MG Im5 vs Subaru BRZ

What's the difference?

The MG IM5 Performance is fast, comfortable, quiet and super refined. Putting some minor spec and active safety niggles to one side, it offers the features, tech and price to match it with its well-credentialled and already popular mid-size EV sedan competitors. Is there room for one more? We think there should be.

Just in case you haven’t figured it out, we’re deeply in love with the BRZ tS. It’s a sublime beauty with a tantalising breadth of talent, while still being affordable and practical enough as an everyday run-around.

And, yep, even with the auto, the BRZ tS is its own and very special thing. Do it before coupes die out completely. 

Playing spot the straight line on the outside of the MG IM5 is like an automotive design version of Where’s Wally? There aren’t many, in the midst of an unrelentingly curvaceous exterior treatment.

At close to five metres long and two metres wide the IM5 is appreciably longer (+211mm), a little wider (+27mm) and a bit taller (+33mm) than a Tesla Model 3. Think BMW 5 Series in terms of overall size.

And the soft-form shape is functional; the swoopy liftback boasting an ultra-slick 0.24 drag coefficient.

That said, I’m not convinced by the ‘Periscopic’ cameras informing the driver assistance systems from the front guards. They scream tacked-on afterthought. But a touch-only initial opening function for the flush door handles is cool and makes life easier.

The curves continue inside with soft-padded surfaces around the dash and doors, but the straight edge obviously came out for the 10.5-inch central media screen and vast 26.3-inch upper display. There are next to no buttons; even exterior mirror adjustment is directed from the screen to a multi-function steering wheel control.

System software (powered by a Qualcomm ‘Snapdragon’ chip) is lightning fast with a two-finger up and down swipe shortcut function on the central screen for ventilation and other functions.

The interior is light and bright thanks to the enormous panoramic sunroof. It’s been fine in cooler winter conditions during this test but it could be interesting to revisit in the heat of an Aussie summer

There are two interior colour schemes available - the ‘Highland Grey’ of our test car or ‘Dover Beige’ for those brave enough to live life with the threat of scuff marks on your shiny new car’s glamorous but vulnerably light interior.

Compared to the previous model, the latest BRZ has similar proportions but has changed in a few important ways.

For instance, the body is about 50 per cent stiffer than before. The bonnet, front mudguards and roof are now aluminium, and the fuel flap is plastic. This helps bring a 4.0mm drop in the centre of gravity, which benefits handling and ride dynamics.

The BRZ is longer then the first-generation version by 25mm (at 4265mm), has a wheelbase that’s been stretched by 5.0mm (to 2575mm), is 15mm shorter (at 1310mm) and has wider rear tracks (at 1550mm), but overall width (at 1775mm) remains the same.

Being a tS, STI has fitted special badges around the car, different alloys and uprated (Brembo) brakes, amongst other things. And the changes are just as subtle inside.

There’s plenty of breathing room up front and in terms of storage one of the first things worth calling out are the long but relatively narrow door bins. No good for anything above unusually slender bottles, even if they’re lying down.

No conventional glove box in the dash, but there is a large lidded box (cooled and heated) between the seats that doubles as a centre armrest. It’s supplemented by a big stowage area underneath the flying buttress style centre console.  

There are two cupholders in the centre console as well as a wireless device charging pad in front of them with a vaguely phone-shaped oddments bin alongside it.  

Move to the rear and the IM5’s 75mm wheelbase advantage over the Tesla Model 3 is clear. Heaps of knee and headroom for me at 183cm sitting behind the driver’s seat set to my position. 

But… the seat sits low which pushes your knees up into the air to the point where my thighs are not contacting the seat cushion. Even though the rear seat reclines to a certain degree it’s a problem compounded by a chronic lack of room for your toes under the front seat. Awkward.

There are map pockets in the front seatbacks, modest bins in the doors and a fold-down centre armrest with two cupholders. Adjustable ventilation in the rear of the front centre console always makes life in the rear seat more pleasant.

The car also houses ‘Strong Magnets’ at various points around the cabin and boot, with a configurable adapter able to lock a phone or tablet into place for the entertainment of, in our case, back seaters. 

Speaking of devices for entertainment, there are two USB-C sockets and a 12-volt outlet in the front and another USB-C and 12V in the back, so charging isn’t an issue. 

