Toyota Mirai vs Toyota Prius

What's the difference?

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 Prius can rest its weary head. The Age of the Hybrid has begun. Even though this iconic eco car might have lost its ultimate purpose to more mainstream models in the last few years, it’s still the best execution of Toyota’s hybrid tech on the market and if you can look past its divisive-as-ever looks, it’s comfortable and practical, too.

The brand’s Australian division promises the Prius will stick around in one form or another, so we’re keen to see what its next iteration will look like. Plug-in? Fully electric? Time will tell.

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.

The Prius is the very visage of economic motoring. Derided by big-engine lovers, and adored by the eco-crowd, the fact that the Prius’s wedge-shaped frame is more about function than form tells you everything you need to know about this car.

It blends with Toyota’s latest design language, the face and bodywork containing some subtle nods to other models that would launch after it, like the Corolla, Camry, and C-HR.

What always surprises me about even this top-spec Prius is its dorky ride height. For a car with such a low drag coefficient, it sits so far off the ground! The 17-inch wheels look almost out of alignment with the body in those wheelarches.

Round the back, the Prius’s integrated spoiler and glasshouse bodywork are as divisive as ever, with more extreme pointed light fittings leaning into the effect created by its boxy, rear three-quarter view and mirroring the shape of the LED headlights at the front.

Of course, this car is less about being looked at as it is about its drag coefficient of 0.24 Cd, which is one of the lowest on any production car.

Inside, things again prove divisive, with a minimalist dash, a swoopy gloss highlight piece that frames the central vents and multimedia screen, and an odd, centrally mounted dash cluster, which is a usability faux pas.

In the case of the I-Tech at least there’s a holographic display which can put up useful information to help prevent your eyes from drifting too far from the road. Still, I can’t help but feel like this whole interior ethos is futuristic for the sake of being futuristic, with a little less thought given to how practical it is, compared to the brand’s other models.

The leather-appointed trim across the wheel and soft plastics in the door and dash-topper are appreciated, and there’s attention to detail in the little ‘Prius’ logos on the vents. However, I found the dull multimedia screen to be susceptible to glare during the day, and the big integrated panel in which it sits is made from a tinny gloss plastic, which will easily to get covered in fingerprints and scratches.

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.

If nothing else, all of the Prius’s edgy design gives it plentiful interior space. Toyota granted this generation of Prius a low seating position and tall roof, which combine with the distant dash elements to make for a spacious cockpit for the front two occupants.

The seat design in the top-spec I-Tech is also cushy, reminiscent of the seats in high-spec Camrys, and I had absolutely no trouble finding a comfortable driving position. If there’s one thing to be said for the annoying, centrally mounted instruments, it’s that you don’t need to consider the position of the wheel interfering with their visibility.

The Prius’s total glasshouse grants superb visibility out the front and sides, with large wing-mirrors, too. The only downside is that integrated spoiler at the back, which makes for a distracting view out the rear mirror that I’m sure any owner will quickly become accustomed to.

Soft trims across the doors and centre console, even in the back seat, make the Prius cabin a comfortable place to be, too.

Ergonomics have not been forgotten, with the multimedia screen and climate unit having useful and easy-to-reach physical dials and toggles for all the key functions. Even changing gear is a breeze in the Prius, with its odd little rosebud-shaped shifter simply a flick of the wrist from where your arm sits.

I do wish Toyota had made better use of the large area under the climate unit, however. The front part of the centre console is exclusively for the wireless-charging bay alone, and the rest of the space is constructed from a smoothly contoured gloss-finish plastic panel. It has looks to match the Prius aesthetic, but it’s no good for storing anything other than a single phone. It would have been better to make a large bay here with a rubberised finish.

Thanks to the lack of a physical handbrake in the centre or any other buttons or functions, there are two large bottle holders with variable edges.

A huge centre-console box and large door bins round out the Prius’s front-seat storage options.

