Aston Martin DBX vs Mercedes-Benz G63

What's the difference?

As with all Aston Martins the DBX is a seriously beautiful car with that high-end exotic but restrained exterior styling for which the brand is known. As with all Astons, too, the busy interior design may put some minimalism fans off and those high-placed shifting buttons pose a functionality problem.

As an SUV the DBX is spacious and practical. You could use this daily as a family car. I did and found it easy to adapt to.

The driving experience left me disappointed. I didn’t feel the same close connection with the DBX while driving that I have had with other super SUVs, such as the Lamborghini Urus and more affordable models offered by Porsche and Mercedes-AMG.

But then, you see those other cars everywhere, unlike the DBX which is a rare and beautiful creature, despite the flaws.

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.

I'm not one to name drop but I was having a chin wag with Marek, that's Marek Reichman, Aston Martin's Vice President and Chief Creative Officer, the fellow who has designed every Aston from the past 15 years, that Marek. Anyway, before the DBX came out he told me any SUV he designed would be unmistakably an Aston Martin.

I think he nailed it. The gaping Aston Martin grille is unmistakably the same as the DB11's and the tailgate, which although is the back hatch to a large SUV, is absolutely the same as the rear end of the Vantage.

Everything in between has all the family hallmarks. There are those oval headlights and the huge beak of a bonnet, the chiselled side panels with wheel arches that push up towards the sky and those rear haunches.

Not a fan of minimalist design? Then you'll love the DBX's cabin and its dashboard cluttered with dials, buttons, and switches.

It's like the cockpit of a plane and it's a very Aston Martin thing – just look at the layout of the DB5 from the 1960s, it's a mess, a beautiful mess though. The same goes for current models such as the DB11, DBS and Vantage.

Seriously, if there was one area where Marek may have decided not to make the DBX unmistakably Aston Martin, I wish it had been the interior.

Still, I think the DBX has the best cabin design of any current Aston, with its large media screen built into the centre console and more modern styling.

But regardless of what it looks like the feel of the materials is outstanding. There's a thick leather coating on just about every surface, apart from those which are solid, cold metal, like the paddle shifters and door handles.

It's a plush, sporty place, like Batman's suit only it smells a lot nicer.

The DBX is a large SUV at 5039mm long, 2220mm wide with the mirrors unfurled and 1680mm tall. Yep, this thing fills up an entire space in a car park.

The DBX comes in a choice of 53 colours. Yes, fifty three.  There's the 'Onyx Black' my test car wore, but also 'Royal Indigo', 'Supernova Red' and 'Kermit Green.'

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.

Until the DBX came along the most practical Aston Martin was the five-door, four-seater Rapide which had a huge rear hatch and a boot big enough to swallow an entire matching five-piece luggage set – I saw it with my very own eyes.

Now there's the DBX which seats five (well, four comfortably, because nobody wants to be in the middle) and has a boot with a luggage capacity of 491 litres under the leather cargo cover.

As you can see it fit our three-piece CarsGuide luggage set, and I also used it to pick up some compost – very likely the first time anybody has done this to a DBX ever in Australia, and probably the last.

Cabin storage is impressive. The floating centre console is suspended like a hammock and under it is a huge bunk for a phone, wallet, and small bags. The split-opening armrest houses a large box, too.

The door pockets are on the small side but there are two cupholders up front and another two in the fold-down armrest in the second row.

Talking of rows, there's no third row. The DBX comes as a two-row, five-seater only.

It’s a roomy second row, with more than enough space for me at 191cm (6'3") tall to sit behind my driving position and headroom is excellent, too.

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.

Okay, you're laying down a quarter of a million bucks ($247,329 before on-road costs) and it's fair to expect some serious tech and standard equipment to keep you feeling warm and fuzzy after you're finished impressing friends and family with the G 63's howling acceleration.

For a start, there's a bunch of leading-edge safety tech on-board (detailed in the safety section below), and as expected that substantial cost-of-entry brings an extensive list of luxury features.

