Audi RS6 vs BMW I4

What's the difference?

You’ll notice a number out of 10 on this review, you should ignore it.

Not only is it irrelevant because you can’t buy one, but the RS6 Avant GT isn’t a ‘brain’ car, it’s a ‘heart’ car. As much as a five-seat wagon can be, anyway.

Whether you think it’s overkill, overpriced, or overhyped, the GT is a celebration of a car that’s become such an icon for petrolheads. It’s also probably a marker for the end of an era, because we don’t see many V8 family cars getting about anymore.

Well done to Audi, the accounting team in particular, and if anyone who owns an Avant GT is willing to let me have another drive, my in-box is open. 

Or I’ll just keep an eye out.

The BMW i4 balances a solid, old-school feel with the beauty and stunning looks of high-end technology. It feels like the end of an era for the German brand before it leaps into the screen-heavy age of software-defined vehicles.

While BMW hasn’t publicly announced an end-date for i4 production just yet, the new i3 is bound to overshadow it once it arrives. It offers more than double the claimed range and will likely address a number of this car’s flaws.

In the meantime however, the i4 is definitely worth considering if you value driving dynamics and a quality feel in a car that you can drive daily.

“It looks like a toy car you’d get in a Kinder Surprise” was the first comment from my housemate upon seeing the $400K collector's item on wheels.

Harsh, but to anyone unfamiliar with the Audi 90 quattro IMSA GTO racer, there’s arguably too much going on with the RS6 Avant GT.

The red, grey and black decals, the chunky white 22-inch wheels, the flared and vented front fenders and the wing over the rear window… all of it is a lot to take in, but it’s very faithful to the IMSA car.

As pictured, the 90 quattro IMSA has the red around the bottom lip of the car, on the bonnet, and even its rear wind, the same as the red on the rear of the Avant GT.

Some of the black at the front of the car, where the bonnet and fenders are, is just exposed carbon-fibre rather than a black decal.

Short of the sponsors and racing numbers, the Avant GT does a fabulous job of paying homage to the 1989 race car. It just means you’re going to be the centre of attention anywhere you drive. Or park.

On that note, an alternative paint and graphic scheme in 'Mythos Black' (this car is 'Arkona White') was available to customers and is decidedly more ‘under the radar’. You have to wonder, though, if you opted for the subtle version of a car that pays homage to a fire-breathing IMSA car, would you feel like you took the coward's option?

Besides, you’re either keeping this car in some kind of temperature-controlled bubble, or (hopefully) spending most of your time around it in the driver’s seat. From there, you don’t have to grapple with the question of garishness.

The interior is, while elevated past standard RS6 vibes, a lot more subtle. Dark materials of microfibre, carbon, leather and the smudge-prone piano black (an Audi favourite) are joined by a relatively restrained serving of red in the contrast stitching and seatbelts.

The BMW i4 is firmly at the end of its lifecycle, however its exterior design is ageing like fine wine. This is apt given our tester was finished in delicious-looking 'Fire Red' metallic paint.

The overall proportions of this car are gorgeous, especially towards the rear where the roofline is drawn out, accentuating the liftback look.

This latest update only brought minor tweaks to the design, including refreshed headlight and tail-light signatures. As mentioned above, the M Sport package is now also standard which does give this car a subtly sporty look.

Inside the design marries together the best of the old and new worlds. A major highlight is the curved display housing not only the 12.3-inch digital instrument cluster, but also a 14.9-inch touchscreen multimedia display. It’s a stunning setup that looks ultra modern.

On the flipside however, there is still a lot of physical switchgear on the centre console, including a rotary iDrive controller that allows you to control the content on the screen. It’s a great setup if you like to avoid getting fingerprints on the touchscreen.

While there are a few applications of glossy piano black around the cabin, it’s balanced nicely with other metallic and matt finishes. You’re able to choose from a few different trim inlays, including aluminium and open-pore wood, for no extra cost.

Lastly, the new M Sport steering wheel looks great in this car and adds a lovely sporty touch to the interior.

