BMW 4 Series vs BMW i Series

What's the difference?

The BMW M440i xDrive Gran Coupe manages to combine sleek design with a fun-to-drive personality and surprising practicality. It’s a rapid premium, four-door, five-seater offering extra flair, and in this part of the market, good value. But more than anything else it’s got a cracking in-line six under the bonnet.

BMW’s iX M60 isn’t just the brand’s flagship all-electric SUV, it’s a statement that the electric future is here and it doesn’t have to be boring.

Pricing aside, the top-spec iX serves up practical space and prodigious performance in a package that is punctuated with panache.

The sizeable battery also allays any concerns over range, while the cabin’s appointments and fit and finish are definitely befitting of a BMW.

It’s not designed to be for everyone, and that’s okay, too, because the small customer base willing to part with around $230,000 for an electric SUV in 2022 will find a lot to like about the iX.

So, how does this four-door 4 Series differ from a four-door 3 Series? The answer is as plain as the nose on this car’s face.

BMW’s head of design, Adrian van Hooydonk, has been expanding the brand’s signature ‘kidney grille’ in every conceivable direction, and this is the much talked about interpretation adorning all 4 Series models (petrol, hybrid and electric) as well as the M3 sedan.

The new Gran Coupe is longer, wider, and taller than the outgoing model, and the track is broader, front and rear. The wheelbase has also been extended, now a whole 5.0mm longer than the 3 Series.

The DRLs and headlight main beams are LED with laser high beams, immense gills square up the edges of the front clip, while a vent and the strake attached to it stand the car apart. Plus, of course, the doors are frameless. 

One niggle, though. I’m not in love with the slender door handles. It’s hard to get a good grip on them, especially in the wet. 

Standard 19-inch alloy rims are shod with Pirelli P Zero rubber 245/40 fr / 255/40 rr), the roofline slopes distinctly towards the rear, a lip spoiler on the trailing edge of the tailgate is classic BMW, darkened LED tail-lights wrap around the rear corner, and a diffuser-type panel is flanked by large exhaust apertures.

Our car’s ‘Aventurine Red’ finish is a $3850 option, but to my eyes anyway it looks superb.

Exterior trim including the grille frame, front air intake inserts, mirror upper housing, model designation badges, and tailpipe are finished in ‘Cerium Grey’, which I reckon 99.9 per cent of people will see as black. 

The interior will be familiar territory for any current BMW owner, the 12.3-inch digital instrument screen sitting in a compact, hooded binnacle, and partnering with a 10.25-inch multimedia display standing proud of the dash above the broad centre stack. 

The seats are trimmed in top-shelf leather with blue contrast stitching, plus the grippy sports wheel is also wrapped in genuine hide.

BMW calls the finish on the main buttons and controls ‘Galvanic’ which translates to a slick silver metallic look and feel. Configurable ambient interior lighting is a nice touch, and the broad console enhances the driver-focused feel, with a sprinkling of carbon-fibre around the centre console and dash lifting the sense of occasion.

Overall, the interior feels clean and classy with an obvious attention to detail.  

Close your eyes and ask your eight-year-old self what an electric BMW SUV would look like, and chances are something like the iX will come to mind.

Sleek and slender, but still very BMW is the best way we can describe the iX.

Of course, we cannot talk about styling on a BMW without mentioning its front grille.

With a more vertically stacked orientation, the iX’s grille has been described as ‘toothy’ or even an ‘eye sore’ by the public in the past. But honestly, we think this attention-grabbing front end suits the swagger of the M60.

The gold highlights throughout are especially baller, and the grille serves as double-duty to hide a lot of the front-facing cameras and sensors required for more of the high-tech driving features like semi-autonomous driving.

The grille is flanked by BMW’s usual quad-headlight design for a menacing appearance on the road, and we particularly like the contrasting colours and sharp lines of our grey-coloured test car.

Another cool feature is the front badge, which can be popped up and serves as an inlet for the windscreen washer jets.

In profile, the 22-inch wheels look almost too small against the huge swathes of bodywork, but BMW has done a good job in slimming down the M60 thanks to the gloss-black stripe that runs along the bottom of the doors.

Speaking of, the handles might not pop-out like some of its rivals, but the recessed handle is highlighted nicely with gold-copper accents that also run along the beltline and door mirrors.

