Mercedes-Benz AMG GT vs Aston Martin Vanquish

What's the difference?

The GT63 4Matic+ is a breathtaking example of everything that Mercedes-Benz and AMG are.

Ferociously fast, incredibly agile and superbly sophisticated, it should be on anybody’s shortlist, if that also includes a Porsche, Aston Martin, Maserati or even a Lamborghini. And it’s definitely much more than yesterday’s SLC ever was – for similar money in today’s terms, as it turns out.

But, around Tasmania’s glorious roads at least, the Mercedes-AMG lacks the ride comfort and road noise isolation to be a fully-rounded-out GT, and that’s a disappointment for a brand with such formidable history in making such cars.

The definition of luxury is having something you want, rather than something you need. And the Vanquish is definitely something you don’t need, but will desperately want once you’ve experienced it. It’s opulence on wheels, the kind of car you buy mostly because you can. Because owning a V8-powered Aston Martin wouldn’t cut it in your circle of friends. Or because you just want the very best things in life, cost be damned.

This is still clearly a Mercedes AMG GT coupe, like the 2014 C190 original, but a ground-up redesign sees it subtly yet significantly altered.

Some 270kg heavier than before, the larger-in-every-dimension body combines aluminium, steel, magnesium and fibre composite materials for improved rigidity and a lower centre of gravity. Length (4729mm) and wheelbase (2700mm) have been stretched by 177mm and 70mm respectively. Width (1984mm) and height (1352mm) are also up.

The nose treatment is similar to before, especially with the bulgy bonnet and signature vertical slatted grille fitted. These, combined with the LED digital headlight shape effect, is reminiscent of, but far-better executed than, the goofy-looking MG5’s face.

Underneath, it's an all-new platform shared with the SL, with the rear transaxle of the old car replaced by a permanent AWD system, leading from 46:54 front/rear weight distribution to 50:50 as a result.

That aggressive, exaggerated cab-backward/ultra-long bonnet silhouette that visually connected it with the SLS gives way to more-conventional and practical coupe proportions that is striking if not especially original, since they do look quite 911-esque. Along with the longer wheelbase and wider tracks, the result allows for two small rear seats to be fitted, while liftback cargo access remains.

Similarly, in the name of way-more usable interior packaging, Mercedes-AMG says it pushed the driving position nearly 180mm forward compared to the previous GT. Let’s see what that all looks like inside.

While the engine is the unique heart of the Vanquish, the design is the first element that grabs your attention. Even for a brand renowned for its GT cars with imposingly long bonnets, the Vanquish stands out.

That’s because the designers deliberately added 80mm of space between the front axle and the A-pillar (the front windscreen pillar) to elongate the bonnet even more for what it calls a “rakish and indulgent” profile. 

The lines flow across the length of the Vanquish, from its trademark grille to its Kamm Tail, giving it a look that is somehow simultaneously classically Aston Martin - with elements of its multiple generations of GT cars - while also being contemporary. 

Some of the modern touches are derived from Formula One, as the brand looks to leverage its racing team, with bonnet louvres to help cool the engine without unsettling the air-flow too much.

Aston Martin’s Chief Creative Officer Marek Reichman calls the Vanquish “an iconic halo model” and explained the design was deliberately pushing “beyond the expected, rational, and thoughtful.” Which sums up this dramatic piece of automotive art quite nicely.

The first impression inside is that of space, despite the falling roofline and coupe-like upsweep of the side windows and you look back. While, again, similar to a 911s, a kink at the door gives the GT a unique character.

Even larger people will appreciate the generous amounts of room up front, with space to stretch, sat in sumptuously comfy bucket seats. Note that the standard ones are better than the racier but firmer Sports versions.

The driving position is perfect, ahead of a dashboard that is very typical modern Mercedes in appearance and layout.

To that end, the tablet-style integrated touchscreen (11.9 inches) is clear, fast and intuitive once time is taken to learn it. And points are also won for the multi-configurable electronic instrumentation, that allows for a variety of screens, including track, classic and minimalist views.

