Mercedes-Benz G-Class vs Land Rover Defender

What's the difference?

As per the 1979 original, the current G-Class is produced by Magna Steyr in Arnie’s home town of Graz in Austria. And many fundamental things haven’t changed since then. But clearly this EV monster’s exotic electric powertrain is a huge departure.

It retains impressive off-road ability and straight-line speed. But will it hit the mark with top-end luxury 4WDers? Short story, this thing is wild, and it will be irresistible for a likely narrow band of tech-focused ‘must have the latest and greatest’ buyers. Nothing like impressing friends and family with a tank turn.

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

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.

Okay, so Mercedes-Benz says, with a straight face, that “with the aim of optimising the vehicle’s aerodynamics” classic G-Class elements have been revised, including the reprofiled bonnet, ‘air curtain’ vents in the flares over the rear wheel arches, A-pillar cladding and the small spoiler on the edge of the roof.

At the same time, the 20-inch wheels are also claimed to be "aerodynamically optimised” and underneath, a 26mm underbody casing made from a mix of materials, including carbon-fibre (attached to the ladder frame with more than 50 steel screws), protects the battery from dust, dirt and rocks.

In ticking off the Edition One, car-spotters should look for black rims with blue brake callipers behind them, blue inserts in the exterior protective strips as well as black door handles and a new rectangular design box on the rear door for storing items such as charging cables, tools or snow chains. If you want a spare wheel, choose the standard model.

An optional black-panel radiator grille ($3800) features tinted lighting units as well as an animated LED light band and chrome surround. The light band can be activated as a running light or an animation when locking and unlocking the vehicle.

And it’s worth noting Mercedes-Benz and the car’s contracted manufacturer, Magna Steyr, have invested much time and many Euros in retaining the car’s classic handle and door lock design. G-Wagen owners will recognise its sound from several kilometres away.

Inside the G580 it’s clear this is one area where the G-Class has progressed enormously over the decades. It’s still quite upright in terms of the dash design, but you’re confronted by twin 12.3-inch screens, supporting the Mercedes-Benz user interface. 

All very high-tech, but that’s balanced by an old-school grab-handle for the front passenger to latch onto during off-road work. 

The signature turbine-style air vents are located within squared-off panels, and in the limited Edition One you have a blue fleck running through carbon-fibre inserts on the centre console, door cards and that front grab handle. In the standard car it’s a (very attractive) walnut open-pore wood rather than carbon.

A luxurious interior for sure.

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. 

For the record, the G63 is just over 4.6m long and a little more than 1.9m wide with a 2890mm wheelbase. So, not huge, but its close to 2.0m height is hard to ignore. 

In the front there’s lots of breathing space, and in terms of storage you have generous bins in the doors with plenty of room for big bottles. Then there’s a centre armrest, which doubles as the top of a deep storage box housing a USB-C port inside. 

A sliding roller cover in the centre console reveals two cupholders, another two USB-C sockets, a 12-volt outlet and a wireless charging pad. Add in a big glove box and you’ve got plenty of options in terms of storage, power and connectivity. 

In the back, sitting behind the driver’s seat set for my 183cm position I’ve got tons of foot and legroom and, no surprise, lots of headroom.

There’s a fair bit of sculpting in the rear seat, which is as nice as it is unusual (makers often avoid bolsters on the rear seat as it makes the backrest harder to fold flat). And in terms of three-abreast accommodation, a smaller adult will be okay in the centre spot for shorter journeys. Three up to mid-teenage kids will be swimming in it.

Then, for practicality you again have generous bins in the doors. And if you need even more capacity, fold down the centre armrest which houses two different size cupholders. 

In the rear of the centre console you’ve got two USB-Cs, a 12-volt power outlet, individual climate control and directional vents.

There are map rockets on the front seatbacks and more air vents in the B-pillar. So, when it comes to comfort, powering up devices and storing ‘things’ you’re well taken care of.