The D-pillar is also broken up with a blacked-out section that divides the roof, also helping slim down the behemoth BMW, and up close the section is embossed with ‘iX’.

At the rear, the clamshell boot might look large and bulky, but the design is helped by the very slender tail-lights and bumper broken up with more gloss-black.

Step inside the cabin, and the iX’s aesthetics are similarly unconventional, but the interior design also follows function.

For starters, the odd-shaped steering wheel is the feature that stands out the most, but you quickly realise the flat bottom helps with entry and exit into the driver’s seat.

As an all-electric model, there is no transmission tunnel, with the footwell between the driver and front passenger easily accessible for a more open-feeling cabin.

There is an armrest of course, while the area for multimedia controls is adorned with a one-piece, wood-like finish to contrast the crystal control knob. It’s a mix of technology and the natural environment, you see, much like the iX itself.

Do we love the styling of the iX M60? Much in the same way Louis Vuitton’s latest fashion range might not appeal to the masses, the iX M60 is likewise a polarising proposition.

To answer the question, yes, the iX M60 is a very stylish SUV that draws the eye and turns heads like nearly nothing else on the road – and that is exactly the point.

At close to 4.8m long the 4 Series Gran Coupe is a sizeable machine. Up front, the feeling is airy and comfortable, and the rear is surprisingly spacious, especially in light of the car's sloping roofline.

At 183cm I have to fold myself tightly to fit under the low roof, but once inside I have enough room to sit behind the driver’s seat set for my position with more than enough legroom and adequate headroom. Put three full-size adults across the back row, though, and there will be breathing difficulties.

Kids will be fine, however, and individual vents with adjustable temp in the rear was a big plus during a particularly hot test week.

For storage there are generous door bins in the front with room for large bottles, a decent glove box, dual cupholders in the centre console, a reasonable lidded bin (which doubles as a centre armrest), and the wireless device charging bay (forward of the gearshift) makes a handy oddments space when not in use.

In the rear, again the doors feature pockets with room for (medium-size) bottles, there’s a fold down centre armrest with two cupholders, but thanks to the one-piece shells on our test car’s optional M Sport front seats there are no map pockets.

Power and connectivity runs to a USB-A socket and a 12V outlet in the front centre console, as well a USB-C port in the front storage bin, a pair of USB-Cs in the rear, and a 12V outlet in the boot.

Speaking of which, lift the tailgate and with the rear seat upright we were able to fit all three of our suitcases or the beefy CarsGuide pram into the healthy 470-litre (VDA) boot space.

Lower the 40/20/40 split-folding rear seat down and 1290 litres of volume is at your disposal. Plus there are handy bag hooks and tie-down anchors to help secure loose loads.

You can also tow a braked trailer up to 1.8 tonnes (750kg unbraked), but don’t bother looking for a spare of any description, a repair/inflator kit is your only option.

Despite what it might look like on the outside or how it drives behind the wheel, BMW’s iX is undoubtedly a large SUV in shape.

Measuring nearly five metres long, and featuring a 1967mm width and 1696mm height, the iX M60 is certainly a sizeable machine.

However, it is the three-metre long wheelbase that is the most important measurement here, as it enables a vast and expansive interior space fit for the family.

The front passengers have ample room to get comfortable, and like we said in the design section of the review, there is nothing dividing the footwells of occupants up front.

This makes it the perfect place to park a backpack, handbag or even nappy bag when on the go, and means the front passenger doesn’t lose out on any legroom.

Even the armrest affords storage solutions for all the little things you might have you in pockets, while a wireless smartphone charger means you always have somewhere to place your device.

The front seats, finished in a quilted leather, might look plain, but are wonderfully supportive – even when the speedo climbs and you're carving up corners.

And in the rear, the story is largely the same, with seats that look and feel great and plenty of room for passengers to get comfortable.

My 163cm frame had no problems with leg-, head- or shoulder-room, but the base middle seat is raised a little.

We’ll also call out the great way BMW has hidden the ISOFIX mounting points for child seats, which is hidden by a flap that can be raised or lowered depending on what is needed.

It’s an elegant solution to something that can be an eyesore in other models, and shows the lengths BMW has gone to for the little details.

