Mercedes-Benz AMG GT vs Chevrolet Silverado

What's the difference?

The GT63 4Matic+ is a breathtaking example of everything that Mercedes-Benz and AMG are.

Ferociously fast, incredibly agile and superbly sophisticated, it should be on anybody’s shortlist, if that also includes a Porsche, Aston Martin, Maserati or even a Lamborghini. And it’s definitely much more than yesterday’s SLC ever was – for similar money in today’s terms, as it turns out.

But, around Tasmania’s glorious roads at least, the Mercedes-AMG lacks the ride comfort and road noise isolation to be a fully-rounded-out GT, and that’s a disappointment for a brand with such formidable history in making such cars.

With its unique V8 soundtrack, all-terrain capabilities and sumptuous comfort, the ZR2 is a quintessential American muscle truck that's as capable of carting crews and accessing rugged worksites during the week as it is towing boats, horse-floats and caravans or getting muddy on weekends. For either work or play, there's a lot to like here.

This is still clearly a Mercedes AMG GT coupe, like the 2014 C190 original, but a ground-up redesign sees it subtly yet significantly altered.

Some 270kg heavier than before, the larger-in-every-dimension body combines aluminium, steel, magnesium and fibre composite materials for improved rigidity and a lower centre of gravity. Length (4729mm) and wheelbase (2700mm) have been stretched by 177mm and 70mm respectively. Width (1984mm) and height (1352mm) are also up.

The nose treatment is similar to before, especially with the bulgy bonnet and signature vertical slatted grille fitted. These, combined with the LED digital headlight shape effect, is reminiscent of, but far-better executed than, the goofy-looking MG5’s face.

Underneath, it's an all-new platform shared with the SL, with the rear transaxle of the old car replaced by a permanent AWD system, leading from 46:54 front/rear weight distribution to 50:50 as a result.

That aggressive, exaggerated cab-backward/ultra-long bonnet silhouette that visually connected it with the SLS gives way to more-conventional and practical coupe proportions that is striking if not especially original, since they do look quite 911-esque. Along with the longer wheelbase and wider tracks, the result allows for two small rear seats to be fitted, while liftback cargo access remains.

Similarly, in the name of way-more usable interior packaging, Mercedes-AMG says it pushed the driving position nearly 180mm forward compared to the previous GT. Let’s see what that all looks like inside.

The Silverado’s extensive remanufacturing to RHD, performed on a purpose-built production line in Melbourne, meets OEM standards of fit and finish.

As the off-road focused 1500 model, the ZR2 has hardware and detailing consistent with its rugged bush-bashing persona, highlighted by aggressively treaded mud-terrain tyres and unique raised suspension with high performance dampers.

Other ZR2 features include a raised bonnet with ZR2 applique, ‘off-road cut’ front bumper, bash plates, black grille with ‘Flow Tie’ (flow-through) bow-tie motif, ‘Performance Red’ chassis-mounted front recovery hooks, concealed dual-outlet exhaust, black fender flares/door handles/bumpers/window surrounds and chrome ZR2 badges.

It has a tough and purposeful look with bluff-fronted styling and an imposing stance. 

An expansive length of almost 6.0 metres (5931mm) and a 14.4-metre turning circle highlight formidable (and at times impractical) dimensions for urban life.

The cabin is spacious and airy with a tasteful blend of contrasting tones and textures combined with many soft-touch surfaces, yellow stitching along seams and splashes of chrome and satin chrome creating a plush look and feel.

The first impression inside is that of space, despite the falling roofline and coupe-like upsweep of the side windows and you look back. While, again, similar to a 911s, a kink at the door gives the GT a unique character.

Even larger people will appreciate the generous amounts of room up front, with space to stretch, sat in sumptuously comfy bucket seats. Note that the standard ones are better than the racier but firmer Sports versions.

The driving position is perfect, ahead of a dashboard that is very typical modern Mercedes in appearance and layout.

To that end, the tablet-style integrated touchscreen (11.9 inches) is clear, fast and intuitive once time is taken to learn it. And points are also won for the multi-configurable electronic instrumentation, that allows for a variety of screens, including track, classic and minimalist views.

The trademark turbine air vents, the quite beautiful material and trim finishes and just the general solid feel are further typical contemporary Mercedes cabin treatments, as are the excellent ventilation and ample storage options.

