in is the first step, and it's a big one. At 183cm tall, in an athletic mood, I could grab the A-pillar and swing up into the driver's seat in one vaguely respectable movement.

But, those side steps aren't just for show, and at the end of a long day provide a handy staging camp between terra firma and the lofty pilot's chair.

Once on-board there's plenty of room up front, with adequate storage including a bin between the seats (now with a double door opening rather than a single hinged lid), a modest glove box, oddments space and two cupholders in the centre console, and bins with space for bottles in the doors.

There's a 12-volt power outlet in the front, second row and cargo area, while there are two USB ports in the centre console bin and a charging USB port in the second row.

In the back I could have donned a dusty Akubra and still had headroom to spare, with generous foot room, and a substantial gap between my knees and the driver's seat (set to my position).

A fold-down armrest incorporates a pair of cupholders (as well as a through-port to the cargo space for long items) and there are map pockets on the front seat backs as well as space for bottles in the doors. Two adjustable air vents in the rear of the front centre console, and another pair in the B-pillars also provide climate-controlled air to those in the rear.

With the rear seats upright boot volume is quoted at 454 litres (VDA); enough to easily swallow our three-piece hard suitcase set (35, 68 and 105 litres) or the CarsGuide pram, or a largest-suitcase-and-pram combo.

There are tie-down shackles in each corner of the floor, usefully bright lighting, a netted storage area on the passenger side (containing five fluorescent emergency vests), and folding the 60/40 split rear seat liberates even more space.

Unfortunately, gaining access to that load space is fraught with compromise. First, the single-piece rear door hinges vertically and opens from right to left. No problem when you've nosed into a shopping centre space, but not so great when you're parking nose-to-tail on the left-hand side of the road.

That means you typically have a small space between you and the car behind to get the door open, and when it is at 90 degrees, you're blocked from unloading things onto the footpath until you've shut the door.

As well as that, the door has a full-size spare (alloy) wheel and tyre attached to it. Good because a full-size spare is welcome, and bad because it makes the already bulky door even heavier.

Those keen on towing things will be pleased to hear the G 63 is rated to haul up to 3.5 tonnes of braked trailer and 750kg unbraked.

Up front, the cabin feels spacious and comfortable, with plush (heated) electric seats, while the driver also benefits from a two-position memory function, which is a plus if the car is shared. My main gripe is the short seat bases, which become noticeable on longer drives.

In the rear, comfort largely holds up, though space is better suited to two adults due to the high transmission tunnel. The 40/20/40 split-folding rear seat is a practical inclusion and helps when juggling passengers and longer items.

Storage is mostly well considered. There’s a generously sized glove box and a couple of useful storage bins in each door, although the centre console is on the smaller side. The dedicated phone tray is a highlight, housing the wireless charging pad, two USB-C ports and a 12-volt socket. Both rows get cupholders and bottle storage, while rear passengers also benefit from USB-C ports, climate control, directional air vents and map pockets. Overall, there’s just enough space and amenity for adults or teens to remain comfortable.

Technology is handled by the updated media display, which features a responsive touchscreen and a menu system that’s easy enough to navigate. Wireless Apple CarPlay and Android Auto are quick to set up, and the built-in satellite navigation is clearly laid out. That said, the near-total absence of physical buttons may frustrate some, with functions like climate control buried within the touchscreen. The number of pop-up disclaimers on start-up also feels excessive.

Boot space is where the Sportback’s sloping roofline has the biggest impact. Load height is limited, and capacity tops out at 515L with all seats in place, making it the smallest in its segment, albeit only by around 10L. I like the deep underfloor storage, along with the cargo cover, net and hands-free powered tailgate. However, the lack of a spare tyre, replaced by a repair kit, is a deal-breaker for me as a country driver, though it may matter less to those with easier access to repair services.

The Audi Q5 Sportback is offered with a choice of petrol or diesel engines, across two grades before stepping up to the more powerful SQ5 variants. For this review, we’re testing the base petrol TFSI grade, which is also the only front-wheel drive option in the line-up.

It carries a before on-road costs price of $84,500 and comes well stocked with features that often sit on the options list with key rivals. Aside from the Genesis GV70 2.5T, which remains hard to beat for standard inclusions, the Q5 Sportback TFSI stands out as one of the better value propositions at this price point.

New for this update is a large panoramic display that combines an 11.9-inch digital instrument cluster with a 14.5-inch central media screen. The system includes built-in satellite navigation, wireless Apple CarPlay and Android Auto and access to the 'Audi Connect' app. The app allows access to remote services like locking/unlocking to car, checking fuel/charge levels, sending navigation routes, car finder and monitoring vehicle status (warnings, last parked location).

Our test car is fitted with optional 'Pearl Beige' leather upholstery, which is a no-cost option. New design elements include a full suite of LED exterior lights, including matrix LED headlights and side puddle lamps.