You’ve bought a $400K collectible sports car capable of effortlessly deleting kilometres of highway with your family and enough luggage for a week. Usually a special edition driver's car at this price point is doing well if it has a place to put a phone and a water bottle, let alone phones and water bottles for four people - five if you really need.

Yes, in the performance car world, the Audi RS6 Avant has long been king of the convenience game and the GT holds onto that. 

The seating position and ergonomics remains comfortable, the driver’s seat being manually adjustable means it can sit even lower, there’s decent storage in the door cards, cupholders are able to be hidden, the phone charger is under the armrest, there’s a spot for small items like keys, change or glasses and the rear seats have mostly the same alongside their own individual climate controls and heated seats.

Behind those, a 548-litre boot puts most performance cars to shame, but its 1658L space when the rear seats are folded down is unbelievable for something that you’d want to take to a race circuit.

Hopping into the i4, it’s clear you’re getting into a low-slung vehicle. If you’ve got poor mobility, it may be worth looking elsewhere.

Once you’re in though, the cockpit is a lovely space to spend time. The driver’s seat is beautifully comfortable and offers plenty of adjustment, including extendable thigh support.

Ahead of the driver the steering wheel is rather thick in classic BMW fashion. I appreciate the physical buttons and scroll wheels as they’re easy to understand and use on the fly.

The curved display not only looks stunning, but is functional and easy to use. The digital instrument cluster has a number of layouts you can choose from and it can be paired with the head-up display, which is great to refer to at a glance.

Moving across, there is a lot going on with the central multimedia system. It can feel overwhelming with the amount of content and information to begin with, but once you start poking around, things are logically sorted.

Thankfully there are also a series of shortcut buttons always at the bottom of the screen to take you to key menus.

Adding to this, there is the flexibility of having the iDrive controller. Reaching the far side of the screen from the driver’s seat can be a bit of a stretch and being able to use the rotary dial on the move is much easier.

There is wireless Apple CarPlay and Android Auto as standard. It takes up the full touchscreen display, which looks great.

Looking around the cabin, storage space is fine but not amazing. There are two cupholders plus a wireless charger tucked behind them on the centre console, plus a shallow centre storage area under the central armrest.

Hopping into the second row, it’s clear the focus for this car is on the occupants up front. The door aperture is rather narrow, making it tricky to get in and out gracefully.

In the second row space is nothing more than adequate. At a leggy 182cm tall, my legs almost touch the seat in front when it’s set to my driving position and my head almost brushes the roofliner. I’d struggle to spend a lot of time back here.

This is compounded by the massive hump in the centre that’s a carryover from the combustion platform this car is based on.

Second-row amenities include climate control with air vents mounted on the back of the centre console, two USB-C ports, as well as a fold-down armrest with cupholders.

At the back there is a large liftback that opens and closes electronically. With the rear seats upright there is 470L of boot space, which expands to 1290L when folded.

While this is not massive in terms of outright capacity over a similarly sized sedan, the envelope is much more open and usable.

There’s also a section under the boot floor that’s generously sized for power cables, among other odds and ends.

BMW now only offers one version of the i4 in Australia, the eDrive35. It dropped the M Performance grade when the facelift was introduced last year.

The 2026 BMW i4 eDrive35 is priced from $88,900 before on-road costs, which is $1100 more than it was in pre-update guise.

It’s worth noting that it now picks up the M Sport package as standard which gains sporty exterior and interior highlights. This was previously offered on defunct eDrive40 trim.

Critically the i4 remains under the LCT threshold which means that if you put it on a novated lease it’s exempt from Fringe Benefits Tax.

Standard features include 18-inch alloy wheels, LED headlights, power tailgate, 12.3-inch digital instrument cluster, 14.9-inch touchscreen multimedia system, wireless Apple CarPlay and Android Auto, synthetic leather upholstery and heated front seats.

It’s fairly standard on this front, though a heated steering wheel and ventilated front seats would make for a nice touch. However, this would likely tip it over the LCT threshold.

