BMW M5 vs Toyota Mirai

What's the difference?

Let’s get one thing out of the way: the new M5 is a very good car. Considering the emissions limitations and size increase of its base model, it is an impressive bit of engineering. 

What’s trickier is deciding whether the new car is really better to drive. Less edgy but supremely comfortable and quiet; BMW leaned into the daily usability of the plug-in hybrid M5 rather than amping the petrol-electric system for maximum thrills. And do you know what? That’s fine with me. 

The new M5 still performs on road and track and does an incredible job of hiding its weight (most of the time). Perhaps the G90 is a little more Audi RS6 than F90 in its demeanour but some would argue that’s no bad thing. 

The concept of the BMW M5 is not static, it evolves with the times, and the G90 is no exception. Expect future Competition and CS variants to unlock some extra lunacy. 

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

Believe it or not, the Mirai represents a pretty big gamble for Toyota, a company who has been known in the past for being relative conservative with its vehicles.

In recent years though, with models like the GR Yaris and even the RAV4 Hybrid, it seems like Toyota is more willing to go out and take a chance on something that would not be considered a safe bet.

The Mirai represents this willingness to experiment, but it is still too early to say whether it will a winner or a failure.

It drives well, looks good and its powertrain is a potential gamechanger for electric cars in Australia, but whether hydrogen takes off locally with customers is beyond Toyota’s control and up to those willing to invest in refuelling infrastructure.

The M5’s raw size is what you notice first. The G90 M5 is a whopping 113mm longer, 67mm wider and 37mm taller than the car it replaces, with the wheelbase stretched 24mm.

It is also the most pumped M5 yet, compared to a 520i it is 70mm chubbier at its flared wheel arches. The ‘M5’ insignia on the C-pillar means you’ll know this is the fast one. 

Presence is not in question, then, but beauty? Not the right word. The G90 makes its predecessors — especially the original ‘E28’ — look demure. 

The cabin layout builds on the concept debuted by the iX electric SUV, with twin integrated screens and focus on technology and minimal buttons. Materials are mostly high quality and feel fitting for the M5’s asking price.

Remember your awkward teenage years when you were still a little uneasy in your own skin and tried to find your way in terms of your own style? (I certainly do!).

Now remember bursting on the scene in your 20s with the confidence and swagger of a Calvin Klein model after working out your niche? (I’m still waiting for this to happen).

Well, the Mirai certainly remembers because the inelegance of the first-generation car has given way to a much more confident and handsome model.

From the outside, there is no denying its Toyota-ness and from certain angles the new Mirai even looks a bit like its Camry cousin, with a bit more flair.

The split front lighting signature and massive grille direct your eye to the blue-tinged Toyota badge, which the Mirai wears proudly, while the puffed-up bonnet and lower-bumper chrome accent add a touch of sportiness and class, respectively.

Move to the profile and you will see 19-inch wheels filling the arches, as well as a sloping rear roofline and silhouette that echoes the best of the premium German sedans.

From behind, the body-wide tail-light design and subtle spoiler adds to the Mirai’s strong road presence without looking over the top, but I especially like the way the lines of the former continue down the bumper to break up the body panels.

If you can’t tell already, I'm a fan of the exterior looks of the Mirai, and I bet if the Toyota badge was swapped out for a Lexus one, no one would think it looked out of place.

Step inside the Mirai and there are familiar Toyota appointments like the way the dashboard sweeps away from the driver, as well as a shifter design lifted from a Prius.

The surfaces are all soft-touch, though, and the mix of leather and gloss-black materials combine to elevate the interior ambience.

The interior of the Mirai might not be as stunning as the exterior, but it is certainly no drab and depressing place to spend some time.

BMW has persevered with its twin-screen, minimal-button approach for its 'Operating System 8.5' in the M5. 

The 14.9-inch central touchscreen is bright, responsive and high resolution but the software remains a little strange. The main interface is classy but when looking for settings to adjust you’re presented with a Windows 95-esque panel of small square touch targets. It’s not intuitive. 

Wirelessly mirroring Apple CarPlay or Android Auto works a treat, at least. Digital climate controls keep temp adjustment persistently on screen and a shortcut to fan speed. The nipple-like vent direction adjustment grows on you, as do the digital vent sliders. 

The 12.3-inch digital driver’s display still doesn’t have the freedom of customisation and clarity of Audi’s interface. 

The M5 has two cupholders, a deep central storage cubby, door bins that swallow two 600mL plastic bottles and twin wireless charging pad that resolutely grips smartphones even under the sort of tummy-churning G-Forces this M5 can manage. 