The side-opening tailgate door opens from right to left, which isn’t ideal when parallel parked on the left hand side of the road, but boot volume is over 600 litres (VDA) with all seats upright, expanding to nearly 2000 litres with the 60/40 split-folding rear seat lowered.

There are multiple tie-down hooks, a netted pocket, two lights, a 12-volt outlet as well as a ‘ski-port’ door and sliding cargo cover to enhance practicality and security.

As mentioned earlier, the full-size spare in the standard model, but the Design Box replaces it on the Edition One, although Mercedes-Benz says it’s aiming to make a spare available as an option later in the year.

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. 

The Defender Octa Black lists for $313,800 which is about $10,000 more than a standard Octa. The difference between them is purely cosmetic but the black elements add such a visual impact that $10K seems worth it for the unique customised look that distinguishes it from ‘ordinary’ Defender Octas.

The Black edition adds about 30 elements with either a gloss black or satin black finish. These include the Narvik Black paint, gloss black exhaust tips, 20-inch forged black wheels with gloss black calipers, there’s black badging and lettering, too.

Inside there’s ebony semi-aniline leather upholstery, plus black hand holds and dashboard crossbeam.

Then there’s all the standard equipment you’ll find on a regular Defender Octa. 

There's three-zone climate control, a Meridian sound system, Android Auto and Apple CarPlay, 11.4-inch touchscreen with sat nav, wireless phone charging and head-up display. 

The front seats are heated and cooled, while the second-row outboard rear seats are heated. There’s privacy glass in the rear windows, a panoramic glass roof, LED headlights and tail-lights and a proximity key.

Our car had several options fitted including the chopped carbon-fibre finisher which you can see on the front seat-backs and centre console, dual snorkels, tow-hitch receiver, mud flaps and black roof rails.

Is the value good? Yes' it's very expensive at more than $300k, but the price is quite a bit lower than the Mercedes-AMG G63 ($368,400) and the Porsche Cayenne Turbo GT ($376,200).

The G580 is powered by four permanently excited synchronous motors, each delivering around a CLA200’s worth of power and torque to each wheel for overall outputs in excess of 432kW/1164Nm.

Each motor has its own two-stage transmission and power electronics for almost infinite fine-tuning of the direction and amount of drive sent to individual wheels. Merc calls it ‘individual-wheel drive’.

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.

Housed in a torsion-resistant casing and embedded low down in its ladder-frame chassis, the G580’s 116kWh two-tier, liquid-cooled lithium-ion battery pack delivers a WLTP-rated range of 473km, or 567km on the more lenient NEDC scale.

‘Eco Assistant’ and ‘Range Monitoring’ functions provide continuous information on battery status, energy consumption and estimated range.

Maximum system capacity is 400 volts which enables 200kW DC charging, meaning a 10 to 80 per cent fill in as little as 32 minutes. Maximum AC charging capacity is 11kW.

Claimed energy use is 23.1kWh/100km, and we saw an average of 28.6kWh across urban and highway running on the launch drive program.

Not exactly a ‘green’ EV choice, then, but it’s worth noting a one-year Chargefox subscription is included to off-set the car’s energy appetite.

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.

So, with 432kW and around 1160Nm, even though the G580 weighs in at around three tonnes, you’re talking 0-100 km/h in 4.7 seconds. And this car gets up and goes… like a beast.

What you don’t get is that traditional Merc-AMG G63 V8 rumble, because, of course, no engine. 

But you do get what Mercedes calls ‘G-Roar’, essentially a sound bar at the front of the car also using the audio system inside to give it what is not exactly an engine noise but some sense of the car progressing. And you can turn it off for completely silent running.

‘Electric Dynamic Select’ changes the parameters of the motors, transmission, suspension, ESP and steering as required. On-road that means ‘Comfort’, ‘Sport’ and ‘Individual’ modes, with off-road comprising ‘Trail’ and ‘Rock’. In the Comfort setting drive flows primarily to one axle for optimum energy efficiency.