Room in the rear seat is excellent, my 182cm tall frame had stellar amounts of space for my legs and head, as the roofline continues through to that raised rear spoiler. The comfy seat trim continues, although the padding in the base is notably not as good as it is in the front.

There are some useful pockets on the backs of the front seats and a drop-down armrest with cupholders for rear passengers, too.

Finally, the awkward rear of the Prius makes for a fantastic boot capacity, one advantage this car still holds over its hybrid Toyota stablemates. Capacity for the I-Tech is a mid-size-SUV rivalling 502-litres (VDA), which easily consumed our CarsGuide test luggage set and is even bigger than the base Prius, at the cost of the space-saver spare wheel. The I-Tech only has a repair kit to go with its larger alloys.

This Toyota Prius in top-spec I-Tech form costs a whopping $45,825 before on-road costs, which is a tall order, especially given the fact that the technical advantage this car once had to help justify its price-tag has been lost to the rest of Toyota’s range.

An equivalent Corolla hybrid, even in top ZR trim, can be had from just $34,695, and even the much larger Camry in its highest hybrid SL trim is more affordable, at a suddenly cheap-looking $42,790. All three Toyotas are sourced from Japan.

Not a good start in the value battle, then, especially since those other Toyotas are not just hybrids, but great cars in their respective segments.

The Prius I-Tech’s most direct rival is the similarly shaped and sized Hyundai Ioniq Premium, which can be yours from $40,390 with competitive equipment. Hyundai is not only hunting Toyota with this car, but flexing its deep pockets by selling the Ioniq in Australia as not just a hybrid, but a PHEV and a full EV, too.

Thankfully, the I-Tech comes with some decent gear, sporting 17-inch alloy wheels, a 7.0-inch multimedia touchscreen with Apple CarPlay and Android Auto connectivity, digital radio, a 4.2-inch digital information display, a holographic head-up display, full LED lighting with auto-levelling, leather-appointed seat trim, auto dimming rear vision mirror, wireless phone charging, 10-speaker audio, and improved interior trims over the base car.

The I-Tech also scores a larger boot capacity and an improved safety suite compared to the base Prius. More on that in later sections of this review.

Is the Prius “good value” then? It's still a no, as all of this equipment can be had in bigger, more mainstream Toyota models, and far more affordable rivals. It’s a shame Toyota hasn’t brought the Prius’s cost down in the five years since this generation launched, because in today’s market it makes less sense than ever.

That said, there is a certain niche audience for this car. One that will always love its little innovations, like the fact that it has one of the lowest drag coefficients on the market, its stellar fuel-consumption number, and its claimed 40 per cent thermal efficiency.

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.

It wouldn’t be a Prius without Toyota’s signature hybrid synergy drive technology. In this most original case it consists of a 1.8-litre four-cylinder petrol engine, which uses the more thermally efficient but less powerful Atkinson combustion cycle, producing 72kW/142Nm, paired to a set of electric motors on the front axle, which can produce up to 53kW/163Nm.

Combined system output is rated by Toyota at 90kW, driving the front wheels only via a continuously variable automatic transmission (CVT). This system is the same one now also employed in the C-HR and Corolla hybrid grades.

The Prius’s electric motors source their power from an older design nickel-metal hydride battery (instead of the more modern lithium-ion setup) located under the boot floor.

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 Prius’ sandpapered hybrid drive, low drag number, weight reductions, and low-rolling-resistance tyres add up for a stellar official/combined fuel-consumption figure of just 3.4L/100km. While its signature hybrid tech might be available on other Toyota’s, it’s here where the Prius still shines, undercutting the others by almost a whole litre every 100km.

But can it live up to that promise in the real world? Over my week of what I would consider to be reasonable ‘combined’ driving conditions; with plenty of traffic, freeways, and suburban driving, the Prius returned a stellar figure of just 4.0L/100km. This is not just one of the lowest figures I have ever achieved on a test car, it is even lower than the Corolla Hybrid that I tested over a three-month period. I couldn’t get that car below 4.9L/100km, despite by best attempts.