The trademark turbine air vents, the quite beautiful material and trim finishes and just the general solid feel are further typical contemporary Mercedes cabin treatments, as are the excellent ventilation and ample storage options.

And while rear vision isn't great, that's what cameras are for. It's all pretty much on brand.

It is a shame, given how elevated the Mercedes-AMG engineering is underneath, that the GT’s interior look and ambience is so similar to those of a (albeit higher-spec) C-Class or GLE. It's simply not as special as some of the company’s previous sports cars.

More annoyingly, the ride is too firm and bumpy for a GT, and this has the unhappy effect of provoking random rattly trim sounds within the cabin. It’s a bit like scrunched-up cellophane. In a $420K (as tested) Merc, that’s very disappointing, especially as it can be heard over the copious amount of road and tyre noise droning through, particularly on coarser bitumen surfaces.

Further back, the rear seat is strictly two-plus-two, and nobody over 150cm tall is recommended to travel there by Mercedes itself. That sloping roofline is the culprit. That said, brief trips with a bowed head are possible, as the fixed cushions and split-folding backrests are actually surprisingly comfy. But only for short journeys. Kids should love it though, and the second row does open up the GT’s usefulness enormously.

As does a near-doubling of the AMG’s cargo capacity, jumping 146 litres to 321L with backrests erect, to a whopping 675L (+325L) in two-seater mode. The flat floor is accessed via a large electrically-operated liftback door, offering quite a large aperture for easy loading/unloading.

Having no spare wheel helps here, with a tyre inflation kit included in lieu of that.

Meanwhile, at the front, under the bonnet, things have definitely changed for the better as well.

Despite measuring nearly five metres long, the Vanquish is a surprisingly small car from a practicality perspective. Because the added wheelbase is ahead of the cabin, it remains strictly a two-seater, with no room for rear passengers.

There’s limited small item storage, too, aside from a couple of cupholders and a lidded console box. Although, on the plus side, the lack of rear seats creates room for some small shelves in case you need to store some loose items.  

It also has a surprisingly small 248-litre boot, which means limited storage for anything, including luggage, for a road trip in what would otherwise be a great road trip car.

As for the multimedia system, while not at the cutting edge (although Aston Martin will debut Apple CarPlay Ultra in its DBX model) the system works well for this type of car.

It’s unlikely too many under 25s will be grabbing this $700K luxury GT, so the fact the media system has a touchscreen and an array of physical buttons is a welcome detail.

As for the 1170-watt, 15-speaker Bowers & Wilkins sound system, it performs incredibly well, as you would probably expect. Like the car it has loads of power but excellent attention-to-detail with fantastic clarity, too.

The Vanquish sits at the top of the range for now, at least until the new Valhalla supercar arrives in Australia, and has an eye-watering starting price of $737,000.

Not only does that not include on-road costs, which will likely push the price closer to seven-figures, there’s also the plethora of options and customisation you can choose from that will add to the amount you pay.

Not that the standard specification is bad. For $700K you do get 21-inch alloy wheels, carbon ceramic brakes, 16-way adjustable sports seats, keyless ignition, a 10.2-inch touchscreen multimedia display, Apple CarPlay, Bluetooth, wireless phone charging and a 1170-watt 15-speaker Bowers & Wilkins sound system.

Of course, on top of all that you get a bespoke chassis and a unique twin-turbo V12 engine, that puts the Vanquish in the same class as the Ferrari 12Cilindri, which starts at $803,500 - making the Aston Martin look competitive. 

There’s a plaque signifying which engineer “handcrafted” the GT’s engine – in this case, the famous M177 in 3982cc, 4.0-litre twin-turbo intercooled V8 petrol guise.

Delivering 430kW of power at 6500rpm and 800Nm of torque from 2500-4500rpm, it sends drive to all four wheels via a nine-speed multi-clutch transmission (dubbed MCT in AMG-speak), catapulting the GT63 4Matic+ from 0-100km/h in just 3.2 seconds, on the way to a top speed of 315km/h.

