BMW M4 vs Maserati MC20

What's the difference?

We cannot think of a faster or more invigorating four-seater luxury convertible for the money than the new M4 Competition.

Finally, after years of devastatingly fast droptops with remote steering and an unforgiving ride, the G83 generation discovers refinement and sophistication to go with its supersonic speed.

There’s terrific talent on tap here that no rival can even come close to right now. BMW is on a roll and this is the first M4 convertible that can sit proudly alongside the best of its classic M3 ancestors.

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.

Hallelujah! The unloved folding hardtop is history and fabric is back in fashion in a BMW 3/4 Series-based convertible for the first time since the demise of the E46 convertible in 2006.

It improves the proportions and aesthetics out of sight while remaining superbly insulated. It’s also 40 per cent lighter to boot while liberating 80 litres of extra luggage space.

The roof requires just 18 seconds to drop away or erect again, and can be done so at speeds of up to 50km/h. And it looks great, with a taut fit that suits the BMW’s lithe lines to a tee. With all four windows dropped, it also does a fab impression of an American-style pillarless hardtop.

Roof up or down, the M4’s muscular styling has a tense sparseness to it that means business, reinforced by that oversized, M-specific kidney grille treatment that, admittedly, isn’t as divisive in real life. The smiley LED light wave out back also brings a friendlier tone, harmonising handsomely with the rest of the car.

This is probably the best-looking BMW convertible since the beautiful E46 era.

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.

The M4 Convertible is not a paragon of space efficiency, given its footprint.

At nearly 4.8 metres long and 1.9m wide, the M4 Convertible casts a sizeable shadow on the road, which only really pays dividends for front-seat occupants inside.

Ours was fitted with a very handsome pair of $7500, two-tone M Carbon bucket seats up front, a sort of futuristic tombstone design with a fixed headrest that looks like they were created by and for Stormtroopers; they do provide all the electronic adjustability one would need in terms of fore/aft, up/down and lumbar support movement.

But, unless you really need their g-force-bracing support and love their outrageous appearance, they are monumentally obstructive to effortless entry/egress and overall hip comfort if you don’t possess a gymnast’s physique. In fact, at times, they can feel downright torturous, especially in the gusset area due to the pointless (ironically) hard central bulge bit. The standard front seat set-up is perfectly fine, offering all the comfort and support expected in a luxury convertible, with the added bonus of headrest adjustability.

As with all G20/G80 generation 3/4 Series, the M4’s interior is a welcome return to form for BMW, from the excellent driving position and superb build quality, to thoughtful switchgear placement, brilliant ventilation and ample storage. And iDrive is probably the best and most intuitive multimedia system out there, too, needing no special skill or distraction once mastered.

A quick note about the instrumentation. The 4 Series design digital readouts are prettier than the standard 3 Series' ugly standard screen that looks ex-Honda Civic. This one offers alternative views and is easy to read at a glance. But it still makes us pine for good old analogue dials. Remember when BMWs were the world leaders in dial design?

Some familiarisation is also required to figure out the M part of the M4, including the various driving and performance modes; they’re divided into Road, Sport and Track settings. Yet, thankfully, they’re all far simpler to get your head round than before, which required too much fiddly concentration, since – once quickly learnt – everything is possible with eyes-on-the-road promptness. A new M Mode button offers pre-determined shortcuts to whichever drive combinations are desired.

The roof is well insulated, meaning that previous-gen folding hardtop-owning prospective buyers shouldn’t be too sad about the fabric above their heads. On the go, front occupants can enjoy a variety of configurations, starting with snug coupe-style cosiness and security, moving to cool pillarless hardtop-style windows-only down cruising, to the full top-down convertible glory. The latter also brings minimal buffeting at speed unless you’re stuck out in the back. Roof-up vision isn't brilliant, though.

Strangely, with the M Carbon bucket seat options ticked, it’s actually easier for some people to get into the back than the front. Pulling a strap sees the front bucket seats (slowly) whir as far forward as possible to allow sufficient room for people to clamber onto the rear seats.

Once sat, it’s clear that longer-legged people will struggle. Knee room is OK (especially if the front occupants are feeling sympathetic by moving their seats forward), there’s surprisingly adequate head room for your 178cm tester when slightly slouched, big feet can be tucked beneath the front seats and scalps never have to touch the rear glass thankfully.

And at least BMW has tried to make life back there comfier for smaller people, due to rear-facing air vents with climate and directional control, two USB-C ports, a pair of cupholders, a centre armrest and some handy storage. The materials are of a high quality construction, too.

However, the fixed back rest is far too upright, the knees-up posture quickly gets tiresome, the cushion is firm and you’re sat on a slight angle pointing outwards. Claustrophobics won't be too happy either. Annoyingly there aren’t side window buttons either, meaning only the driver can lower or raise them. The two-seater back seat is best saved for short trips or kids.