We've touched on the twin 12.3-inch 'Widescreen Cockpit', and available media includes digital radio and TV tuner, internet connectivity and 3D nav (with dynamic route guidance), as well as smartphone integration with Apple CarPlay and Android Auto.

Audio is a thumping 15-speaker, and 590-watt Burmester surround sound system, and the ambient lighting set-up offers a choice of 64 colours.

Also included are 'Multibeam' LED headlights, 'AMG Ride Control' adaptive damping, a 'Parking Package' with 'Active Parking Assist' and 360 camera, a sliding glass sunroof (with tilt function), the selectable AMG sports exhaust system, keyless entry and start, the AMG Performance steering wheel (trimmed in nappa leather), and 21-inch AMG '5-Twin spoke' alloy wheels.

Then there are the three 100 per cent differential locks (plus an 'off-road information centre'), electronically adjustable front seats (ventilated front and heated front and outer rear), steering column and mirrors (with memory function), three-zone climate control, nappa leather upholstery, a leather-finished dashboard with open-pore ash wood trim, a 'Dinamica' microfibre roof liner, and an AMG-specific IWC design analogue clock. Plus, the 'Dynamic Select' system enables a choice of pre-set driving profiles or individual settings.

The optional 'Exclusive Interior Plus Package' ($10,300) fitted to 'our' car adds deluxe nappa hide on the dashboard, door centre panels and grab handle, as well as a diamond quilted treatment on the seat centres, a black 'Dinamica' roof liner, velour floor mats (with edging in nappa leather), a frameless interior mirror and air vents in 'Silvershadow'.

On top of that the test vehicle was optioned with the 'Night Package' ($5900) detailed in the Design section, and Designo 'diamond white bright' paint ($5900) for a manufacturer's recommended list price (MRLP) of $269,429.

That puts the G 63 in the same price and equipment ballpark as the supercharged V8 Range Rover Autobiography ($268,900), twin-turbo V8 Porsche Cayenne Turbo ($239,400), and its Mercedes-AMG GLS 63 sibling ($221,729), powered by a version of the 5.5-litre twin-turbo V8 used in the first-gen G 63.

An impressive trio of alternatives, but in reality the idiosyncratic G 63 doesn't have any direct competitors, and for those who give in to the pull of its powerful tractor beams value-for-money becomes a uniquely personal concept.

When it came to giving the DBX an engine Aston Martin chose the same 4.0-litre twin-turbo V8 that's in the Vantage only they made it more powerful – 25kW more at 405kW (542hp). There's 15Nm more torque as well, at 700Nm.

Shifting through a nine-speed automatic transmission the DBX's 0-100km/h time is 4.5 seconds, which is almost a second slower than the Vantage's 3.6 seconds.

That said, the DBX weighs more than 2.2 tonnes, has a maximum ground clearance of 190mm, can wade rivers to a depth of 500mm and has a braked towing capacity of 2700kg. Oh yeah, and it's all-wheel drive.

That engine is one of the world's best V8s. It's light, compact, efficient and can produce enormous grunt. It's also made by Mercedes-Benz. Yup, it's the same (M177) 4.0-litre V8 found in the Mercedes-AMG C 63 S and a stack of other AMG-badged beasties.

There's just one thing, the V8 in the DBX doesn't sound as good to me as the one in a Mercedes-AMG. Aston's version has a less guttural and breathy exhaust note.

Sure, it still sounds amazing and when pushed hard it screams like Boudica charging into battle, but how often will you drive like that?

Most of the time we're in traffic in the suburbs and city trundling around at 40km/h. But even with the ‘loud’ exhaust mode set the note is still not as deep and brash as the AMG, which sounds delicious even at a standstill.

You probably already know why Aston Martin uses Mercedes-Benz engines. But just in case, it's because the brand with the star has been a part owner since 2013. Aston saves money and in return gets some of the best engines in the world.

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.

In my fuel test of the DBX I took in open roads and city streets and measured 20.4L/100km at the pump.