Audi’s venerable 4.0-litre, twin-turbo V8 engine remains at the heart of the RS6, though in the GT there’s no more power than the RS6 Avant Performance.

That means 463kW of power and 850Nm of torque delivered to all four wheels via an eight-speed torque converter automatic and Audi’s ‘quattro’ all-wheel drive system, making the RS6 Avant GT capable of a 3.3-second sprint to 100km/h, according to Audi. Top speed is a blistering 305km/h.

All this in a car I took to Coles.

The i4 eDrive35 continues to be powered by a single, rear-mounted electric motor that produces an unchanged 210kW and 400Nm.

This is nothing revolutionary in terms of the powertrain, though it’s nice it retains a rear-wheel drive-layout like the discontinued 4 Series Gran Coupe this car is based on.

BMW claims the i4 eDrive35 can do the 0-100km/h sprint in 6.0 seconds and the top speed is 190km/h.

Do you care about this section of the review if you’ve bought one? Surely not. 

Anyway, Audi claims 11.8L/100km in terms of fuel consumption and you’d better believe it’s 98 RON minimum. 

It’s got a 72-litre fuel tank, which was depleted rather rapidly on test. While driving conditions weren’t ‘fair’ in terms of the test given the content demands of a short-term loan, there’s probably a realistic figure somewhere between the claim and the 17.9L/100km I achieved over a few days.

The electric motor is fed by a 70kWh lithium-ion battery pack that allows for up to 448km of claimed range, according to ADR 81/02 testing.

This is 18km more than the pre-update car thanks to silicon carbide semiconductor components which are claimed to reduce energy consumption and increase range.

However, the Tesla Model 3 and Polestar 2 both still offer more range for less money.

BMW claims the i4 eDrive35 consumes an average of 16.3kWh/100km, according to ADR 81/02 testing. Over my 200km of urban testing I saw an average of 17.5kWh/100km, which isn’t fantastic as EVs are predominantly more efficient in the city.

Using my as-tested consumption, this means you have a theoretical range of 379km. That’s not great, though this range issue will be addressed with the forthcoming i3 electric sedan.

AC charging is available at rates up to 11kW, whereas DC fast-charging is offered at rates up to 180kW, allowing for a 10 to 80 per cent charge in 32 minutes.

There’s something unfortunate about how good the Audi RS6 Avant GT is from behind the wheel. That’s knowing how few people will properly get to enjoy it.

Not just because only 660 were built, but also because the majority of those 660 owners will be too worried about how much they’ve just spent on an automotive rarity to properly take it for a burn on a road, or even a track.

The RS6 was always an icon of Germany's penchant for subtle-looking cars that just happen to be capable of embarrassing much more brash vehicles, but the GT does away with the pretence and sharpens its teeth a little.

The specifically tuned rear differential makes for a more rear-biased driving experience in Dynamic mode, which means more agile cornering and a more natural balance compared to the way the RS6 sometimes feels - like a family wagon.

Its rival, the BMW M5 Touring, can go full rear-drive, but the Audi doesn’t need that as an option. It feels more capable and composed; ready to obey commands without fuss. A set of Continental SportContact 7 tyres (285/30) help there on the grip front.

The suspension underneath, adjustable coil-overs with three settings, is unique to the GT and lowers the ride height by 10 millimeters. It’s stiffer, 30 per cent at the front and 80 at the rear, and you notice it.

There’s more control and much less body roll, but the trade-off is the RS6 Avant GT is a little less comfortable on Australia’s particularly rough roads. Its 22-inch wheels don’t help.

It’s not, however, crashy or rattly. The suspension still does a fine job of stopping the driver being jostled around, but there’s a decidedly firmer response to the surface underneath. Again, still very composed.

With the new suspension, steering the GT feels easier than memory would suggest and the baseline was already good. There’s no unnecessary weight, but there’s still decent feedback from the front wheels and accuracy is bang-on.

Throttle adjustment in the corners, too, is easier with the rear differential, and it means anyone who still had reservations about Audi and understeer can be proven wrong.

