Land Rover Defender vs Mercedes-Benz GLC-Class

What's the difference?

The Land Rover Defender Octa Black could well be the ultimate form of the Defender. There's also the combination of Land Rover style and utility, but with one of the best V8 powerplants gifted to it from BMW. The Black edition adds extra appeal and highlights how stealthily something this good can fly under the radar against rivals like the Mercedes-AMG G63.

Like I said right from the start, this new, hybrid version of the AMG GLC63 is technically superior to the model it replaces in every meaningful way. It is faster, more powerful and more fuel efficient and therefore a better performance SUV than the model it replaces.

Is it a better model than the one it replaces? Ultimately that will come down to how much stock you put into the soundtrack and your feelings on an AMG not powered by a V8 engine.

Because if you can see past that, then the AMG GLC63 is an absolutely fantastic performance SUV. Not only does the new powertrain make it faster in a straight line, but the chassis is very well-balanced, making for an engaging driving experience.

For those who can look past the smaller engine they will be rewarded with an incredibly fast and rewarding-to-drive member of the AMG family.

Note: CarsGuide attended this event as a guest of the manufacturer, with travel, accommodation and meals provided.

Oh gosh yes, there’s a lot that’s interesting about the design of the Defender Octa Black. 

Land Rover absolutely nailed the look of the new Defender when it launched in 2020 and it's barely aged in the years since. 

I love its modern take on the original Defender design with its boxy styling that looks both prestigious enough to be waiting in the driveway of a castle, but also purposeful and practical enough to be sitting in a paddock on a farm.

The Octa is based on the 110 Defender four-door body style with five seats, but its muscular enhancements make it longer, wider and taller than a regular 110 Defender. 

The Octa Black has exactly the same dimensions as the Octa at 5003mm long including the tailgate-mounted spare wheel, 2105mm wide with the mirrors out, and 1995mm tall on the low suspension setting (air suspension can raise the vehicle much higher).

The Octa Black adds about 30 gloss black or satin black elements to the Octa and I’ve listed many of them in the features section above.

For me the highlights of the Black include the 20-inch forged wheels which look stylish and army tough, there’s also the black coating on the quad exhaust tips, while the blacked-out badging and lettering also gives this variant a carefully modified, stealthy look.

Inside I love the exposed screws in the door trim, and black dashboard hand rail. When the vehicle is switched off all of the black buttons lose their glowing icons, turning the cabin into an inky, luxurious, minimalist space.

I could go on about the safari windows overhead in the boot area, the thick carpet, and how the optional chopped carbon fibre looks like solid marble, but we need to move on. 

The GLC63 is unmistakably an AMG from the moment you first lay eyes on it. That’s thanks to the AMG-specific elements, starting with the grille with vertical strikes and the AMG crest on the bonnet; which is now a signature item for the performance sub-brand.

The GLC63 is also fitted with the Night Package II design kit; this adds a darkened grille and black chrome badging to further enhance its visual appeal.

The AMG-specific alloy wheels and more aggressive stance do mean the GLC63 stands out from the rest of the GLC range, helping it look fast even when it’s standing still.

The Defender Octa Black is practical by its design and intention. This is a large off-road SUV with boxy proportions and utility is as much a priority as luxury.

A five seater with no third row, the Defender Octa Black has an enormous boot at 972 litres and outstanding cabin storage throughout from large door pockets to stowaway areas, trays and hidey holes. There’s also a small fridge under the centre armrest between the front seats.

Space for passengers is excellent with ample headroom and rear legroom. I’m tall at 188cm and can easily sit behind my driving position. Upfront and sitting in the driver’s seat I have acres of room in the footwell, plenty of space for my legs to clear the steering wheel and lots of elbow room.

There are power outlets throughout including a 230V powerpoint in the boot, USB-C ports in the second and front rows, plus wireless phone charging up front.

How great it is to see big chunky physical dials for climate control and volume as opposed to just a media screen, which is the case with so many new vehicles.

Possibly the only impracticality of the Defender Octa Black is the drop down out of the cabin. Even on the lowest air suspension setting the step up and out of the cabin will be too big for some older people and younger children. 

Inside the GLC63 is clearly a derivative of the rest of the range, with its C-Class-inspired design and layout, but there’s enough AMG-specific elements to ensure it looks and feels special. This starts with the AMG steering wheel, which comes not only with a thick rim wrapped in Alcantara, but also some AMG special dials to adjust the various performance settings for the powertrain, suspension and transmission.

Then there are the AMG-specific seats, which look good and offer good support for the driver and front seat passenger. The rear seats offer decent space for what is a mid-size SUV, with room enough for two adults or teenagers or three smaller kids.

Those in the back aren’t particularly well looked after though, with only rear air-con vents and small door pockets but no USB charging ports or other small item storage.