The IM5 is a liftback so the boot aperture is generous and a capacity of 457 litres with the rear seats up is decent for a car of this size, although that’s less than the Tesla Model 3 (594L) which has an additional well under the floor. 

Still, enough room for the largest (124L) and smallest (36L) suitcases from the CarsGuide three-piece luggage set with some room to spare.

The power tailgate can be operated hands-free via the key or an always welcome under bumper kick function.

Volume expands to 1290 litres with the rear seats folded and there’s a modest 18-litre ‘frunk’ under the bonnet.

The bad news is a repair-inflator kit rather than a physical spare wheel, but the better news is the IM5 Performance can tow a 1500kg braked trailer (750kg unbraked).

The IM range also features the ‘MG iSmart’ app allowing remote control of various functions including charging, checking vehicle location and route planning. 

Is there anything more retro than sitting down low in a sports car with just centimetres separating your buttocks from bitumen?

This is the BRZ experience, but once sat snug, ensconced in superbly supportive sports seats, you forget all about the fumbled entry and graceless egress that awaits and instead revel in the moment.

Arms outstretched, hands gripping a perfectly-sized wheel, ahead of crisp electronic instrumentation, with controls so intuitively placed and presented that soon everything’s operated via muscle memory, Subaru has nailed the ergonomics.

Oh, and the joy of a handbrake lever! It's just so naturally and beautifully driver-orientated. 

Okay. Owners of the original (ZD6) generation will already know all this. So what’s changed? Besides nothing conceptually, basically everything executionally.

The dated old dash has been ditched for a dated – but much prettier – new fascia, that’s all horizontal layers and matt black plastic, just like Japanese sporty coupes were in the 1970s and ‘80s. Except for the 8.0-inch touchscreen, of course, which looks a little aftermarket with its low-res TomTom nav, but is easy to figure out and a cinch to use on the go.

The climate control and toggle switches are lovely to use, there’s bottle storage in each door and, as a bonus for going automatic, an extra beverage holder to the pair beneath the centre-console lids exists. This matters if you're regularly transporting thirsty passengers cramped out back. More on that in a moment.

Other than the contortions required to get in and out, the BRZ’s is actually shockingly practical – from the surprisingly good all-round vision afforded by all that glass area as well as thinner pillars and sleeker exterior mirrors than before, ample ventilation and handy storage, to front-seat comfort and a compliant ride.

Plus, you’ll soon learn that the frameless doors provide easier entry and exiting when their windows are down. You wouldn’t think twice about commuting in this baby. Cancel that expensive small SUV order now!

The tS’s extra suede-esque upholstery, baboon’s butt red starter button and STi instrumentation cluster lift the ambience above the cheap sports car vibe of the 2012 original, while the whole ensemble is superbly screwed, clipped and/or glued together.

Gripes? For such a recent model, the lack of a USB-C port anywhere in the BRZ is an oversight. There are no overhead grab handles to help haul yourself out. At speed there's too much road noise. And only the front passenger seat has a single-action slide-and-tilt motion with return for getting through to/from the back, meaning you’re forever grappling with seat levers if you need to enter/exit from the driver’s side.

Now, granted, the rear pair of seats are occasional-only for taller folk, but there’s every chance the '+2' element of the Subaru is the main reason you’d be pondering one of these over, say, the strictly two-seater MX-5.

At 178cm, your tester just about hits the height limit for back-seat accommodation. Actually, the cushion and backrest base are thoughtfully padded and angled, but scalps scrape ceiling and/or glass depending on posture, the front-seat occupants need to slide their chairs forward for knees to fit and there’s barely any space for bigger feet.

But then, this is not the point of a coupe. The fact the BRZ is fine for shorter trips adds another level of practicality, even if there are no grab handles or reading lights to access. And, thoughtfully, the cabin engineers created the centre console lid to remain open for rear-seat access to cupholders, two USB-A ports and a single aux (!) outlet.

That's why the auto's extra cupholder comes in so handy.

Further back, the one-piece backrest folds flat to boost cargo-carrying practicality and versatility, since the boot is a modest 201 litres in capacity. And, it’s now easier to do that thanks to a boot-sited backrest release. It beats having to clamber inside the car every time, as per the earlier generation BRZ.

Keep in mind the tS loses the other BRZ grades’ full-sized spare wheel, presumably in the name of dynamic precision. A tyre-inflation kit is a poor substitution in puncture-prone Australia.