There is also a fold-down armrest for passengers back there, while the back of the front seats feature two USB-C charging ports, map pockets and spots to insert entertainment screens. 

Open the clamshell boot and there is a cavity that will swallow 500 litres of volume, plenty for a small family like ours, with the charging cables hidden neatly under the floor.

The boot floor is very long, too, meaning large objects will easily fit into the rear, while the 40/20/40 rear seats can be folded down to increase carrying capacity to 1750L.

To put that into perspective, something like the Ford Ranger is rated for more than 1200L in its tray, and while we would never condone the use of an iX to carry worksite tools, it does make carrying a surfboard or Ikea furniture that much easier.

However, it's worth pointing out that there is no front trunk in the iX, as there are electric motor and mechanical bits found in there. 

It’s just a shame that in a car of this size, BMW has not managed to position things with room left for a bit of usable space under the bonnet.

The 2023 BMW iX is available in four flavours, with the entry-level xDrive40 variant coming in at $135,900, before on-road costs.

The same powertrain is also available in Sport trim for $149,900, while a higher-output xDrive50 Sport sits at $174,900.

However, the top dog of the iX range is the M60, priced at a substantial $222,900.

As you can probably tell by the M badging, the iX M60 has more of a performance bent than its more affordable siblings, but it still commands a nearly $90,000 premium over the entry-level BMW electric SUV.

You are also getting a long list of equipment for the spend, though, with standard equipment including keyless entry, push-button start, heated and cooled front seats, a head-up display, and four-zone climate control – all things expected of a luxury model like the BMW iX.

The over-the-top extras you get on the M60 however, include soft-close doors, 22-inch alloy wheels and an electrochromic glass roof which can change its opacity by sending electricity through the middle layer of film. How high tech!

We also like that the iX can use the front-facing camera as a dashcam so you do not have an unsightly camera with long cables attached to the windscreen.

The iX M60 also features a curved 12.3-inch digital instrument cluster and massive 14.9-inch multimedia touchscreen with the latest 'iDrive 8' software.

Look, there’s no denying the iX M60 is a pricey vehicle, especially when stacked up against the Audi e-tron S ($173,900) and Jaguar I-Pace HSE ($160,217), but the BMW does kick it up a notch in performance compared to its perceived rivals.

Tesla’s upcoming Model X Plaid will no doubt have something to say about that, but pricing and timing for that model is yet to be revealed. For reference, the last Model X offered in Australia was in 2020, and the top-spec Performance variant was priced at $177,375.

So, does the BMW iX M60 represent good value for money? Not really. But buying a brand-new iPhone whatever on the day it launches is also not good value for money.

Early adopters and people who appreciate having the very latest in technology will always be asked to pay a premium.

Under the bonnet is BMW’s (B58) all-alloy 3.0-litre twin-scroll turbo intercooled, in-line six-cylinder engine, driving all four wheels via an eight-speed automatic transmission and electronically controlled clutch pack, as well as an electronic limited-slip differential at the rear.

It features high-pressure direct-injection and BMW’s ‘Valvetronic’ system managing air flow to the intake side, to produce 285kW at a relatively high 5800-6500rpm. But the big punch is 500Nm of peak torque from just 1900rpm all the way to 5000rpm.

The M440i is also a mild-hybrid with a 48-volt starter motor-generator and supplementary battery able to give an 8.0kW kick at low engine speeds.

A large part of why the iX M60 is so much more expensive than its siblings, is because of its powertrain.

With two electric motors spinning all four wheels, the iX M60 makes a staggering 455kW of power and (are you sitting down?) 1100Nm of torque.

This means the iX M60 can accelerate from 0-100km/h in just 3.8 seconds. Not bad for a 2.5-tonne SUV, and it puts many petrol-powered rivals to shame.

This also makes it much more potent than the xDrive40 (240kW/630Nm) and xDrive50 (285kW/765Nm), while also blowing away the Audi e-tron S (370kW/973Nm).

The only electric car that comes close right now in Australia is the Porsche Taycan Turbo S (560kW/1050Nm), but the Tesla Model X Plaid supposedly makes 760kW/1020Nm from three electric motors.

And while the Tesla is not yet available, the Taycan Turbo S is more than $100,000 pricier than the iX M60, and doesn’t offer the same levels of practicality.