And while rear vision isn't great, that's what cameras are for. It's all pretty much on brand.

It is a shame, given how elevated the Mercedes-AMG engineering is underneath, that the GT’s interior look and ambience is so similar to those of a (albeit higher-spec) C-Class or GLE. It's simply not as special as some of the company’s previous sports cars.

More annoyingly, the ride is too firm and bumpy for a GT, and this has the unhappy effect of provoking random rattly trim sounds within the cabin. It’s a bit like scrunched-up cellophane. In a $420K (as tested) Merc, that’s very disappointing, especially as it can be heard over the copious amount of road and tyre noise droning through, particularly on coarser bitumen surfaces.

Further back, the rear seat is strictly two-plus-two, and nobody over 150cm tall is recommended to travel there by Mercedes itself. That sloping roofline is the culprit. That said, brief trips with a bowed head are possible, as the fixed cushions and split-folding backrests are actually surprisingly comfy. But only for short journeys. Kids should love it though, and the second row does open up the GT’s usefulness enormously.

As does a near-doubling of the AMG’s cargo capacity, jumping 146 litres to 321L with backrests erect, to a whopping 675L (+325L) in two-seater mode. The flat floor is accessed via a large electrically-operated liftback door, offering quite a large aperture for easy loading/unloading.

Having no spare wheel helps here, with a tyre inflation kit included in lieu of that.

Meanwhile, at the front, under the bonnet, things have definitely changed for the better as well.

The ZR2’s hefty 2587kg kerb weight and 3300kg GVM results in a 713kg payload, which is modest given a seated crew of five big tradies could use up about two-thirds of that payload capacity before loading any of their gear.

It can also legally tow up to 3500kg of braked trailer on a 50mm ball and up to 4200kg on a 70mm ball. The latter figure is 300kg less than the LTZ due to the specialised off-road suspension.

However, given the ZR2’s 6851kg GCM rating (or how much it can legally carry and tow at the same time), you would be left with a mere 64kg of vehicle payload if you wanted to tow the maximum 4200kg.

That’s barely enough for a driver - and a light one at that. Fact is, few if any owners in real-world use would need to tow 4200kg, but it’s important to be across these legal limits if you’re planning to.

The load tub is protected internally by a spray-on liner and offers almost 1.8 cubic metres of load volume. Its load floor is 1776mm long, 1813mm wide and sits 569mm deep, with 1286mm between the rear-wheel housings. More than wide enough for hauling Aussie or Euro pallets.

There are also 12 load-anchorage points, power assistance for lowering the tailgate and a tub camera to keep an eye on loads when driving. The rear bumper provides surefooted tub access using either the centre step or concave side-steps.

All occupants enjoy luxurious space, particularly rear passengers thanks to easy entry created by the wide-opening doors, a flat floor with no transmission hump for the centre passenger to straddle and palatial head and legroom even for tall people. Combined with ample shoulder room, a full crew can travel in enviable comfort.

Cabin storage for the driver and front passenger includes two bottle holders and a bin in each door. There’s also a large glove box and the centre console has an open tray and two USB ports up front, two bottle holders in the centre and a big box at the back topped by a padded lid that provides comfy elbow support.

Rear passengers get a bottle holder and bin in each door, plus more USB ports and two more pairs of bottle holders in the rear of the centre console and in the bench seat’s fold-down centre armrest.

There’s also storage pockets on both front seat backrests and handy compartments for small items are cleverly concealed within the rear seat’s upper-backrest cushions. Its 60/40-split base cushions can also swing up and be stored vertically if more internal load space is required, or to access ample under-seat storage.

Our 1500 ZR2 test vehicle, like its LTZ Premium sibling, comes standard with GM’s thumping 6.2-litre petrol V8 paired with a 10-speed automatic and multi-mode 4WD transmission for a list price of $144,900.

Our example is also fitted with several items from the GMSV genuine accessory range including the tri-fold tonneau cover, side rocker protectors (aka rock rails) and matching removable side-steps. It’s also finished in 'Riptide Blue Metallic', which like the accessories is available at extra cost.

The ZR2’s standard equipment includes 18-inch gloss black alloy wheels with chunky 275/75 R18 Goodyear Wrangler Mud-Terrain tyres and a full-size alloy spare, LED headlights/DRLs/tail-lights, load tub camera, spray-on tub-liner with ZR2 logo, power tailgate, 4500kg towing kit including towbar, 12-pin harness and electric trailer-brake controller, 360-degree camera with up to 14 views and lots more (see Design).