Setting the M5 apart from the regular sedan is a unique centre console bunching 'M Drive' modes, 'M Hybrid' modes and other shortcut functions together next to the gear toggle and M-engraved crystal 'iDrive' controller.

Comfortable front seats are power adjustable with in/out, up/down lumbar support and have two memory positions. 

The 5096mm long M5’s back seat is very spacious. Headroom is good for those beyond 182cm (six-foot), the bench is extremely supportive, while leg and toe room are adequate.

A fold-down centre armrest has two cupholders and there are USB-C charge ports in the back of each bucket seat for a total of four. 

You can buy an accessory mount that holds tablets or smartphones for rear seat passenger entertainment, too.

When you look in the boot, BMW offering a Touring version of the latest M5 makes even more sense. The load aperture is big but the usable space is narrow; the sides intrude on load space. 

The 466-litre space will make fitting suitcases for an airport run tricky and, even with the 40/60 split-fold rear bench, you will struggle to fit a bike in the back. There’s no spare tyre, either.

Measuring 4975mm long, 1885mm wide, 1470mm tall and with a 2920mm wheelbase, the second-generation Mirai is comparable in size to a mid-size sedan like the Camry and Mazda6.

However, it is a little longer, wider and lower, with an elongated wheelbase, and is in fact larger in all dimensions (save for height) than a Honda Odyssey people mover!

You’d think this would afford passengers heaps of room, but all the whizz-bang cutting-edge technology has to go somewhere.

Based on Toyota's new GA-L platform, the second-generation Mirai is fitted with three hydrogen tanks – two smaller ones positioned laterally behind the rear seats and one large one mounted longitudinally where a traditional transmission would sit.

What this means is that rear seat room is compromised, and the hydrogen tank eats into the middle seat’s legroom so much that the new Mirai might as well be a four-seater.

Leg- and shoulder-room in the second row are adequate, but the sloping roofline means it can be hard for taller passengers to get comfortable. I'm 184cm (6'0") and had trouble.

Move to the front seats though, and it’s a different story with comfortable and supportive seats offering plenty of adjustability for drivers/passengers of any size.

Storage options are also ample, with a door pockets, a centre storage bin, two cupholders and a tray for your phone/wallet.

Opening the boot reveals a cavity large enough for just 272 litres (VDA) of volume – less than the smaller-sized Corolla sedan (470L) and well-down on the similarly-sized Camry (524L).

Like the rear seats, boot space is compromised by powertrain components, the culprit being the battery and electric drive motor found above the rear axle.

The rear seats in the Mirai are also fixed, which means they won’t fold down to open up more volume.

With only 20 examples available in Australia, and none offered to the public to buy, it’s hard to judge exactly how much value you get with the car.

Toyota has released pricing, though, sort of.

The 20 units are available to organisations who might want to trial the hydrogen powertrain, costing $63,000 for a three-year lease.

The cost of refuelling over that period is included in the price, too, but Toyota is restricting the lease to Victorian organisations as its Altona refuelling station in Melbourne’s west.

The Mirai comes fitted with LED exterior lighting, rain-sensing wipers, auto-folding and heated exterior mirrors, 19-inch alloy wheels, rear privacy glass, synthetic leather interior, leather-wrapped multi-function steering wheel, power-adjustable front seats, dual-zone climate control, keyless entry and push-button start.

Handling multimedia duties is a 12.3-inch touchscreen system with satellite navigation, digital radio, Bluetooth connectivity, Apple CarPlay/Android Auto functionality and a 14-speaker JBL sound system.

There's no wireless smartphone charger, though, which is a big miss in our book for a car that is so future focused.

No doubt the bulk of the cost of the car is due to its cutting-edge powertrain (which we will cover further below), but the levels of equipment would be on par with high-end mid-size sedans like the $46,990 before on-road costs Camry SL Hybrid, $51,390 Mazda6 Atenza and $50,990 Hyundai Sonata N Line.

It's also hard to compare the Mirai against Hyundai's Nexo hydrogen SUV, which has no pricetag in Australia but its Korean price can be converted to around $A84,000.

Unlike the Mercedes-AMG C63, BMW has kept the M5’s eight-cylinder heart and this has proven to be a good decision. 

The 4.4-litre twin-turbo petrol engine has been optimised with “a cross-bank exhaust manifold and optimised oil separation”, says BMW.