BMW’s official fuel economy figure for the M440i xDrive Gran Coupe, on the ADR 81/02 - urban, extra-urban cycle, is 8.2L/100km, the 3.0-litre turbo six-cylinder emitting 187g/km of C02 in the process.

Stop/start is standard, and we saw an average of 11.1L/100km over city, B-road and freeway running during a week with the car.

With the 59-litre tank brimmed (with minimum 95RON premium unleaded) that real-world test number translates to a range of around 530km.  

Equipped with a 112kWh battery pack, the iX M60 features 566km of driving range according to the WLTP cycle.

In reality, we saw closer to 540km of driving range on the dash readout with a full charge, but of course this is all subject to things like the level of regenerative braking you apply, ambient temperature, the driving mode chosen, air conditioning and weight.

Officially, the BMW iX M60 consumes 26.5kWh per 100km, but our week with the car saw an average of 25.6kWh/100km with driving mainly focussed on short, inner-city trips that are advantageous to an electric car.

This betters the energy consumption of models like the Taycan Turbo S, which features a combined-cycle test of 28.5kWh//100km, but is much more energy-hungry than something like a Nissan Leaf (18kWh/100km).

This figure is also very dependent on driving style and environment, but for a 2.5-tonne SUV that will ferry the family and more, consumption isn’t too bad.

Charging options include 11kW for AC and 200kW DC fast-charging – the latter of which can juice the iX M60 from 10-80- per cent capacity in just 35 minutes, if you can find a compatible outlet, of course.

BMW says the M440i xDrive Gran Coupe will accelerate from 0-100km/h in 4.7sec, and I reckon the threshold for a properly quick car is sub-five seconds.

The 3.0-litre turbo six develops its peak power of 285kW between a relatively lofty 5800-6500rpm, but the big number is a solid 500Nm punch of pulling power delivered between 1900-5000rpm.

Squeeze the throttle pedal pretty much anywhere in the rev range and the response is glorious. Rapid acceleration accompanied by raucous engine noise and rorty exhaust note (albeit with some synthetic support). Various pops and bangs in the Sport settings add extra entertainment.. 

The eight-speed auto gets some electric support from the mild-hybrid system to fill the torque gap on up shifts, and the result is a conventional torque-converter transmission that behaves like a dual-clutch.

Shifts are seamless in general driving, and satisfyingly quick in a more aggressive mode, the wheel-mounted paddles dialing up the fun in manual changes. 

Suspension is double wishbone front and multi-link rear with the standard ‘Adaptive M Suspension’ built around an adaptive damper set-up.

The change between the ‘Comfort’ setting to the ‘Sport’ or ‘Sport+’ calibration is close to instant and makes a discernible difference, especially in terms of ride comfort.

I found the best ‘Individual Sport’ arrangement to be damping in Comfort, with the steering engine and transmission in Sport. The car flows so beautifully through corners with urgent response from the powertrain.

By all means dial up the suspension if you’re having a real crack, but the car feels superbly balanced, stable and predictable in Comfort (front to rear weight distribution is 50:50).

The electrically-assisted variable-ratio steering is nicely weighted with good road feel, and the grippy sports steering wheel is a nice point of contact.

The xDrive AWD system’s default setting is rear-biased, although it will push most of the drive forward when required. But the RWD feel is unmistakable. 

The M440i weighs in at around 1.9 tonnes but feels lighter and more nimble than that figure would typically indicate.  

A standard electronically-controlled M Sport limited-slip differential puts the power down confidently. I have a favourite LSD test corner on my regular evaluation drive, a sharply twisting and rising left-hander.

Rolling into it in a low gear before planting the throttle mid-corner, the car simply hunkers down without a hint of fuss (or traction loss) as it rockets out the other side.

Optional M Sport front seats ($2000) provide comfort and firm location in equal measure and in terms of ergonomics BMW knows how to focus on the driver and set-up an efficient environment. Key controls are perfectly positioned and simple to operate.

I have an issue with the ‘Lane Departure Warning’ function, however, which is too quick to intervene and overly intrusive when it does so. I turned the ‘Steering Intervention’ function off. You can dial down steering wheel vibration warnings, too.