Comfort is clearly a priority in this grade, with electric and heated front seats featuring lumbar support and a two-position memory function for the driver. Three-zone climate control, a wireless charging pad, multiple USB-C ports and 12-volt sockets, along with a 360-degree camera system round out the major tech highlights.

Practical touches haven’t been overlooked either, with a hands-free powered tailgate, cargo cover and net plus a 40/20/40 split-fold rear seat set-up.

The G 63's 4.0-litre (M177) all-alloy V8 is closed deck design using direct-injection and a pair of twin-scroll turbos to produce 430kW at 6000rpm and no less than 850Nm from 2500-3500rpm. That's 10kW/90Nm more than the 5.5-litre twin-turbo V8 it replaces!

To improve throttle response and optimise efficiency, the turbos are located inside the engine's 'V', improving air flow and shortening the distance from the exhaust side to the turbos, and in turn, from the turbos to the inlet side.

And the housings on the twin-scroll turbos are divided into two parallel flow channels connecting with separate ducts in the exhaust manifold, allowing fine management of the exhaust gas coming in and pressure going out. Result is more torque and even better response times.

Drive goes to all four wheels via a new 'AMG Speedshift' nine-speed, dual-clutch auto (replacing the previous seven-speed auto transmission) with paddle shifters and a multiple downshift function which will go to the lowest ratio possible as you keep squeezing the shift paddle.

The 'AMG Performance 4Matic' all wheel drive system is front/rear biased 40/60 (50/50 in the previous model), although if you want to head off-highway the G 63 still features three 100 per cent diff locks and low-range off-road gear reduction.

The Q5 Sportback TFSI is front-wheel drive and powered by a 2.0L four-cylinder turbo-petrol engine paired with a mild-hybrid system. Combined outputs sit at 150kW and 340Nm, which places it toward the lower end of the segment when stacked against rivals such as the Genesis GV70 2.5T and Mercedes GLC300 Coupe offering 224kW/422Nm and 190kW/400Nm, respectively.

On the road, however, there’s still plenty on offer for everyday driving, with power delivery feeling smooth and accessible. The seven-speed transmission shifts effortlessly, helping the Q5 Sportback feel refined and easy to live with, even if outright performance isn’t its headline feature.

Claimed fuel economy for the combined (ADR 81/02 - urban, extra-urban) cycle is 13.1L/100km, with the 4.0-litre, twin-turbo V8 emitting 299g/km of CO2 in the process.

Despite the fact cylinder management tech means the engine will run on four cylinders under light load, and start-stop (with 'glide mode') is standard, we managed 16.7L/100km (measured at the bowser) over a mix of city, suburban and freeway running. To be expected for such a big bus, especially one that constantly tempts you into squeezing the throttle just to hear the exhaust bellow.

Minimum fuel requirement is 98 RON premium unleaded, and you'll need 100 litres of it to fill the tank.

The Q5 Sportback TFSI has a claimed combined (urban/extra-urban) cycle fuel consumption figure of 5.7L/100km and paired with its 65L fuel tank offers a theoretical driving range of up to 1140km. An impressive result on paper.

After a mix of long highway driving and my usual urban runaround, real-world consumption settled at 5.8L/100km, which is almost spot on.

It also highlights the Q5 Sportback TFSI’s performance/efficiency trade-off. While its outputs are modest relative to some rivals it rewards you with excellent economy in real-world use.

Let's cut to the chase. The G 63's pure grunt overpowers its challenging aero profile to thrust this boom box on wheels from 0-100km/h in a claimed 4.5 seconds. And believe it or not, despite its greater length and width, it has enough power to punch a 240km/h hole in the air (maximum velocity is limited to 220km/h if you choose not to opt for the 'AMG Driver's Package').

The new electronic architecture brings with it the latest version of Merc's 'Dynamic Select' system with five driving modes adjusting the engine, transmission, suspension, steering and assistance systems right up to maximum attack Sport+ mode.

All 850Nm of peak torque is available between 2500-3500rpm and pinning the throttle anywhere in that band feels like lining up a runway and preparing to rotate for take-off.

The two-stage exhaust flap arrangement allows you to turn the noise up from growl to roar even at modest around town speeds, and the nine-speed transmission is sharp and positive, with the multiple downshift function (in manual mode) hilariously good fun.

The racy AMG sports seats are as grippy as they are comfortable, and the fat 295/40 Goodyear Eagle F1 rubber, wrapped around the optional 22-inch forged alloys, does a good job of keeping all that mass and momentum in control as the high riding G 63 careens around corners.

And speaking of mass, the job of hauling it from warp speed to rest sits with big ventilated discs all around (cross-drilled 400mm front/370mm rear), clamped by monster six piston calipers at the front and single piston at the back. They're progressive and reassuringly powerful.