Suspension is by double wishbones at the front and a De Dion-style live (rigid) axle at the rear. You’ve got the same adaptive-type set-up as per other G-Class models, so ‘Comfort’ and ‘Sport’ modes and of the many traditional G-Class traits this car exhibits, ride quality is one of them.

Even in Comfort you’ll find even little bumps and thumps making their way up into the seat of the pants and the cabin. It is after all a body-on-frame, ladder-chassis type vehicle and that’s not unusual.  

In terms of steering, it’s accurate and road feel is good. You’ve got 275-wide Falken Azenis FK520 tyres that are more on- than off-road focused. The car feels stable and nicely planted on the road.

The physical brakes are by ventilated discs front and rear, and the big rotors are the same size (353mm) all around. They work nicely and feel like a conventional set-up.

Regenerative braking kicks in as soon as you lift off the accelerator pedal. The powertrain is harvesting energy as the car decelerates and there are four levels you can adjust with the steering wheel paddles up to a quite aggressive level - not quite, but close to a single-pedal set-up.

Off-road, the G580’s ‘G-Steering’ system allows the wheels to turn at different speeds to induce slight ‘drift-like’ oversteer and tighten the turning circle. It works beautifully and the car’s fording depth is 850mm, a full 150mm more than internal-combustion G-Class models.

A three-speed off-road crawl function is adjustable to speeds as low as 2.0km/h, and the car is claimed to remain stable on sideways slopes up to 35 degrees. 

Torque vectoring is used to create ‘virtual diff locks’ and there’s a ‘low-range’ setting. Switch to the ‘Offroad Cockpit’ and data including gradient, lateral inclination, compass readings, tyre pressures and the selected G-Mode appear.

A ‘Transparent Bonnet’ function creates a virtual view of what’s approaching and passing under the front wheels to help the driver pick their way through steep ascents or declines.

For the record, the G580’s approach angle is 32 degrees, departure is 30.7, breakover is 20.3 and ground-clearance is 250mm.

And of course, with the wheels independently powered, the G580’s signature move is what Mercedes-Benz calls a ‘G-Turn’ but the rest of the world calls a tank turn.

If you encounter an obstacle that makes forward progress impossible, the system spins the left- and right-hand wheels in opposite directions so this brute can turn on the spot like an M1 Abrams. You can’t help but crack up laughing when executing this extreme party trick!

In terms of miscellaneous observations around ergonomics and the car in general, it has a 13.6-metre conventional turning circle. So if you’re not using the G Turn function in the car park be ready for a sizeable turning arc.

Also, those aero tweaks here and there seem to have had an effect. Wind noise, especially for such an upright, squared-off design is surprisingly modest. And overall, from a build point of view, this car feels as though it’s been carved from a solid piece of metal. In every aspect it presents as a quality item.

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.

The Land Rover Defender scored the maximum five-star ANCAP rating when it was tested in 2020 and that applies to the Octa Black, too. The only catch is that ANCAP rating will expire at the end of 2026. The criteria is now much stricter to get five stars.

That said, of course the Defender is safe, just as cars given a five star rating this year won’t automatically be unsafe in six or seven years, but there will be newer and better safety tech.

Still the Defender has auto emergency braking (AEB), lane-keeping assistance, blind-spot warning and rear cross-traffic alert.

Occupant safety in crash tests also scored high, according to ANCAP.

For child seats you’ll find two ISOFIX points and three top tether anchors across the second row.  

The G580 is covered by Mercedes-Benz Australia’s five-year/unlimited-km warranty, which remains the standard offering in the premium part of the market and an eight-year/160,000km drive battery warranty.

Service intervals are every 12 months or 20,000km with service plan pricing available over three ($2645), four ($3980) and five ($4670) years. In approximate terms, each workshop visit will cost ‘around’ $900. Not exactly cheap, especially for an EV, but this is no ordinary electric vehicle.

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.