The boot is 590 litres, down from 620L in the rest of the range, thanks to the addition of the rear-mounted electric motor. There’s also no room for the temporary spare the rest of the GLC range gets and instead you have to make do with a puncture repair kit.

The power and torque figures aren’t the only numbers that have risen sharply, with the GLC63 clearly impacted by a double whammy of inflation and the usual new-car price rise.

The GLC63 now starts at more than $191,814 for the SUV and $198,415 for the Coupe, which represents a nearly $30k increase over the old V8-powered model, which was priced at $164,600 just two years ago. Even for luxury car buyers that’s a big jump, especially when you’re trying to convince people of the merits of the four-cylinder powertrain. 

That also means it's more expensive than all of its key competitors, including the BMW X3 M Competition, Maserati’s Grecale and the outgoing, petrol-powered Porsche Macan GTS.

To help explain some of this price increase Mercedes-Benz Australia has opted for a high level of standard specification for local cars. Standard equipment includes 21-inch alloys, AMG composite braking, a panoramic sliding sunroof, a unique AMG steering wheel, power-adjustable sports seats in Nappa leather, a head-up display, dual-zone climate control, wireless smartphone charging and a Burmester 3D Sound system.

Also included is the AMG Track Pace suite, for those who want to unleash their GLC on the racetrack.

There’s also a limited run, AMG Edition 1 Package available too, for an additional $12,900. On the outside you get Manufaktur graphite grey magno paint, foiling with colour gradation and large AMG logo on the sides, an AMG Aerodynamics Package, unique alloy wheels with Edition 1 and AMG branding, yellow brake calipers and an AMG fuel filler cap in silver chrome with AMG lettering. 

Inside there’s AMG Performance seats, AMG Nappa leather in black with yellow contrasting stitching, AMG illuminated door sills,  carbon-fibre AMG trim highlights, yellow seat belts and a unique AMG Performance steering wheel wrapped in carbon-fibre and microfibre.

One of the Defender Octa’s biggest drawcards is its engine, a 4.4-litre twin-turbo V8 courtesy of BMW.

Yes this is a BMW-sourced V8 making 467kW and 750Nm. The same engine is found in BMW’s M5 super saloon and X5 M and it suits the Defender Octa Black so well you’d swear it was purpose built for the big SUV.

You might not know that there is also a mild hybrid system on board too, but it doesn’t drive the wheels and isn't really there to save fuel. Its function is to add even more grunt to the engine. 

Unlike Mercedes-AMG's G63’s V8, the Defender Octa’s V8 won’t traumatise the neighbourhood on start up or idle or even just cruising along. But push it hard and it changes its attitude from a powerful limousine growl to a wild NASCAR roar.

There are drive modes including a dynamic setting but it’s ‘Octa’ mode that makes the car special. It's is a high-performance off-road setting that does exactly what you’d think.

Of course the Defender is one capable off-road vehicle with low- and high-range four-wheel drive.

An eight-speed automatic transmission sends the drive to all four wheels smoothly and the paddle shifters allow quick changes up and down.

This is what lies at the heart of the AMG GLC63’s success or failure. As I mentioned at the beginning, the previous generation’s 4.0-litre twin-turbo V8 has been replaced by an F1-inspired plug-in hybrid powertrain.

But don’t think that means AMG is suddenly focused on efficiency over performance. When AMG says the powertrain is inspired by the brand’s success in Formula 1 racing, what it means is the battery and electric motor provides a significant performance boost to support the internal combustion engine, not just save fuel.

To that end the combination of the turbocharged 2.0-litre four-cylinder petrol engine and the rear-mounted electric motor produces an impressive 500kW and 1020Nm. That’s a massive jump over the 375kW/700Nm made by the outgoing V8.

Nobody buys a large off-road SUV powered by a petrol V8 thinking it’s going to be super fuel efficient, right? Just checking, because the 4.4-litre petrol V8 in the Defender Octa Black needs feeding constantly, like some kind of huge, hungry animal.

My average fuel economy of 18.5L/100km (according to the trip computer) over nearly 500km of driving actually wasn't as high as I expected considering all the countryside I ran through combined with the urban warfare of heavy traffic. Still that’s much higher than the 13.1L/100km Land Rover says the Octa should do in combined driving conditions. 

Fortunately the Octa has a 90L fuel tank so you won’t have to fill up at every petrol station you see.

Mercedes makes no secret that the battery is designed for performance, not saving fuel. It only has a 14km EV range but can recharge quickly on the move to provide a power boost when needed.

But despite all that, the GLC63 is actually significantly more fuel efficient than the old V8, using a claimed 7.3L/100km, which is a massive 4.9L/100km improvement over the old model. Although, on our day-long test drive we didn’t manage to come close to that claimed figure and instead saw returns around 11L/100km, albeit after a lot of spirited open-road driving.