For a true rival comparison, my week-long test of the Ioniq hybrid in 2019 had the Korean managing a fuel number of 4.6L/100km.

You need not worry about kWh energy consumption for the Prius, as its hybrid system’s software manages the state of battery charge on the fly. It will simply run the engine to charge the battery if levels drop too low, although it always feels good to make the most of the motor’s regenerative braking to keep the battery topped up.

It’s clear that the Prius is still the king of hybrid, then. At least for the time being. All Prius models have 43-litre fuel capacities and are able to consume base-grade 91RON unleaded.

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 Prius was responsible for popularising Toyota’s Hybrid Synergy Drive, and fittingly, it still feels like the best execution of the technology on the market. That instantly available torque from the electric motor is sleek, quiet, and easy. It feels as though the Prius can make more extended use of purely electric drive than not only its rivals, but all other Toyota and Lexus hybrid products.

Despite its awkward exterior looks, the ride and handling of the Prius are excellent, thanks to its robust TNGA-C underpinnings (in fact, the Prius was the car to debut this platform for Toyota). It tilts into corners nicely, despite a frumpy ride height, and deals with bumps in its stride. This is a comfortable car, and the Lexus influence here is undeniable. The steering characteristics are also smooth and responsive. I wouldn’t go so far as to say the Prius is fun to drive, but it is certainly comfortable and compliant.

What the Prius lacks is the lower, firmer, and more aggressive ride and handling characteristics of its Hyundai Ioniq rival, perhaps a telling insight into the trajectory of each brand.

These characteristics add up to an around-town driving experience that really is a breeze. It’s quiet in the cabin and at times genuinely hard to tell whether the car is using its electric motors or the engine. When it comes to bursts of acceleration, the Prius might surprise you. Using both the motor and engine in tandem, I found that the Prius can sprint from the line with an alarming urgency, more so than its Corolla sibling. With the same tech behind the accelerator pedal, it’s hard to imagine why.

Once the electric motor has reached its strictly defined limit, though, the engine breaks in with a vengeance, and this car does have an anaemic follow-through when the electric components fall to the wayside. As in other applications of this drivetrain, the 1.8-litre Atkinson-cycle petrol engine can be thrashy and noisy when a lot is asked of it.

Of course, driving in such a sporty manner is hardly the point of the Prius, and where it really excels is in that day-to-day traffic grind, where the hybrid system works largely in the background to maximise the time spent with the engine off. The best part? While you can really fall into the hybrid system’s addictive fuel-saving displays, which really encourage hypermiling, this is a set-and-forget system. You can drive the Prius like any other car, and it will be trim on fuel consumption anyway. It’s not like I was trying awfully hard to attain my weekly figure of 4.0L/100km, so I’m sure it can do better over the long term.

The Prius wears a maximum five-star ANCAP safety rating to the 2016 standards, although even in today’s market it has a great active-safety suite.

Standard modern active features on all Prius models include freeway-speed auto emergency braking with pedestrian and daytime cyclist detection, lane-keep assist with lane-departure warning, adaptive cruise control, traffic-sign recognition, and auto-high beams. Our top-spec I-Tech adds blind-spot monitoring and rear cross traffic alert, for an overall excellent suite.

All Prius varaints are also equipped with seven airbags consisting of the standard front, side, and head, as well as a driver’s knee airbag, and the standard array of electronic stability and brake controls are also present.

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.

Toyota’s range-wide warranty currently stands at five years or unlimited kilometres, which is really the accepted industry standard and matches its key Ioniq rival.

Annoyingly, however, the Prius needs to adhere to six-monthly or 10,000km service intervals. Said intervals are capped to $165 per visit for the first six visits under Toyota’s “service advantage” program, after which time you fall back to Toyota genuine servicing with significant price hikes to $221.97, and $425.47 for the next two services covering four years or 80,000km.

A year of roadside assist is included, after which time you will need to subscribe to Toyota’s program, from $89 a year.

While Toyota’s offering is on par with many, it’s hardly the cheapest or most comprehensive we’ve seen.