The drivetrain remains unchanged from the Performance, which is a good thing. The effortless acceleration, even in the more aggressive 'Dynamic' setting with the transmission set to 'Sport' is smooth but seemingly unending.

Fortunately, the 4.0-litre V8 under the carbon bonnet sounds delightfully burbly, so getting to the speed limit or overtaking is a little treat every time. While the steering wheel paddles are there if you really need to drive in anger, the eight-speed is fine left to its own devices.

A 2.0-tonne family wagon with a V8 up front, easy communicative steering, and sporty suspension that settles well over bumps but allows enthusiastic corner attacks?

The RS6 Avant GT is in limited company.

BMW has positioned itself as creating vehicles that are the ‘ultimate driving machine’ for decades now and this i4 is no exception.

While it’s not an outright performance powerhouse, it doesn’t need to be in order to feel engaging to drive.

The rear-mounted electric motor produces a decent 210kW/400Nm and it’s enough to get moving in frenetic urban traffic with ease. You’ll rarely want any more out on the open road either as rolling acceleration is decent.

The regenerative braking system in this car feels natural and transitions to the friction brakes with no awkward lurching or inconsistencies.

I like how you can drive this car like a regular combustion car using both the accelerator and brake pedals, or with an extra flick of the gear selector you can activate one-pedal driving. During my loan I played around with both and didn’t have a favourite as both feel well tuned and easy to adapt to.

The steering is direct and on the lighter side, making the car feel agile and nimble on the move. However, in low-speed situations you realise the turning circle isn’t fantastic…

I appreciate that BMW opted for standard 18-inch alloy wheels that are paired with tyres that have chubby sidewalls as this keeps the ride from being harsh and jittery, especially over firmer bumps.

Don’t worry if 18 inches aren’t enough though, BMW offers alloy wheel options that go all the way up to 22 inches.

This is the type of car that suits a long-distance road trip as it’s such an easy and fun car to cruise around in. That's why it’s so unfortunate that the range limits how you can travel before recharges.

In terms of noise, vibration and harshness (NVH) in the cabin, the i4 is naturally quiet given it’s an EV. However, it feels like there’s extra insulation because even at high speeds tyre and wind noise are virtually nonexistent, creating a hushed and tranquil interior ambience.

The BMW i4 received a four-star ANCAP safety rating based on testing conducted by Euro NCAP in 2022.

It was held back from receiving a five-star rating due to its ‘Safety Assist’ score of 62 per cent. A car needed to receive a minimum of 70 per cent back in 2022 to achieve five stars.

It’s also worth noting that the Australian-specification BMW i4’s autonomous emergency braking (AEB) and lane support systems are claimed to be of a “higher standard” than the European-specification car tested by Euro NCAP. However, BMW never provided ANCAP with an Australian-spec i4 for verification testing.

Standard safety highlights include AEB, blind-spot monitoring, rear cross-traffic alert, lane departure warning, adaptive cruise control, front and rear parking sensors, plus a surround-view camera.

One of the few safety features that is missing is an active lane-keep assist or lane-centring function. When you drift near a marked line the steering wheel only vibrates to notify you and doesn’t physically move you back into the lane.

Audi’s five-year/unlimited kilometre warranty is below industry par, though most premium brands are in the same boat.

Twelve years of bodywork warranty against corrosion is also included, as is a five-year run of free Audi roadside assistance.

Five-year service plans can be purchased, or customers can buy back-to-back two-year extensions for the warranty, servicing and roadside assistance.

Like all electric BMWs, the i4 is covered by a five-year, unlimited-kilometre warranty, whereas the high-voltage battery is covered for eight years or 160,000km.

A five-year warranty has been commonplace within the premium space for a few years now, whereas many mainstream brands have since moved up to seven years of coverage, or longer in some cases. It’s far from competitive.

Owners also receive three years of complimentary roadside assistance.

BMW offers a six-year pre-paid service package priced at $2420, which averages out to just over $400 per year.