The Defender Octa Black is big but it only takes a week of driving before it feels like an extension of your body and becomes an easy and obedient thing to pilot.

The acceleration is strong with 0-100km/h coming in four seconds but it's how it handles that's really impressive.

Smart so-called '6D suspension' uses adaptive tech to keep the vehicle level, damping its desire to pitch forward under braking and preventing body roll in the corners. I tested this on my remote winding, bumpy test road and was amazed by this big monster’s ability to keep itself composed and flat despite the sudden changes in direction.

There was no off-road test for the Octa Black this time but we've been impressed with the capability of Defenders in our tough terrain tests in the past. The Octa Black’s air suspension can rise high enough to offer a maximum 323mm of ground clearance. Angle of approach is 40.2 degrees and departure is 42.8 degrees, while the ramp over angle is 29 degrees. Wading depth is 1000mm.

And if you’re towing, braked towing capacity is 3500kg.

We tested the Octa Black for its handling of both engaging roads but also its handling of suburban duties where it proved easy to pilot, towering over the traffic but still able to slip up tight streets and in and out of car parks (check the maximum headroom and keep the suspension low), along with the school run each day.

Built for off roading means visibility is excellent, from being able to see clearly where the vehicle begins and ends to the huge windows that means there’s hardly a blind spot.

That made parking easy as long as there’s a space large enough and trust me, even if you take your time to park, nobody will honk at you in this military-grade looking rig.

All the while the air suspension kept the ride comfortable and serene.

Anyone who still believes in the adage ‘there’s no replacement for displacement’ hasn’t driven a modern turbocharged and hybridised engine. The GLC63 is a demonstration of the metaphorical and literal power of modern technology, combining an extremely efficient and potent internal combustion engine with an electric motor to make enormous real-world performance.

To be blunt, the GLC63 feels like a rocketship out of corners, launching with a ferocity and relentlessness the old V8 simply can’t match. It shouldn’t come as a surprise, a mid-size SUV with 1020Nm was always going to have plenty of performance, but even so it’s a shock to the system every time you give the GLC63 full throttle. Officially AMG claims it takes just 3.5 seconds to run 0-100km/h and has an electronically limited top speed of 275km/h - mighty impressive figures for a five-seat mid-size SUV.

To help get all that torque to the road, AMG deploys torque distribution technology that allows for it to be split an even 50/50 front/rear all the way to 100 per cent to the rear tyres.

Other technologies deployed to enhance its handling include AMG Ride Control suspension with adaptive damping and rear-axle steering. There’s also eight AMG Dynamic Select driving modes and four AMG Dynamics settings (Basic, Advanced, Pro and Master), so it’s a complex vehicle that is designed for the enthusiast.

While it’s easy to drive around town, once you get out on the open road you can really get a sense of the GLC63’s performance potential. Beyond just its powertrain the suspension offers good body control and the rear-axle steering helps it feel agile and responsive. 

It’s not perfect though. At times the complexity of the system does lead to some hesitation when you put your foot down. It certainly lacks the linear power delivery of the old V8 and makes for a slightly trickier driving experience at times.

As for the sound, which is one of the biggest elements missing from the V8, Mercedes has added AMG Real Performance Sound, which features a pressure sensor in the exhaust that picks up on the engine note and plays it through the speaker system. It certainly helps make for a louder, more noticeable engine noise, but it still sounds more like an A45 than the previous GLC63 and for many would-be buyers, that’s a major turn-off.

The GLC63 comes standard with a comprehensive suite of safety features including 'Distronic' (Mercedes’ name for adaptive cruise control), 'Active Lane Keeping Assist', 'Blind Spot Assist', 'Traffic Light Assist' and 'Adaptive Highbeam Assist'. It also includes Mercedes’ 'Pre-Safe' accident anticipation system - which pre-tensions the seat belts and will even play a white noise to protect your ears if it senses a crash is imminent.

A parking system that includes a 360-degree camera and active parking assist is also included.

The GLC range was awarded a five-star ANCAP rating in 2022, which pre-dates the latest testing protocols, so doesn’t provide a like-to-like comparison for vehicles tested after that date.

Land Rover covers the Octa Black with a five-year, unlimited-kilometre warranty which is short compared to most mainstream brands but fairly common among the high-end makes.

Roadside assistance is included for five years, too.

A service plan is available with five years costing $4800. Again, quite common for prestige brands but expensive compared to the more mainstream makers.

The GLC63 is covered by Mercedes Australia’s usual five-year/unlimited kilometres warranty.

As for maintenance, Mercedes offers service plans, spanning three to five years. Three years will cost you $5025, $6455 for four years and five years is priced from $7180. Servicing intervals are 12 months or 20,000km, whichever comes first.