So, the performance is as dramatic as ever, but when I think of previous Merc-AMG G-Class offerings, two main shortcomings come to mind... steering and ride.

The steering was like a laggy mouse, with a few beats separating input at the wheel from response at the front treads. And the damping came up short, with a bouncy ride par for the course.

Still sitting on a ladder-type frame, the new G's suspension was developed by Mercedes-Benz and Mercedes-AMG. And finally, it has a decent double-wishbone independent front-end, with a rigid axle at the rear and coil springs all around. Plus, a strut tower brace, Merc-AMG calls it a 'suspension bridge', now connects the front strut towers, increasing torsional rigidity.

Ride comfort, especially in the most compliant 'Ride Control' suspension setting and riding on the big 22s, is massively better. It's no limo. You'll still feel jittering over higher frequency imperfections. But it's way, way ahead of the first-gen version.

The steering system changes from a recirculating ball to rack and pinion, and is now variable ratio with electro-mechanical rather than purely hydraulic assistance. And it's also much improved. We're not talking about a Lotus Elise-style connection with the road, but the steering is clearly more predictable and responsive.

One thing that hasn't changed is an ocean liner-worthy, 13.6m turning circle. You'll need to plan ahead for U-turns and reverse parks, but enough parking cameras (including surround view) to please Cecil B DeMille are on hand to help.

It's like a whole new world with a familiar cover wrapped around a markedly improved package. But (there must be a but) visibility is still compromised by thick window and door pillars, and despite the new dash layout ergonomic efficiency is patchy, with some switches and knobs located in relatively awkward positions.

As mentioned earlier the G 63 features three 100 per cent diff locks and low-range off-road gear reduction. But forget breakover angles and wading depths. This 4x4 seeing off-road action is as likely as an Abbott 2.0 prime ministership.

Suffice it to say, this car wears the 'Schöckl' badge at the base of its B-pillar. And in case you were wondering, Schöckl is a 1445m mountain in Graz, the Austrian city where the G-Class is built (and big Arnie Schwarzenegger was born!).

In the second-gen G-Class's development, prototypes covered roughly 2000km over a five kay trail including gradients of up to 60 per cent and lateral inclines up to 40 per cent. So, despite its irrelevance, the off-highway box is ticked.

There’s enough power in the base grade to keep things engaging on the open road, whether overtaking or maintaining pace, with a reassuring sense of reserves and smooth, punctual delivery.

Despite the firmer suspension, ride comfort remains high thanks to the newly tuned damping system, which absorbs bumps without sacrificing road feedback. The cabin is quiet at speed and at low speeds the car can switch to its hybrid system for extra refinement.

I’m not a huge fan of the adaptive steering assist, particularly on winding roads, as it can overcorrect at times. Overall, though, the Q5 Sportback delivers enjoyable, sporty dynamics.

Visibility is good from the front and sides, while the rear window is a little on the small side. It’s easy to get accustomed to the car’s dimensions and a clear 360-degree camera view comes standard across all grades, providing a clear view that automatically activates during low-speed manoeuvres. Parking this car is straightforward and stress-free.

The Audi Q5 Sportback carries a fresh maximum five-star ANCAP safety rating from 2025 testing. It comes with nine airbags, including side-chest airbags for both rows which is a standout feature, as these are often limited to the front seats.

The safety equipment suite is strong, featuring lane departure warning, lane keeping assist, side exit warning, blind-spot monitoring, traffic sign recognition, dusk-sensing LED headlights and emergency call capability. There’s also front collision warning, rear cross-traffic alert with assist and rear turn-assist. Adaptive cruise control is generally well-calibrated, though it can occasionally slow for vehicles outside your lane.

Autonomous emergency braking covers cars, pedestrians, cyclists, motorcyclists, and backover assist which is operational between 5.0 and 250km/h. Child safety is supported with two ISOFIX mounts and three top-tether anchor points, although only two seats fit comfortably.

Mercedes-Benz (and by extension Mercedes-AMG) offers a three-year/unlimited km warranty with 24 hour 'Road Care' emergency roadside assistance provide for three years.

Servicing is recommended every 12 months/20,000km and a capped price servicing plan is available at Silver and Platinum levels for up to five years/100,000km.

The Q5 Sportback comes with Audi’s five-year/unlimited km warranty, which also includes complimentary roadside assistance - all fairly standard at this end of the market. A five-year pre-paid servicing plan is available for $3520, which is cheaper than the pay-as-you-go option, though it’s not the most competitive compared with some rivals. For instance, BMW offers the same coverage for $2475, while the Genesis comes with complimentary servicing.

You can also extend the service period by two years with the 'Audi Advantage Package' for an additional cost. Services are spaced at sensible intervals, every 12 months or 15,000km, whichever comes first, making maintenance straightforward and predictable.