On the same test loop the Urus I drove used 15.7L/100km and the Bentley Bentayga consumed 21.1L/100km.

It's not surprising these super SUVs are thirsty, but if you're spending all your time on city roads you can expect the consumption to be even higher.

What is surprising is Aston Martin thinking anyone could really get 12.2L/100km, but then all carmakers tend to claim overly ambitious fuel economy figures.

Just think, your next car after this will probably be electric, so enjoy the petrol while it lasts.

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 DBX is a circa 550 horsepower giant that can reach out and almost touch 300km/h. But testing it on Sydney's roads is like having a champion racehorse in your backyard and your neighbour asking you what it's like to ride.

A racetrack wasn't handy at the time and I'd signed a form saying I'd not put any more than 400km on the clock during its stay with me, which meant having to choose my test loop carefully.

Fortunately, this was before Sydney was plunged into the current COVID lockdown, which makes that 400km now seem vast.

First, the DBX is an SUV anybody could drive, every day. Visibility is great and the ride is fine considering it rolls on 22-inch wheels and wears rubber as wide as some doorways and as thin as my socks (285/40 front and 325/35 rear Pirelli Scorpion Zero). Power delivery is smooth and predictable.

I did drive it every day, doing the shopping, school pick ups, a trip to the garden centre to fill it with plants and (ahem) compost, and it performed exactly as a large SUV should.

A source of frustration was the location of the shifting buttons high on the dashboard. Have a look at the images. Even with my chimpanzee-like long arms I had to stretch to change from Drive to Reverse. And with a not so small turning circle of 12.4m, three-point turns were a bit of an arm workout.

But the bigger frustration was the driver-car connection which didn't feel quite right. A good car-driver connection is essential for any great performance car.

Yes, there wasn't a race circuit where I could get to know the DBX quickly. But a good road, driven often with test cars, reveals a lot, too.

And the DBX didn't feel as good as the Lamborghini Urus, which is not only more comfortable but feels more dynamic and offers a superb connection between the driver and the machine.

The DBX is fast, it's powerful, the huge brakes pull it up quickly (almost violently so, if required) and handling is incredibly good.

It's just that I didn't really feel a part of it much at all. You know, the whole driver and car becoming one, thing. I felt like the third wheel on a date.

That connected feeling has been mastered by Porsche with its SUVs, but I feel the DBX needs more work. It felt unfinished.

I was told at the start that the DBX I was testing was a pre-production vehicle, but I'm sure that doesn't cover the shortcomings in the way it drove.

It's disappointing. I was hoping for better, but I think further development will see that come later.

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.

The second-gen G 63 hasn't been assessed by ANCAP or Euro NCAP but its new electronic architecture brings the car up to speed on active safety tech, now incorporating 'Distronic' cruise control with 'Active Distance Assist', 'Active Brake Assist', AEB (forward and reverse), 'Active Lane Keeping Assist', 'Blind Spot Assist', 'Adaptive High-Beam Assist', tyre pressure monitoring, and 'Traffic Sign Assist'. Plus, the 'Pre-Safe' system prepares the vehicle and occupants in the face of an inevitable collision.

And once that impact has occurred, you're protected by nine airbags, including rear seat airbags, full-length curtains and a driver's knee bag.

There are three top tether points for child restraints/seats across the back seat, with ISOFIX anchors in the two outer positions.

The DBX is covered by Aston Martin's three-year-unlimited kilometre warranty. Also included is roadside assistance.

Service intervals are every 12 months or 16,000km.

Aston Martin doesn't have have capped price servicing for the DBX nor can owners purchase a maintenance plan for the SUV.

We asked Aston Martin for an estimate of how much owners can expect to pay for servicing over the life of the warranty, but a spokesperson told us, "We are unable to provide an estimate on the cost of servicing over three years."

With Aston Martin unable or unwilling to give us any guidance on servicing costs, maybe there are recent model Aston owners out there who can. Let us know in the comments section below.

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.