Maserati MC20 vs Mercedes-Benz AMG GT

What's the difference?

With a 320km/h-plus top speed and the ability to get from rest to 100km/h in under three seconds, there’s no doubting the MC20 meets or exceeds its performance brief. But when you’re paying these prices, there must be more than just the measurable stuff going on.

And there is. The MC20 brings a big dollop of purity to the ranks of current supercars, doing away with all-wheel drive and hybrid tech and relying instead on and old-school approach in terms of handling and overall feel.

Anybody who wants to argue that call has plenty of alternatives to the MC20 from other manufacturers, and for some of us, that less-is-more thing will ring true.

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

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.

Perhaps the most striking thing about the MC20’s design is that it’s so restrained. You won’t find wings, vents, fins and diffusers all over the car, but rather an overall shape that creates downforce, rather than that job falling to tacked on additions.

And, like any modern supercar worth its salt, the MC20 is based around a carbon-fibre tub for rigidity and low weight. From that tub structure are hung aluminium front and rear subframes which, in turn, mount the suspension and other mechanical bits.

The wind tunnel still got a huge workout in the car’s development, of course, but the aim was to integrate the downforce-inducing elements rather than having them demanding your optical attention.

As a result, the whole car is an upside-down wing, if you want to simplify it. But a very pretty upside-down wing.

This gives the MC20 a smooth, sleek look that stands it apart from the rent-a-racer crowd and supports the theory that sometimes, less is, indeed, more.

Some of the detailing is lovely, too. The vents cut into the Perspex rear windscreen form Maserati’s trademark trident shape, there’s lots of visible carbon-fibre inside the door jambs, there’s lashings of Alcantara inside and the two-tone body kit breaks up the shape perfectly.

Elements we’re not so sure about include the 'Park' button mounted way down low under the dashboard, and the swing-up, scissor-type doors, which, if your more than about 180cm tall, still require you to duck under them.

On the upside, the carbon-and-leather steering wheel with its integrated controls is gorgeous to hold and gaze at.

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.

Although the MC20 has a front and rear luggage compartment, they’re both small enough to be pretty much useless. This is a shame, because as a long-weekend getaway car, the Maserati otherwise makes a strong case for itself.

The other area that suffers for the car’s art is the interior practicality. While the driving position is great and the pedals and wheel relationship is spot on, when it comes to storing anything, you’re on your own. Best the MC20 can offer is a single cupholder at the rear of the central tunnel.

The mid-engined layout also means there’s precious little vision through the back window. To counter that, Maserati has fitted the MC20 with an interior rear-view mirror that can act as a conventional mirror (you can still see only the engine) or as a screen for the rear-mounted camera.

The catch is the image projected to the 'mirror' lacks depth of field and forces the driver to refocus on the image rather than simply glance at it.

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.

Starting from $370,400 (all prices are before on-road costs), the Mercedes-AMG GT63 4Matic+ is priced and positioned as something of an eagle amongst some pretty delectable doves, given its combination of four seats, 430kW of power, 800Nm of torque and four-wheel drive.

No rival equivalents can match the Mercedes on paper. The 398kW/610Nm 911 Carrera 4 GTS T-Hybrid offers less power but starts from $400,000-plus. The 410kW/650Nm GranTurismo Trofeo begins at $450K, the 500kW/800Nm DB12 from $455K and the 404kW/470Nm Continental GT from $460K.

Only the 460kW/750Nm BMW M8 Competition comes closest to the Mercedes-AMG, from $380K.

Side note, today’s GT is only slightly more expensive than what the 450SLC was nearly half a century ago when adjusted for inflation.

And, just like with that classic old Benz, it shares much with the brand’s legendary SL convertible stablemate – including, in this case, standard all-wheel drive and active rear-axle steering… aka 4WS to select third and fourth-generation Honda Prelude owners out there.

What else does $400K-plus buy you? As you’d expect, the GT63 4Matic+ comes choc-full of standard equipment, much of it typical of the luxury coupe breed, with leather-covered and electrically operated everything.

How about a front-axle lift system with GPS-enabled memory that automatically raises the GT’s nose to help clear bumps and then remembers to do so next time?

There are climate-controlled AMG sports seats with inflatable bolstering and massaging functionality, a fixed glass roof, a head-up display, augmented-reality satellite navigation, 360-degree surround views, performance telemetry data as part of an extensive multimedia system, an 11.9-inch portrait touchscreen, 11-speaker Burmester audio, a handsfree-powered tailgate, 21-inch alloys and cutting-edge driver-assist safety tech. More on that in the Safety section below.

Then there are the myriad option packs, bumping the GT63’s price up towards $500,000. These include a $2.7K seat trim package; a $10K AMG Night Package that adds darker trim treatments (often where chrome was); an aerodynamics package with fixed spoiler replacing the standard active spoiler; a $2.6K AMG Performance Seat package; a $13K Carbon Fibre package and $13.2K Ceramic Brakes.

Now, while the new GT does ditch the previous model’s unique rear transaxle spaceframe pioneered by the gull-winged SLS of the early 2010s, the resulting longer wheelbase and shorter overhangs do provide less outlandish and more practical design.

Let’s check that out in more detail. 

Previous generations of Maseratis borrowed Ferrari (both brands were once part of the extended Fiat Chrysler family) technology for their drivelines in a deal that allowed both brands to share the cost of development.

And since having a Ferrari-built engine in your car was never seen as a sale hindrance, it was a sweet deal for Maserati. But when Ferrari was spun off and became a publicly-owned company in 2016, Maserati’s supply of engines dried up.

The solution was to take engine design in-house and the twin-turbocharged 3.0-litre V6 in the MC20 is one of the first fruits of that.