Oh well. At least you’ll be in a pleasant and charming coupe environment whilst you wait for roadside assistance.

With cheap coupes almost extinct nowadays, even at $48,690 (all prices are before-on-road costs), the costliest BRZ still represents exceptional value-for-money.

Here’s a plot twist, though. Our test tS is an auto, but only costs $1000 more, from $49,690. And it is pretty well equipped to boot.

Every BRZ includes four-wheel ventilated disc brakes, a mechanical limited-slip differential, keyless entry/start, adaptive LED headlights, dual-zone automatic climate control, an 8.0-inch touchscreen, a reversing camera, satellite navigation, digital radio, wired Apple CarPlay/Android Auto, heated and power-folding exterior mirrors and 18-inch alloy wheels.

And whether talking about the six-speed manual or auto, adaptive cruise control, lane-keep systems, tyre pressure monitors and other driver-assist safety technologies are now fitted across the range.

Based on the mid-range BRZ S specification, which over the base grade replaces cloth for a perforated suede-like material with leather trim and adds heated front seats, the tS brings STI-tuned suspension, Brembo brakes, darker alloys, blacked-out mirrors and roof antenna, a red/black interior trim combo, a push-button start and an STI-specific instrument cluster. All for a $3600 premium.

However, the laudable full-sized spare wheel in the other grades is turfed for a fiddly puncture repair kit. This is a retrograde step.    

Plus, the factory will not supply a sunroof, smartphone charger or wireless connectivity for your Apple CarPlay/Android Auto, though of course your usual Bluetooth phone connectivity with associated streaming is present.

So, with all these items, the BRZ tS’ sub-$50K retail price is red-hot value against the gorgeous MX-5 RF, since you’ll need to step up to the mid-range GT costing about $5K more than the Subaru for keyless entry and heated seats.

But, while only two people can fit inside, the Mazda has that magnificent acrobatic electric targa roof that no Subaru can match.

Then it’s a substantial jump to $75,800 for the rousing Nissan Z, though that boasts almost double the engine outputs thanks to a ferocious twin-turbo V6 powerplant.

Whichever way you look at it, and whatever coupe you choose, we salute you, Japan Inc.

The MG IM5 Performance is powered by an electric motor on each axle - the rear (372kW/500Nm) more powerful than the front (200kW/300Nm), for overall outputs of 572kW (that’s close to 770hp) and 802Nm of pulling power.

The official term for that amount of grunt is… a lot. And we’ll get to what it means on the road in the Driving section shortly.

Under the BRZ’s bonnet is the same 2.4-litre horizontally-opposed ‘boxer’ four-cylinder petrol engine, with double overhead cams and direct-injection.

Power is rated at 174kW at a heady 7000rpm while the 250Nm torque maximum kicks in at 3700rpm. Tipping the scales at about 1310kg, the power-to-weight ratio is an impressive 133kW/tonne.

The boxer engine drives the rear wheels only via a six-speed manual or, in this case, an Aisin-supplied six-speed torque-converter automatic transmission with paddle shifts.

The MG IM5 Performance features an 800-volt electrical architecture which means the 100kWh NCM battery can accept a DC peak charge of close to 400kW.

Only snag is the highest you’ll currently find in Australia is 350kW. But even at that rate you’ll still be looking at a 30-80 per cent charge in just over 15 minutes. Maximum AC charge rate is 11kW.

Claimed range is 575km (WLTP) which is less than the Tesla Model 3 Dual Motor AWD at 629km.

Over a week of city, suburban and some freeway running we saw average energy use of 20.6kWh/100km which is on the high side for an EV of this size but maybe not for one with this kind of performance potential. 

The BRZ is not tuned to save money at the petrol bowser.

What did we manage? Air-con on always and driven hard often with fuel-sapping performance testing included, our not-fully-run-in tS returned a commendable 10.2L/100km, while the car’s trip computer read out was 9.7L/100km.

Subaru says owners of the automatic model should expect to average 8.8L/100km on the combined cycle. Choosing to go manual bumps that up to 9.5L/100km.

As a result, the carbon-dioxide emissions rating is 201g/km (auto) and 217g/km (manual).