How does it do that?

With AWD, the GT is now nearly 15 per cent heavier than before, but it still manages a punchy 218kW/tonne. Active aerodynamics over, inside and under a more-rigid body structure also helps.

The AMG 4Matic+ AWD system goes from 50/50 front/rear, to 100 per cent rear, variable torque distribution according to conditions and settings, and backed up by an electronic limited-slip differential. Among the many driving settings are Race Start, Drift Mode and good-old Comfort, if it all becomes too much.

Also keeping all that performance in check is a high-performance composite brake setup with improved cooling for faster responses.

Interlinked active roll bars improve body control, the five-link independent suspension features adaptive dampers for a softer ride.

And, as for that 4WS tech, the rear wheels steer opposite to the fronts at up to 100km/h (by some 2.5 degrees) for tighter and tidier handling, or 0.7 degrees in the same direction above 100, for greater stability and road-holding.

Its effect on the way this near-two-tonne coupe zigs and zags around corners is something you need to experience to really appreciate.

The engine is undoubtedly the star attraction of the Vanquish, with the twin-turbo 5.2-litre V12 being the last of its kind in the British brand’s line-up now that the DB12 has switched to an AMG-sourced twin-turbo V8. 

While that engine is arguably better with its excellent performance, smaller dimensions and lighter weight, the fact remains that for many of Aston Martin’s long-time buyers, it’s V12 or nothing.

It also helps that the V12 produces an extremely potent 614kW and 1000Nm, which is way ahead of the 611kW/678Nm the Ferrari 12Cilindri makes. So you get bragging rights at the golf club with your Ferrari mates.

The engine features a unique titanium exhaust and is paired with an eight-speed automatic transaxle that drives the rear wheels.

That is enough to propel the Vanquish to a top speed of 345km/h, making it the fastest production car the brand has ever produced, with a 3.3 second 0-100km/h time.

Actually, the GT’s economy isn’t horrendous considering how fast it can go.

Even blasting a few times around beckoning country roads, we managed an indicated 13.0L/100km, which is an improvement on what Mercedes-AMG says the GT averages the 14.6L/100km average that Mercedes-AMG officially states.

That translates to a carbon dioxide emissions rating of 334g/km.

Using 98 RON premium unleaded petrol, an average of just under 480km between refills of the 70L tank is possible. The urban run sees consumption rocket to 21.8L/100km (for just 321km of range), or 10.4 out on the highway run, meaning that over 670km is possible should you decide to drive in a docile manner.

To say the Vanquish isn’t the most fuel frugal vehicle on the market is an obvious statement, but even its claimed 13.7L/100km is best described as optimistic.

That’s not surprising given its size and performance, but with an 82-litre fuel tank that’s a driving range of less than 600km, at best.

In the real world, during our time in the Vanquish, the car’s trip computer was indicating that we stayed in the high teens; although that featured limited freeway/extra-urban driving.

Nobody will drive the GT63 4Matic+ and think, ‘Oh, this is OK’, because its breadth of performance is phenomenal.

No matter which mode you're in, from Comfort through to track-tuned Race, the Mercedes-AMG blends forceful pace and commanding control without ever breaking a sweat.

Flex your right foot and the two-tonne coupe bounds into action like a giant on a mission, striding past posted speed limit signs in nanoseconds and way, way faster than the law will stand if diligence isn’t exercised.

And there’s no point relying on seat-of-your-pants sensations, either, because the chassis below embraces the road with an almost zealous devotion. Which is astounding, given how agile the four-wheel steering-enhanced handling is.

The 63’s super power is exactly that – it dulls your sense of speed. One tester admitted to exceeding 150km/h before noticing. An odd confession considering the sonic boombox that is the bi-turbo V8’s howl.

But jailbait performance is not even the 63’s most lingering joy. That would be its steering perfection, that delivers that rare trifecta of keenness, crispness and communication. The wheel feels eager and alive in your hands, even when powering between tight turns, backed up by sensational grip and control. How can a two-tonne GT handle so sharply?

