Aston Martin DBX vs Audi RS Q8

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 Audi RS Q8 Performance is a lot - of everything. It offers lots of power, lots of performance, lots of space and lots of luxury. But it’s also a lot of money, and at more than $250k it’s not going to be on everyone’s shopping list. It’s a very niche proposition for a small group of buyers. For those select few, those who want a lot of everything and who crave the ultimate of whatever product they’re buying, then the RS Q8 Performance is going to be a very tempting proposition - even if they never set any lap record in it.

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

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.'

We don’t refer to ‘facelifted’ cars for no reason, the RS Q8 Performance has a number of visual changes.

These include a new Audi ‘singleframe grille’ and new front bumper design, with a new Matt Carbon trim package available to highlight that.

There’s also a new rear bumper design as well as new digital daytime running lights at the front and digital OLED lights at the rear.

The unique forged alloy wheels are another design change, but also bring a functional element. Measuring 23 inches they do a good job of filling out the wheel arches and give the RS Q8 Performance a purposeful stance and good proportions. But they are also 5kg lighter per wheel than the 22-inch rims on the RS Q8, saving unsprung weight to help the ride and handling.

Inside, Audi hasn’t made any dramatic changes to the design, which is fine because the brand does some of the best cabins on the market in terms of look and feel.

What is new is an aluminium inlay and an optional RS interior design package which provides a unique finish to the seats, with contrasting stitching, for an additional $4100.

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.

While it’s easy to get swept up in the power and speed of the RS Q8 Performance, it’s important to remember that it’s an SUV and it needs to offer ‘utility’ as well as ‘sports’. 

With that in mind, the front seat occupants are well looked after with supportive and comfortable sports seats, with a good amount of small item storage spaces. 

The rear seats are surprisingly comfortable, despite the sloping roofline of this ‘coupe-style’ SUV. Audi has cut recesses into the ceiling to create more headroom, so it will be fine for anyone under six-foot tall. Despite there being five seat belts, this is realistically more of a four-seater for adults, although three smaller kids could squeeze across the back.

There’s also a pair of cupholders, two USB-C ports, a 12-volt outlet and your own climate controls for the rear passengers.

As for the boot, again it loses some volume because it’s not a wagon-style SUV, but there’s still a decent, square floor space with a claimed 605 litres of capacity.

So, overall the Q8 obviously isn’t the most practical version of an SUV, but it does well given its focus on style.

Audi updated the Q8 range earlier this year, with refreshed looks after seven years on sale and a plug-in hybrid powertrain to cater for new demand.

A new RS Q8 is coming later in the year, but the RS Q8 Performance has arrived first to make a bigger impact. It naturally gets a performance boost, but there are some other extras beyond more kilowatts.

These include RS ceramic brakes, lightweight 23-inch forged alloy wheels, Pirelli P-Zero tyres, unique aluminium inlays and a special RS layout for the digital instrument display.

Which is good, because the RS Q8 Performance costs nearly $25k more than the ‘standard’ RS Q8, priced from $255,800 plus on-road costs.

Luckily for a car costing a quarter of a million bucks, there’s also plenty of luxuries too, including Nappa leather upholstery, four-zone climate control and a 17-speaker 730-watt Bang & Olufsen sound system, amongst others.

When you compare it to its rivals on performance terms, in particular the Urus and Cayenne Turbo, the $250k asking price doesn’t exactly look ‘cheap’ but it is good value in comparison.

The Audi is a touch pricier than the BMW X6 M Performance at $250,900, but quite a bit more affordable than the Mercedes-AMG GLE63 S Coupe at $268,900.

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.

This is the latest iteration of Audi’s twin-turbo 4.0-litre V8 petrol engine - and it’s a beauty.

While this engine is used in a variety of models, for the RS Q8 Performance Audi has taken power to 471kW with 850Nm of torque, which, as mentioned earlier, makes it the most powerful internal combustion engine Audi has ever offered in a production car.

That’s also a big boost over the previous RS Q8, which managed 441kW/800Nm, and is only just shy of the 485kW/850Nm offered by its ‘cousin’, the Porsche Cayenne Turbo GT.

Audi claims that the RS Q8 Performance will launch 0-100km/h in just 3.6 seconds and keep going to an electronically limited top speed of 250km/h. We tried to test the acceleration time on a closed circuit, but driving into a very strong headwind the big SUV could manage only 4.4 seconds - which is still a very quick time given its size and luxury.

The engine is paired to an eight-speed automatic transmission and Audi’s trademark quattro all-wheel-drive system to help smoothly transmit so much power to the road.

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.

Unfortunately you don’t get the most powerful production engine without some trade-off, and for the RS Q8 Performance that means significant fuel consumption. The official fuel economy rating is a very thirsty 12.2L/100km, but that's the best-case scenario too. If you partake in some spirited driving that unleashes the full potential of the engine will result in a higher rate of premium unleaded being consumed by the big V8. We saw returns in the high teens across our time, but that was largely open road driving, so we’ll reserve final judgement for an extended test drive across more varied conditions.

Thankfully there’s a fairly large 85L fuel tank, so if you can hit the claimed average you can get a theoretical 696km of range.

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.

Obviously the RS Q8 Performance is all about speed, Audi made its intention clear by sending it to the Nurburgring to set a new SUV lap record for an SUV. But the reality is most owners are unlikely to hit the racetrack in the RS Q8, so what’s it like on the road?

In a word? Impressive.

While the engine is undoubtedly the star attraction offering up so much effortless performance, the RS Q8 Performance wouldn’t be so quick around the Nurburgring or as nice to drive on the road without its highly advanced chassis systems.

It has an array of technology to help it handle, it has active air suspension, adaptive dampers, active roll stabilisation and all-wheel steering, which help to make this big SUV handle like a much smaller car.

The suspension does a remarkable job of providing a compliant ride on such large alloy wheels, while also providing responsiveness.

The handling is certainly helped by the all-wheel steering, which gets the rear wheels to turn in the opposite direction to the fronts at low speed (below 50km/h), but in the same direction at high speed (above 80km/h), making the big SUV feels much more direct when changing direction.

As for the overall experience, that’s helped by Audi’s surprising decision to actually remove some of the sound insulation, which allows you to hear the engine even more than you ordinarily would. This really plays to the dynamic nature of the RS Q8 Performance.

The RS Q8 Performance comes stacked with the full suite of active safety features. These include adaptive cruise control, lane change warning, rear cross-traffic alert and surround-view cameras.

ANCAP rated the Q8 as five stars back when it first launched in 2019 and that rating is due to expire at the end of 2025. However, ANCAP states that it only applies to the 3.0-litre Q8 models, not the V8-powered RS variants.

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.

Despite the extra power and fancy new brakes, the RS Q8 Performance costs the same to service as the existing RS Q8.

That means $4690 for Audi’s five-year service plan, and $5720 for the Audi Advantage.

The latter package includes an extra two-year, unlimited kilometre warranty on top of Audi’s five year/unlimited km coverage. It also includes two extra services and two more years of roadside assistance, to keep you covered for seven years total.

That’s good, but it’s still an extra cost when many mainstream brands already offer seven years of coverage as standard.