Kia Stinger vs BMW M5

What's the difference?

The Stinger GT-Line is a great machine. It looks good, feels good to drive and while it's not the cheapest large sedan, it's also not a Camry. With a strong European vibe, it's a nice bridge between boring-dependable and out-of-reach European. Boasting a strong link to Europe in its chassis DNA, it has it all apart, maybe, from the badge.

But Kia has a habit of doing unexpected things and the Stinger was a bold move worth making just for the halo effect of having such a cool car in the range. It has done good things for the company's reputation, as though the rest of the range isn't proof already.

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.

The Stinger looks fantastic. I know the car has its detractors, but there's a massive Euro influence here that sits well in my visual cortex. It's maybe not as ooh-aah as the A5 or the outgoing BMW 4 Series Gran Coupe, but the Stinger can and should be mentioned in the same breath. It looks terrific, even if it is a bit fussier in the details.

From the signature grille, the low beltline, big wheels and sports coupe roofline, it looks sleek and sophisticated. 

Inside is a bit more conventional, with some real classic touches such as circular air vents, conventional-looking gear selector and a flat-bottomed steering wheel. It's cool, clean and, with the big new screen, a bit more techy-looking than before. There are lots of nice materials and the odd rogue one, but it's a good cabin that feels well put-together.

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.

This is really a four-seater car. While there is good legroom in the rear, the falling roofline, small door aperture and huge transmission tunnel box you in a bit, almost rendering the middle seat useless for all but the shortest of folks. You do get your own air vents, though, which is generous.

The low roof also means limited headroom, made a little worse by the standard sunroof. I had room but taller people might brush the headlining. There are two cupholders front and rear for a total of four and each door has a bottle holder.

The boot is a modest-for-this-size 406 litres, rising to 1114 litres with the seats down. Access to the boot is good if not spectacular; the hatch opens wide but a slightly narrow aperture means loading and stowing flat packs and things like that could be a struggle.

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.

The last M5 was well equipped but the new car is wanting for nothing. Australian cars have just about every option for $259,900, before on-road costs.

Australian M5s wear staggered 20-inch front and 21-inch rear alloy wheels paired with standard metallic paint, 'M Carbon Exterior' package (including carbon roof and rear lip spoiler), adaptive LED headlights and BMW’s 'Iconic Glow' illuminated kidney grille surrounds. 

Keyless entry, a heated steering wheel, heated and ventilated front seats, interior camera, powerful 18-speaker Bowers & Wilkins sound system, M seatbelts, four-zone climate control and a power tailgate are the cabin highlights. 

Optional extras are thin on the ground; you can choose from (eight) no-cost paint colours and all manner of 'Individual' shades (from $4100), four interior trims including classy 'Dark Oak' wood and four leather colours. There’s classic black ‘Merino’ leather, or you can have it dyed with a mix of 'Silverstone', red or 'Kyalami Orange'. 

Aside from that, the only major option is carbon ceramic brakes at a staggering $18,500, and an M5 Touring wagon costs $263,900. 

Though the M5 is more expensive than Audi’s closest rival, the RS6, the gulf isn’t huge considering you get a lot more punch in the BMW. Mercedes-AMG does not have an E-Class answer, yet.

Good value, then? Well, an equally potent Porsche Panamera is twice the price. So yes, in a sense.

Under the GT-Line's bonnet is Kia's Theta II 2.0-litre four-cylinder turbocharged engine. It's the same as before, with a stout 182kW and 353Nm. Driving the rear wheels is an eight-speed automatic from the Hyundai-Kia empire.

It's pretty rapid, knocking out the 0-100km/h spring in just six seconds, a mere 1.1 seconds slower than its faster sibling's 4.9 for the benchmark.

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.

Kia's claimed combined cycle figure is 8.8L/100km. As the Stinger goes without trickery like stop-start or mild hybridness, it's no surprise that my week with it yielded an indicated 10.4L/100km, which isn't bad for a 1750kg sports sedan that was not molly-coddled and also spent some time in a resurgent case of crap traffic in Sydney.

It also drinks standard unleaded, which is a nice touch.

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.

I have driven and loved the Stinger GT. It's tremendous fun, goes like a rat running away from a cut snake, which itself is being chased by a mongoose with its bottom on fire, and it handles like a proper sports sedan.

The GT-Line is obviously not that quick, but it's not slow, either. But it does take a bit of the GT's DNA and delivers a driving experience eerily reminiscent of an E90 BMW 3 Series. That seems like an out-of-date reference, but it was a beautiful car to drive with a lovely balance of ride and handling.

The steering has good feel and you know what's going on underneath the front wheels. You sit towards the centre of the car, also a BMW trademark. Turn the wheel and the car goes with you, despite its bulk, and it's happy to dance a bit with its limited-slip diff.

The 2.0-litre turbo does a good job in most conditions but you feel it coming up short when you're hustling it. It's never breathless, but the torque deficit to the turbo six is clear. If you've not driven the faster Stinger, you may not notice, but there's a touch of lag in the 2.0 that contributes to the idea it's working hard to move the big sedan.

But back off a little and it becomes a fluid, fun drive. In town it's firm but very comfortable, gently bumping rather than crashing into potholes. The rear suspension is a complicated five-link set-up that costs money and eats into boot space but delivers the goods.

Given its length the Stinger is a bit tough to manoeuvre in tight spaces and its 11.2m turning circle isn't too flash either, but you soon get used to it.

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.

The regular BMW 5 Series range scored a maximum five stars in 2023 ANCAP safety testing but this does not apply to the M5.

The M5 features nine airbags and a host of active safety systems, including auto emergency braking (AEB), blind-spot monitoring, rear cross-traffic alert, lane-keep assist, auto parking and speed limit assist. 

Lane-keep can easily be turned off via two taps but the other systems require more menu navigation, though are mostly unintrusive. A 'Track' mode disables lane-keep, AEB and other systems along with switching the central display off. 

Kia's ground-breaking seven year/unlimited kilometre warranty along with roadside assist for the first 12 months. Each time you service your car at Kia, you get an extension on your roadside assist for up to eight years.

Perhaps the only thing that makes you go, "Oh, what?" about the Stinger is the 12 months (Good)/10,000km (Oh...) service intervals. That's pretty common with Kia's turbo engines but is a little inconvenient. Then there's the cost - prices range from $312 to $685, which adds up to $3459 over the first seven services. If you stay under 10,000km/year, that's not bad going at under $500 per year for servicing, but if you're a high-miler, it will add up.

The servicing isn't outrageous - and the prices are capped - but it's not cheap, either.

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.