Happily, once the roof is dropped, the hemmed-in feel vanishes, there’s not too much wind intrusion or buffeting with the side windows up and there’s a sense of shared freedom that only a four-seater convertible can bring. Going the full drop-top experience will ruffle more than hairdos at freeway speeds, though. An optional wind deflector can fix that issue for front-seat occupants, but it goes over the back seats, turning the M4 into a two-seater ragtop.

Further back, the 300-litre boot isn’t accessible from the cabin, meaning you can’t put much inside at all. BMW fits a hinged flap that needs to be down for the roof to work since it cordons off the roof storage part of the boot when folded in; when lifted, there’s a useful amount of space for luggage, and it’s a handy rectangular shape instead of an L-shaped slot, but obviously at the cost of convertible driving. You can’t have both.

Note that, compared to the previous folding-hardtop M4, this boot is some 80L larger. 

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.

Maserati has followed the lead of many a high-end carmaker by using the options list to ramp up the profitability of the MC20. Of course, that’s after the MSRP of $438,000 has been dealt with by your accountant.

The point is that you kind of need to suspend disbelief when it comes to supercars and their value-for-money credentials. By any sane, conventional measure, they’re seriously over-priced, but within its peer group, the Maserati is neither the cheapest nor the most expensive way to go this fast.

But back to those options: Again, it’s all a case of throwing away what you think you know, because there are several options for the Maserati that cost more than a good, brand-new hatchback.

The carbon-fibre engine cover alone will cost you a staggering $13,164, and according to Maserati management, it’s a popular option.

Then, there are the carbon-fibre brakes which not only cost $28,961, but if you want the yellow-painted calipers, that’ll be another $2962.

The hydraulic front-lifter which allows you to deal with driveways and speed humps is a monstrous $8721, but at least there’s some engineering in that. Unlike the black-roof option which is, er, a black roof at $10,202. And the external carbon-fibre kit? A cool $92,806!

Here is a summary of Australian-market outputs and prices for the M3 and M4 convertible autos, with the prices in brackets being approximate inflation-adjusted figures for today.

1999 E36: 236kW/350Nm 3.2L in-line six-cylinder engine (I6), $152,000 ($266,000 in 2022); 2003 E46: 252kW/365Nm 3.2L I6, $158,000 ($240,000); 2008 E93: 309kW/400Nm 4.0L V8, $183,442 ($240,000); 2014 F83: 317kW/550Nm 3.0L twin-turbo I6, $178,430 ($202,000).  

In 2022, the G83 M4 Competition lives up to its name in more ways than one, with a 2993cc 3.0-litre double overhead cam direct-injection twin-turbo I6 known as the S58 series, which is itself derived from BMW’s B58 modular family of engines. Its 375kW is delivered at a lofty 6250rpm, while there’s a 650Nm plateau of torque between 2750rpm and 5500rpm.

A kerb weight of 1920kg means the M4’s power to weight ratio is an impressive 195.3kW/tonne, helping its published 0-100km/h time of 3.7s. For a few grand extra, the company will up the top speed by 30km/h, to 280km/h.

BMW says the engine includes cooling and oil supply systems designed for extreme lateral forces at high speeds, while the exhaust uses electrically controlled flaps for a more raucous noise.

Power is channelled to all four wheels continuously via an eight-speed M Steptronic transmission with a trio of shift programs. The AWD system features an active differential to better transmit torque to all four wheels, while drivers can choose one of three, progressively more rear-wheel drive (RWD) biased modes: 4WD, 4WD Sport and 2WD – the latter being a pure RWD set-up.

Other related changes the M4 boasts over regular 4 Series models include special stability and traction control tuning, a double-joint spring strut front axle with unique axle geometry and variable-ratio steering, a five-link rear axle featuring its own kinematics and elastokinematics, M-specific adaptive dampers, a configurable braking set-up according to feel and response, and forged M light-alloy 19-inch alloys up front and 20-inch items out back.

Choosing the AWD-only convertible over the equivalent AWD coupe adds 145kg (and 195kg compared to the RWD coupe), though this is partly offset in two ways over the preceding, folding-hardtop M4 Convertible: firstly, using the soft top drops weight by 80kg; and secondly, while the AWD system does add 50kg, it’s at a lower centre of gravity, thus naturally improving vehicle dynamics.

Which are electrifying, by the way.

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.

We managed 12.1 litres per 100km in a mixture of urban, freeway and rural-road driving, including plenty of performance testing. This is a two-tonne M4 convertible capable of supercar speeds, after all. In that context, the economy is more than acceptable. No doubt the stop/start engine function (at idle) helps here.