The V8 spins to 7200rpm though it isn't a screamer, outputting a full-bodied 430kW (5600-6500rpm) and 750Nm (1800-5400rpm).

Augmented with a transmission-mounted 145kW electric motor that can produce up to 450Nm, thanks to pre-gearing, maximum combined outputs are 535kW and 1000Nm. 

Weight blunts punch, though, so despite nearly 100kW and 250Nm more, the new M5 is a tenth slower to 100km/h than its predecessor (claimed), at 3.5 seconds for the sprint.

You can thank a 220kW/tonne power-to-weight ratio, worse than the old car's 233kW/tonne figure. The new G90 claws some time back with brute force, hitting 200km/h in just 10.9 seconds and goes on to a limited top speed of 305km/h.

You can choose from five powertrain settings, starting with 'Electric' and 'Hybrid' for everyday use, while 'eControl' lets you store battery power for urban use.

'Dynamic' provides the best balance, says BMW, while 'Dynamic Plus' is like a qualifying mode. Think maximum combined punch for up to 10 minutes, at which point you’ll have drained the battery. 

Driving in pure electric mode, the take-off can be a little jerky but the quietude and decent power make it pleasant. Power sources are combined expertly in Hybrid and giving it some stick in Dynamic is more than enough to make your passengers feel queasy.

What even is a hydrogen fuel-cell electric vehicle? Well, we're not scientists but the way we understand it is that there is a special component in FCEVs - the fuel cell - which combines incoming air with hydrogen to produce electricity, with the only bi-product being water.

The single electric motor driving the rear wheels of the Mirai outputs 134kW/300Nm, which enables a 0-100km/h acceleration time of 9.2 seconds in the 1900kg sedan.

Top speed is also pegged at 175km/h – or well and truly above the road-legal limit – and the electric motor is paired with a single-speed auto transmission.

Performance may seem underwhelming, especially when mainstream electric cars like the Nissan Leaf and Hyundai Kona Electric can hit triple digits in a much faster 7.9s time, but the Mirai is designed for efficiency and smoothness, not performance.

Hyundai's Nexo meanwhile, makes 120kW/395Nm from its electric motor.

Electric-only range is rated up to 69km in WLTP testing, but the 18.6kWh battery is more likely to give you around 60km in real-world driving. It can be topped up in about two hours using an 11kW AC charger, or overnight on a three-pin socket. 

BMW includes both Mode 3 (public) and Mode 2 (home) charging cables with the M5. 

The M5 uses 3.2L/100km of 98 RON premium unleaded in ADR testing, corresponding to just 72g/km of CO2, so it should sail through the first rounds of Australian emissions regulations. 

Indulging in what the V8 has to offer sees that consumption spike, though. An enthusiastic road drive saw the M5 gulp 12.4L/100km, according to the trip computer.

Official consumption figures for the Mirai are published at a combined 0.7kg of hydrogen per 100km… which doesn’t really mean much without a frame of reference.

The 2021 Mirai is fitted with three hydrogen for a combined capacity of 5.6kg (or 141 litres) that enables a driving range of 650km when tested on the WLTP (Worldwide harmonized Light vehicles Test Procedure) standards.

Okay so a 650km range is pretty good and comparable to diesel SUVs of a similar size, but that’s moot if refuelling costs more.

Because hydrogen refuellers are not yet readily available, the cost of refuelling is still a little unclear, but Toyota has said it works out to be around $70-80 to fully refuel the second-generation Mirai, making it comparable to filling up a petrol or diesel car.

The new-generation car also features three hydrogen tanks instead of two, which means during range is up 30 per cent compared to the first-generation Mirai.

Meanwhile, the Hyundai Nexo features a 6.33kg hydrogen tank, enough to propel it around 666km before needing a refuel.

The three M5 elements start with daily usability. We trundled out of Bathurst in electric mode, with the adaptive dampers (and other myriad settings) in Comfort. 

The M5 has steel springs, double wishbone front suspension and a five-link rear axle, all of which has been heavily reworked by the boffins at M. Naturally, the ride is firm, though in Comfort the body moves through its motions smoothly. 

The M5 is an effortless tourer, its eight-speed automatic shmoozing through ratios as it climbs and descends steep gradients. Wind and tyre noise insulation is good on coarse chip tarmac, though a bit more burble from the V8 would be appreciated. 

The M5 has nine adjustable parameters to wake it up: 'Drivetrain', 'Energy Recovery', 'Drivelogic' (gear shift aggression), 'Chassis', 'Steering', 'Brake', 'M xDrive', stability control settings and 'M Sound'. Favourite settings can be stored to the wheel-mounted M1 and M2 buttons. 