While it’s undoubtedly a high-tech powerplant, in other respects it’s fairly conventional. Maserati, for instance, has a long history with the V6 layout, and there’s no hybrid element to the driveline. Nor is there a hybrid option.

Maserati claims the V6 is the world’s most powerful six-cylinder production-car engine and, with no less than 463kW at 7500rpm and 730Nm between 3000 and 5500rpm, that’s a credible statement.

Technical details that you won’t see on most road cars include a dry-sump lubrication system (where the engine oil lives in a remote tank rather than the hot sump of the engine itself) and a sophisticated fuel injection system with two injectors per cylinder.

The real trick, however, is an ignition system with two spark plugs per cylinder. There are also effectively two combustion chambers, the first ensuring multiple flame fronts to achieve a more complete burn of the fuel in the main combustion chamber.

The rest of the driveline is similarly aimed at the purists out there; the transmission is an eight-speed dual-clutch, driving not all four wheels, but only the rears through a mechanical limited-slip differential.

Selectable drive modes from GT (the default setting) through to 'Wet', 'Sport', 'Corsa' (Track) and 'ESC Off' tailor the shift points, throttle sensitivity and suspension behaviour, but still allow for full engine power.

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.

Fuel economy is probably not going to be top of mind for most MC20 buyers, but the official combined figure of 11.6 litres per 100km is still pretty greedy by 2022 standards.

Balanced against the available performance, however, and an engine making more than 600 old-fashioned horsepower with that combined fuel-economy number is still cause to reflect on modern technology and efficiency.

The MC20 has a 60-litre fuel tank, making it a handy cross-country car for weekends away.

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.

Here’s where your half-a-million bucks has gone.

The MC20’s acceleration is absolutely shattering and is all the more amazing for the fact the car uses neither all-wheel drive grip nor hybrid torque to achieve its sprinting abilities.

While the V6 is not the most sonorous of powerplants, it does manage to sound high-end and pretty sophisticated and it’s never as shouty as some of its opposition which seem to confuse decibels with kiloWatts.

While the sheer thrust confirms the existence of two turbochargers, the lack of lag (or throttle delay) and the ability to charge into the rev limiter in the lower gears does not.

Even though power peaks at 6500rpm (as with many a modern turbo motor) the MC20 will happily smash on to the redline at 8000rpm; sometimes too happily if you don’t have your finger over the upshift paddle. As with other good modern turbocharged units, this one doesn’t actually feel overtly turbocharged.

The transmission shifts relatively smoothly in GT mode, but as you crank up the mode selector to Sport, the shifts become very fast with an accompanying jolt through the backrest as each gear clicks home. The shifting process is fairly foolproof, although you do get full over-ride, so you need to pay attention.

Both the cars we were able to sample at Philip Island were sporting the optional carbon-ceramic braking package, and one was also fitted with the optional 'birdcage' alloy wheels which are lighter.

Each of them needed a firm shove on the pedal to slow things down, but it’s true the lighter wheels seem to be worth their almost-$3000 ask as that car required less leg-pressure for the same result.

The lack of a hybrid element to the driveline, as well as the rear-drive layout, suggests a degree of purity of purpose in the car’s design. And that’s backed up by its behaviour in the first corner.

Fundamentally, instead of just hurling it at an apex and allowing the electronics to sort it all out for you, the Maserati requires a more 'classical' technique if it’s to really shine.

It doesn’t, for instance, reward trail-braking (where you continue to brake once you’ve turned into a corner) and would much prefer you get your braking over and done with before applying any meaningful steering lock.

Ignore this, and the rear weight bias of the mid-engined layout can see the car try to yaw, with the rear end becoming light and the vehicle over-rotating (which is a spin, to you and I).

Similarly, getting on the power before you’ve actually got the MC20 turned, can unload the front end and send the front wheels ploughing (ploughing is an exaggeration, but at the speeds we’re dealing with here, even a small degree is a big deal) towards the outside of the turn.

Ultimately, then, the technique becomes a text-book case of brake, turn and then power out, at which point the MC20 reveals itself to be huge fun and incredibly fast. The only thing to deal with then is the knowledge that whatever happens next is going to happen extremely quickly.

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.

While the GT doesn’t score an ANCAP rating – probably because it’s too expensive to crash test – we’d wager that it would be above-average, given Benz’s track record as a pioneer in this field.

That’d due to the scores of active, passive and driver-assist safety features fitted, from multi-faceted autonomous emergency braking (AEB) and lane-support systems to Mercedes’ PRE-SAFE tech that anticipates a crash and then prepares the car for impact.

More specifically, the GT includes Active Lane Change/Keep Assist, adaptive high beam as part of its megapixel LED set-up, adaptive cruise control, Cross-Traffic Assist, Evasive manoeuvre support, an emergency services call-out system, 360-degree camera views, pedestrian protection bonnet and eight airbags.

In other Mercedes products of today, AEB operating parameters are 7-80km/h for vulnerable road users like pedestrians and cyclists, and from 7-250km/h for vehicle-to-vehicle, while the lane-keep support systems operate between 60-200km/h.

Finally, there are ISOFIX child-seat anchorages in the front passenger seat and two in the rear seats.

High-end cars often disappoint on the details, and the Maserati is no different here, offering just a three-year factory warranty (albeit with unlimited kilometres).

That trails even the most humble commuter cars these days, and suggests there’s still a degree of indifference from some carmakers. And, possibly, their customers.

There is, however, the option of fixed-price servicing for the MC20 with the first three years’ worth of servicing costing $4000.

Scheduled services are every 15,000km or 12 months, whichever comes first.

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.