Note that filling the BRZ auto’s 50-litre fuel tank with the required 98 RON premium unleaded petrol should eek out nearly 570km between refills using the combined cycle figure.

First things first, the IM5 Performance is supercar fast. This 2.3-tonne five-seater blazes from 0-100km/h 3.2 seconds and with its dual motors combining to produce 572kW/802Nm, eye-widening performance always resides underneath your right foot.

But it’s not all about straight line speed. Ride comfort is excellent. Underpinned by an all-new platform, the IM5’s suspension is by double wishbones at the front and multi-links at the rear. But the key to its bump and rut smoothing ability is air suspension and ‘continuous control’ active damping.

Fold in double-glazing on the full-length glass roof and side windows, as well as active noise cancellation and you have a serene interior environment at any speed. Also worth noting the front seats are great; as grippy as they are comfortable.

Not only that, despite its relative heft, this mid-sizer steers well, too. Not the last word in road feel but it points accurately and the standard rear steering helps with prompt (but never jerky) cornering turn-in. Flick to ‘Sport’ mode and the IM5 is up for some enthusiastic running.

The rear wheels can turn up to 12 degrees in the opposite direction to the fronts at slow speed, which makes for a usefully tight 10-metre turning circle. But above that, at lesser angles, it adds extra stability and decisiveness in the way the car steers through even tight, twisty sections.

Rubber is top-shelf Pirelli P Zeros on 20-inch alloys (245/40 fr - 275/35 rr) and it grips hard, especially in the wet weather over much of the test period. Braking is solid, as it needs to be, with ventilated discs all around and four-piston callipers at the front. 

No adjustable regen braking but you can feel the ‘Cooperative Regenerative Brake System’ (CRBS) doing its thing when you lift off the accelerator. 

The physical rear view is modest thanks to the slope of the back window reducing its functional area for the driver to that of a 1950s VW Beetle. Even the interior rear-view mirror is tiny and folds up into a recess in the headliner if you’d prefer life without it.

But that’s where a rear camera view popping up on the upper screen display (accessed via the right-hand steering wheel click control) comes in handy. Side camera views are also available as is a 360-degree overhead view, which makes parking straightforward.

If you need more parking help there are various self-parking modes including a nifty ‘Curbside’ function that will realign the car hands-free if you’re parallel parked too far out from the kerb.

In a similar vein, a ‘Rainy Night’ mode projects left and right rear views onto the main screen using AI to enhance clarity and highlight pedestrians and cars.

Overall the ADAS (Advanced Driver Assistance Systems) are relatively unobtrusive but we found ourselves switching off the incessant overspeed chime that sounds for 10 seconds if you creep over the indicated speed limit, even when the system has misfired on the correct speed. For example, 40km/h school zones on a Sunday.

The over-zealous driver distraction warning also occasionally issued a visual and audible slap on the wrist when I was looking straight ahead. Tellingly, there’s a specific quick screen for turning both these functions off, but it kinda defeats the purpose of having them in the first place.

We also found the adaptive cruise control to be hesitant in multi-lane environments, reducing speed occasionally because the system seemingly believed a car was set to merge, when it wasn’t.

The brilliant thing about the BRZ/GR86 twins is they’re just so great to drive regardless of transmission.

And, after a week behind the wheel of the BRZ tS auto, there are even unique benefits to make a very strong case in its favour over the admittedly incredibly satisfying manual.

The numbers tell a compelling story.

With an impressive 133kW/tonne (or thereabouts) thanks to a larger engine (with 18 per cent more power and 20 per cent more torque than before) and a tight-ratio six-speed auto, the BRZ springs off the line with an almost frenetic liveliness, providing snarly, punchy performance right to its lofty 7500rpm red line.

Select manual mode and the auto will also hold bounce off the rev limiter.

Okay. It’s still not sports car fast, per se, with relatively modest outputs and a 0-100km/h time in the mid-six second bracket, but what there is works hard to make you feel like you’re going very quickly. That said, the BRZ will bowl along at quite a cracking pace.

Select 'Sport' mode, and there’s even more urgency, with the sweetly-calibrated auto hanging on to its ratios a little longer. Here’s where the Tiptronic-style lever/paddle shifters come into play, allowing for that extra level of interactivity.

Even with out test car's odo well under 1000km, this boxer engine has a very deep set of lungs and a lot of bandwidth to explore.