With the dampers still in Comfort the M5 remains fantastically capable with power delivery from the xDrive mighty rewarding on corner exit. Sport dampers sharpen the experience up further, amplifying the M5’s surprising agility. Thank the rear-wheel steer for this big sedan’s switchback performance. 

Step beyond the limit of grip, brake too late, or get on the power too early, though, and the M5’s mass reveals itself rapidly. It doesn’t help that the accurate steering is devoid of feel. The brake-by-wire pedal is too numb and light, as well, making it tricky to judge grip levels on the road.

Feel is less of an issue on a dry Mount Panorama circuit, where the M5 turns out to be a total pussycat. The all-wheel drive, consistent dynamics, strong brakes and well-tuned stability control make for an approachable but seriously fast sedan.

The responsive transmission will hold gears to redline and is eager on the downshift in its most aggressive setting while tactile shift paddles make commanding ratio changes yourself that bit more engaging. 

Prodigious punch out of corners is matched by the impressive consistency of the carbon ceramic brakes. The M5 pulled up for The Chase every time with minimal fuss, even from above 250km/h.

Similar credit goes to the 285mm front and 295mm rear Hankook S1 Evo tyres which remained consistent and predictable all day despite reaching temperatures over 130 degrees, according to the tyre pressure monitor.

Toyota is positioning hydrogen as a potential future fuel source that is – crucially – sustainable and eco-friendly, which means the Mirai has a lot riding on its shoulders.

And behind the wheel the new-generation Mirai drives just fine.

The Mirai uses hydrogen to create electricity to drive its wheels, which means it feels very much like a battery electric car from the driver’s seat.

That’s not necessarily a bad thing, but keep in mind Toyota’s potentially revolutionary drivetrain won’t feel so revolutionary behind the wheel.

Like all EVs, torque is available instantaneously for a quick and peppy pick-up off the line, but the Mirai won’t demolish the 0-100km/h sprint like the Porsche Taycan or Telsa Model S.

Designed for efficiency rather than pace, the Mirai will accelerate briskly to 60km/h, but takes 9.2s to hit 100km/h – not that we got to test the latter in the extremely short drive loop in Melbourne’s West.

Despite tipping the scales at over 1900kg, the Mirai’s ride is soft, supple and extremely compliant, almost to a fault.

Steering feels light and effortless, while 19-inch wheels do nothing to upset the serene and comfortable interior ambience – it’s seriously good enough to be a Lexus.

What’s so striking about driving the Mirai though, is how much it could appeal to motorists who travel long distances (as is often the case in Australia) and can’t afford the sometimes 10 hours required to recharge a battery electric vehicle.

Refuelling the Mirai is as quick and easy as a conventional petrol or diesel car. Australia just needs more hydrogen stations to make use of the technology and open up electrification to those that may not have considered it (or deemed it unfeasible for their needs) in the past.

The 2021 Toyota Mirai has not been crash tested in Australia or in Europe, and as such does not carry an assessment rating from ANCAP or Euro NCAP.

However, Toyota has fitted its hydrogen-powered sedan with its 'Safety Sense' suite, which includes autonomous emergency braking (AEB) with pedestrian and cyclist detection, adaptive cruise control, lane-keep assist, lane departure warning, automatic high beam and traffic sign recognition.

Other features include blind-spot monitoring, rear cross-traffic alert, seven airbags, surround-view monitor and rear-seat ISOFIX anchorage points.

The Mirai’s hydrogen tanks are also stronger than before thanks to a new multi-layer construction.

In Australia, BMW has moved to match other manufacturers in offering a five-year/unlimited kilometre warranty on all its cars. 

Servicing is recommended on a condition basis, with the M5’s multimedia system prompting a visit to the mechanics. BMW offers pre-paid service packs for five years/80,000km at a price of $5059 for the basic offer and $8152 for 'Inclusive Plus', which covers brake pad and rotor replacements. 

It is expensive next to a regular 5 Series but when you consider the purchase price and performance level, the M5’s service pricing is not astronomical. 

Unlike new Toyotas on sale now, the Mirai does not come with a warranty because is only available on a three-year/60,000km lease.

There are servicing costs though, with Toyota charging a one-off $2693 fee for maintenance of the Mirai over that lease period.

Scheduled service periods are every 12 months/15,000km, whichever occurs first, though it is unlikely every Toyota dealership will ultimately be able to service the Mirai.