For the record, the official combined-average claim for this Euro 6-rated BMW is 10.4L/100km, for a carbon dioxide emissions average of 237 grams/km. Thanks to a fuel tank that holds 59 litres of 98 RON premium unleaded petrol, it can manage an average of almost 570km between refills.

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.

Marvellously.

Earlier, we said that the previous M4 (and some earlier M3 generations) never hit the dizzy heights the best like the E46 managed.

The reason why is bandwidth. Not WiFi bandwidth, but rather the newfound breadth of capability that the G83 model has acquired.

Yes, while even the slowest examples of previous M3s and M4s remained thrilling, with blisteringly potent acceleration accompanied by a soaring exhaust soundtrack, the post-E46 models seemed to become almost too obsessed with the pursuit of performance. Thunderous V8s and twin-turbo V6s are all good and well, especially when they provide explosive responses, but there’s more to sports cars than sheer bloody-minded speed.

More specifically, though the handling and roadholding were outstanding, the previous M4’s steering didn’t feel as connected or one with the driver, instead seeming a little remote and detached. Conversely, even with adaptive dampers on offer, the suspension (on Australian roads) lacked sufficient isolation from bumps and thumps, and so was never settled or calm. It was all too nervous and edgy, like a drug-addled athlete who’s indulged in too much partying.

Thankfully, the curse is broken with the latest iteration, even in the heaviest and slowest version like our M4 Convertible as tested, pushing out boundaries to thrilling effect once more.

With the newly-simplified and logically presented M performance modes only a push of a button away, the driver now no-longer has to concentrate on what setting they’re in, and instead just immerse themselves in the experience of accelerating, steering, cornering, braking and controlling this incredible sports convertible.

Tremendously strong in regular Road mode, the M4’s performance certainly lives up to the legend, stepping up into the supercar realm when Sport or Track are chosen, hunkering down as it thrusts towards the horizon with relentless speed and determination, accompanied by the gorgeous twin-turbo six’s revs as they soar towards the red line. The ultra-alert eight-speed auto’s operation is equally seamless, displaying uncanny intuition in its selection of the right ratio at exactly the right time.

These are all incremental improvements over what has come before. But what’s really changed is how rock-solid the BMW feels as it belts along at speed, magnetised to the motorway regardless of weather, its new AWD engineering keeping everything steady and planted. No more tetchiness to unnerve the driver.

Which makes the feel and fluency of the chassis even more remarkable, given that now all four wheels are driven. The very opposite of leaden or inert, the superbly weighted steering is instead light and alive in your palms, as you carve through corners with pin-point precision. Some might find it a bit too eager to change direction at first, but we reckon BMW has judged the balance just right. Its sheer agility is as life-affirming for driving enthusiasts as it is immersive. Bravo, BMW.

With so much grip and control, this is not to say that the driver can’t hang the M4’s tail out every-which-way, since the chassis set-up allows for progressive oversteer, even in Road mode, along with as much drifting as your courage allows where safe. As with the best sports cars, the M4 is as steerable from the seat of your pants as it is using the throttle.

Finally, there’s the M Adaptive chassis tune, that at long last broadens the M4’s repertoire from motorway grand tourer and rural-road blaster to city slicker and urban warrior, thanks to the suspension’s ability to better-absorb a much wider array of terrible road surfaces. Comfort now lives up to its name, with the ride – though still firm – no longer hard or crashy around town, ushering in a new level of civility that won’t fatigue or aggravate you or your occupants. We're so happy to report this progress.

One area where BMW might want to keep improving, though, is the abundance of road noise intrusion over certain coarse chip bitumen. While easily muffled by the sweet sounds of the twin-turbo six, banging audio system or dropping the roof, it now seems more obvious that the rest of the car has smartened up so much.

A small fly in an otherwise hugely satisfying ointment.

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.

Neither ANCAP nor Euro NCAP have tested the MC20 for crash safety, so we can’t give it a star rating.

But the lack of standard safety gear such as rear-cross traffic alert and blind-spot monitoring (it’s optional at $2797) can’t go unmentioned. That’s especially concerning when you consider the mid-engined layout makes for very poor rear visibility.

We feel here is where the company drops the ball.

Trailing all of its main luxury car rivals (except Porsche) by two years, BMW only offers a three-year/unlimited kilometre warranty, as well as three years of roadside assistance.

BMW says its vehicles’ servicing is condition-based, depending on how they’re driven and other factors, with a dash warning appearing to let the driver/owner know when it’s time. We advise servicing your M4 annually or at every 10,000km, just to be sure.

No capped-price servicing system is offered. However, as long as the first one is paid for before the first service on a new vehicle, the ‘BMW Service Inclusive Basic packages’ is available at extra cost, covering scheduled servicing for three years/40,000km or five years/80,000km.

No prices are published for M models like the M4, but a normal 4 Series costs from $1800 for the five-year/80.000km package. You can bet an M4’s will cost more.

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.