The generational change that saw the swapping out of the old 2.0-litre for this torquier 2.4L seems to be for the benefit of the auto.

And that’s not even the best bit.

The BRZ skates along with an Olympian’s confidence and control, providing an agility and grace reserved for Porsches, Lotuses and the like.

And it’s not just the wonderfully tactile steering at work either, because this possesses that rare seat-of-the-pants connection that makes the driver feel like part to the car.

Suspension is by MacPherson struts up front and a double-wishbone arrangement. Subaru reckons weight distribution is a close-to-ideal 53:47 front/rear.

Like all second-gen BRZ/GR86 models, the architecture underneath is loosely based on Subaru’s small-car platform that dates back decades, though it has been significantly updated and improved along the way.

If you love the sort of driving where you long to sense the road, corner with the throttle and swing out the rear of the car using just your hips, then the tS is your sort of sports car.

From the brilliant brakes to the nuanced tune of the traction control systems, balanced precision is the name of the game here. It tingles senses like an ASMR sensation. The fact this is as an auto does not change anything.

And, you know what? The uprated STI dampers even seem to benefit ride quality, because while the tS is obviously a taut and muscular drift-ready machine, the suspension is never too stiff or hard, allowing this BRZ to be more than capable as a commuting machine.

Yep, even over craggy inner-urban pot-holed and tram-lined roads, the Subaru’s comparative comfort and sophistication only endeared us to it even more.

So, surely there are downsizes, right? Well, the Michelin Pilot 4 215/40R18 tyres sure love to amplify road noise inside. This is not a quiet car over some of our coarser bitumen surfaces, and it can quickly become tiresome.

And… that’s it for criticism from a driving point of view. The BRZ tS can put a smile on your face just like MX-5s and Caymans can. Even/especially the auto if you will seek to schlepp around in one every single day with a minimum of fuss.

And all for around $52K drive-away. Bargain. Where do we sign up?

Unlike the previous BRZ, the second-gen version does not have an ANCAP rating.

Subaru says it has taken the old platform and applied elements of its newer architecture to improve front lateral flexing rigidity by almost 60 per cent and body torsional rigidity by approximately 50 per cent.

The body sees beefier body-welding techniques, reinforced (yet slimmer for improved driver vision out) A- and B-pillars, and an increase in hot-pressed materials, high-tensile steels and aluminium in impact areas make for better occupant safety.

Seven airbags are fitted (dual front, front side, curtain and driver’s knee), along with Subaru’s 'EyeSight' preventative safety system featuring AEB with 'Pre-Collision Brake Assist', blind-spot monitoring, rear cross-traffic alert, 'Reverse Automatic Braking', lane change assist, 'Lane Departure Warning' (LDW), 'Lane Sway Warning', 'Lead Vehicle Start Alert', 'High Beam Assist' and adaptive cruise control (with full-stop functionality).

All manual as well as automatic BRZs now have the full driver-assist tech suite included as standard.

Also present are tyre pressure monitors, Brembo ventilated four-wheel disc brakes, a mechanical limited-slip differential, electronic stability control, anti-lock brakes with 'Electronic Brakeforce Distribution' and 'Brake Assist', traction control, 'Brake Limited Slip Device', a 'Brake Override System' and a reversing camera.

There is no data on the AEB speed/operation parameters at the time of publishing, but the LDW activates from 50km/h.

Finally, three child-seat tether points and two ISOFIX anchor points are fitted in the rear.

The MG IM5 Performance is covered by a seven-year/unlimited km warranty, which is a plus, but the catch is it’s conditional on authorised dealer servicing. Go elsewhere and the term drops to a more common five years/unlimited km. The drive battery is covered for eight years/160,000km, which is the norm in the Aussie market

Servicing is required every 12 months or 20,000km with charges averaging $586 per workshop visit for the first five years, which is on the high side for an EV, even at this price point, the average bumped up by a more than $1400 doozy at year four.

MG IM models are sold (with service available) through all of MG’s 100-plus dealerships across the country, so no concerns there.

All Subaru BRZs come with a five-year/unlimited kilometre warranty, as well as one year’s free roadside assistance. Service intervals are at 12 months or 15,000km, whichever comes first.

There is five years/75,000km of capped-price servicing available, with the first starting from around $365, then stretching to $586, $460, $825 and $380 for an average of $523.