Warm, dry roads were the order of the day, so we can’t tell you how the 4Matic+ permanent AWD system deals with wet or slippery surfaces, but the slick multi-clutch transmission, seamless torque-vectoring tech and sticky tyres more than cope with the 63’s formidable outputs.

So, that's the gushing part out the way, then.

Despite the adaptive dampers, rigid architecture and exquisitely sophisticated suspension, the ride is simply too stiff in Comfort mode, and downright jittery on some of the Tasmanian roads we tested on, for the 63 to be considered a true luxury grand tourer. It just isn't comfortable, luxurious or supple enough.

Plus, grippy as they are, the 21-inch wheels transmit too much road and tyre noise through to the cabin, meaning that the GT isn't as quiet as you'd hope. Add the aforementioned trim squeaks, and the expected cocooned silence isn’t always there.

The upshot is that the 63 possesses more of a sports car character than a luxury GT character. Great news if you're a 911 type buyer and are seeking a high-performance 2+2 alternative, but a disappointment if comfort and refinement are priorities.

Still, it is impossible not to be deeply moved by this Mercedes-AMG.

As cars go, few can match what the Vanquish offers. Even in my 20+ years of driving every type of car imaginable, the Vanquish stands out as being something distinct, bold and special.

Sitting behind the wheel, the bonnet looks like it stretches out to the horizon and you feel like you’re sitting on the back axle of the car. And yet, when you start driving, the Vanquish feels like it shrinks around you.

At normal speeds it feels like a classic grand tourer, relaxed, refined and easy to drive. Obviously it's a firmer ride than your average luxury car, but that’s a small price to pay for the breadth of capability this car offers. 

Because once you get out of the urban environment, the Vanquish becomes something else entirely. On a winding road this British beast is surprisingly agile for such a big car.

The steering feels direct and the front end responds with much more precision and poise than you should reasonably expect from a car with such an exaggerated bonnet.

No, it doesn’t have the dynamic aggression the more compact Vantage offers, but it manages to take elements of that car and combine it with the GT nature of the DB12 to give you the best of both Aston Martin’s coupes.

Of course, the catch is it’s much too fast for Australian roads and isn’t really designed to be a track day car, so in Australia - without autobahns or more liberal views on speeding - the Vanquish in many respects doesn’t make sense.

But that is arguably its driving essence, you buy it because you know what it’s capable of, even if you’ll rarely use it, and that is an absolute luxury.

There’s no ANCAP rating given the extreme low-volume nature of the Vanquish. However, it does come with complete airbag coverage for both occupants and a laundry list of safety acronyms.

These include autonomous emergency braking (AEB), forward collision warning (FCW), adaptive cruise control (ACC), traffic sign recognition (TSR), lane keep assist (LKA), lane departure warning (LDW), blind spot assist (BSA) and rear cross-traffic assist (RCTA).

In addition there’s driver attention assist, to make sure you stay alert in such an expensive machine, and door exit assist, so you don’t open the long doors into a passing car or cyclist.

Importantly, none of these systems are intrusive or annoying, so credit to Aston Martin for integrating them smoothly.

What’s the GT like to own?

Mercedes-Benz offers a five-year/unlimited km warranty, with five years of roadside assistance. This is average for most mainstream and luxury brands, but superior to most sports-car makers like Porsche and Lamborghini.

Intervals are every 12 months or 20,000km, and while no capped-priced servicing is offered on the GT, pre-paid three-, four- or five-year service plans are available, ranging from $5165, $7700 and $8665 respectively.

Big performance demands big maintenance bills, it seems.

Despite the extraordinary price tag the Vanquish is covered by a very standard three-year/unlimited kilometre warranty. It’s a surprising, and some might argue disappointing, short period of coverage for a car that is not only expensive but should have a long life.

However, it does redeem itself in some way by including the first five years of servicing into the cost of the car. Ferrari offers seven for its models, so Aston Martin is still behind the market, but included servicing feels right for a car costing nearly $1 million once you put it in traffic.