The standard M Sport brakes feature big vented rotors front and rear, with fixed four-piston front calipers doing the bulk of the work. They’re strong but don’t bite or release too aggressively. It’s easy to grease in a smooth application. 

Maybe it’s just us, but as soon as we step into the driver’s seat of the iX M60, the “Gotta Go Fast” theme song for the Sonic the Hedgehog cartoon just comes to mind.

And that’s probably because this BMW all-electric SUV seems to want to do one thing... go fast.

Sure, there are various driving modes on offer, including 'Sport' and 'Efficient' (as well as 'Expressive' and 'Relax', weird names, but okay BMW), but no matter what mode you are in, there is just an eagerness and urgency in the iX.

And this feeling of immediacy isn’t just because the iX is an electric car. We’ve experienced that before in other EVs. This is because it’s an M-badged BMW.

The iX M60 is wonderfully responsive to throttle inputs, and the 1100Nm (!) available makes it almost comical getting up to speed from a freeway on-ramp.

And in day-to-day traffic situations, it feels like you’ve got cheat codes on while driving.

Waiting to turn into traffic and see a gap that you wouldn’t normally be able to squeeze into? The BMW iX M60 can do it.

How about cruising along and need to change lanes, so you nudge forward a bit for the opening in traffic? Put the foot down and in the span of half a second, the BMW iX M60 has surged forward enough to flick the indicator on.

And take the iX M60 out to some twisties and that brute force will get you to the end of the road in a time you didn’t think was possible in a 2.5-tonne large SUV.

It’s almost unfair how the instant torque makes it everything so much easier on the blacktop.

But that eagerness is a double-edged sword, as when you want things to calm down and operate the iX in the smoothest manner possible, it’s harder than you might think.

Because the throttle is so sensitive and the powertrain so potent, even the slightest twitch of the right foot can lead to a quick burst of speed that knocks you back into your seat.

Even with things dialled down to the Efficient drive mode, it didn’t do much to curb the unruly iX M60 from wanting to break free at the first moment of carelessness.

Don’t get me wrong, it never gets dangerous or unpredictable, but it’s a bit like toilet training a toddler – you’ve always got to be on top of it.

And for some, that’s fine, but for others when you’ve just had a full-on day at work and have to commute home to the family, it can get tiring. 

BMW’s iX range, including the M60, was awarded a maximum five-star safety rating from ANCAP when tested in 2021.

The adult and child occupant protection tests notched the highest results (91 and 88 per cent respectively), while the vulnerable road user score (73 per cent) and safety assist (78 per cent) examinations also yielded respectable scores.

Standard safety features include all the usual suspects such as autonomous emergency braking, lane-keep assist, rear cross-traffic alert, blind-spot monitoring, a surround-view monitor and traffic sign recognition.

However, there is no rear AEB offered on the iX, which is odd in a vehicle that offers all the bells and whistles in terms of equipment. 

Littered throughout the cabin, there are nine airbags in total, including a front centre airbag to protect against passengers colliding in the event of an accident, as well as second-row chest and head cushioning units.

The M440i Gran Coupe is covered by BMW’s three-year/unlimited km warranty (including paintwork), as well as 12-year/unlimited km anti-corrosion (perforation) cover. 

That’s off the premium market pace now with Genesis, Jaguar, and Mercedes-Benz at five years/unlimited km and Lexus set to join them from January 1st, 2022. 

That said, roadside assistance is provided for the duration of the main warranty, but it’s worth noting “rattles and squeaks” are only covered for one year.

Service is condition-based, the car telling you when maintenance is required, and a range of service packages are available. The basic plan covering a 4 Series for five years/80,000km comes in at $1750. 

Like all new BMWs, the iX now comes with a five-year/unlimited kilometre warranty with roadside assist over that period.

BMW held out at three years/unlimited km long after competitors had moved to five years. But this finally matches the assurance periods offered by premium rivals Audi, Genesis, Jaguar, Lexus, and Mercedes-Benz, and is up two years from the BMW warranty offered just earlier this year.

The iX uses BMW’s 'Condition Based Servicing' system, which means the vehicle will notify owners of when it needs maintenance, therefore there aren’t any scheduled servicing intervals.

However, services are bundled into four- and six-year plans, priced at $1520 and $2195 respectively. An annual average of $380 for the former, and $367 for the latter, is competitive in this part of the market.