Climb aboard the sumptuous interior with its keyless opening/start and you’re treated to a heated leather-wrapped steering wheel with power tilt/reach adjustment and multiple remote controls, leather-appointed and heated/cooled driver and front passenger seats with 10-way power adjustment and memory settings, heated rear seats, power sliding rear window, dual-zone climate control, front and rear USB ports and lots more.

The high-feature dash includes a colour 12.3-inch configurable driver’s instrument display and 13.4-inch multimedia touchscreen that controls, among other things, the Bose premium sound and wireless Apple CarPlay/Android Auto connectivity. The driver also has a choice of adaptive and non-adaptive cruise control plus there's a head-up display, switchable rear-view mirror camera function, tyre pressure monitoring and lots more, including the recent addition of standard front parking sensors on the ZR2.

Owners who need to tow will appreciate the reversing camera with hitch guidance and view, in-vehicle trailering app with different trailer profiles, trailer theft alert, automated trailer lighting test and a GCM alert.

There’s a plaque signifying which engineer “handcrafted” the GT’s engine – in this case, the famous M177 in 3982cc, 4.0-litre twin-turbo intercooled V8 petrol guise.

Delivering 430kW of power at 6500rpm and 800Nm of torque from 2500-4500rpm, it sends drive to all four wheels via a nine-speed multi-clutch transmission (dubbed MCT in AMG-speak), catapulting the GT63 4Matic+ from 0-100km/h in just 3.2 seconds, on the way to a top speed of 315km/h.

How does it do that?

With AWD, the GT is now nearly 15 per cent heavier than before, but it still manages a punchy 218kW/tonne. Active aerodynamics over, inside and under a more-rigid body structure also helps.

The AMG 4Matic+ AWD system goes from 50/50 front/rear, to 100 per cent rear, variable torque distribution according to conditions and settings, and backed up by an electronic limited-slip differential. Among the many driving settings are Race Start, Drift Mode and good-old Comfort, if it all becomes too much.

Also keeping all that performance in check is a high-performance composite brake setup with improved cooling for faster responses.

Interlinked active roll bars improve body control, the five-link independent suspension features adaptive dampers for a softer ride.

And, as for that 4WS tech, the rear wheels steer opposite to the fronts at up to 100km/h (by some 2.5 degrees) for tighter and tidier handling, or 0.7 degrees in the same direction above 100, for greater stability and road-holding.

Its effect on the way this near-two-tonne coupe zigs and zags around corners is something you need to experience to really appreciate.

Like the LTZ, the ZR2 is powered by a 6.2-litre petrol V8 producing 313kW of power at 5600rpm and 624Nm of torque at 4100rpm. It features cylinder deactivation to optimise fuel economy when full power isn't required.

This is paired with a refined 10-speed torque converter automatic, armed with an auxiliary external oil cooler ideal for heavy towing duties and off-road slogging. It also offers sequential manual shifting using steering wheel-mounted paddles and there are numerous selectable drive modes.

Its dual-range transfer case with push-button control offers the choice of '2WD High', '4WD High', '4WD Low' and '4WD Auto', with the latter being a full-time torque-on-demand system. It’s also equipped with driver-selectable front and rear locking differentials for optimum traction in the rough stuff.

Actually, the GT’s economy isn’t horrendous considering how fast it can go.

Even blasting a few times around beckoning country roads, we managed an indicated 13.0L/100km, which is an improvement on what Mercedes-AMG says the GT averages the 14.6L/100km average that Mercedes-AMG officially states.

That translates to a carbon dioxide emissions rating of 334g/km.

Using 98 RON premium unleaded petrol, an average of just under 480km between refills of the 70L tank is possible. The urban run sees consumption rocket to 21.8L/100km (for just 321km of range), or 10.4 out on the highway run, meaning that over 670km is possible should you decide to drive in a docile manner.

GMSV claims official combined cycle (urban/extra-urban) fuel consumption of 12.7L/100km and the dash display was showing 15.3 when we stopped to refuel at the completion of our 397km test, which included our usual mix of suburban, city and highway driving of which about half was hauling a variety of payloads.

This compares to our own figure, calculated from fuel bowser and tripmeter readings, which was higher again at 16.8L/100km. That exceeds the usual 2.0-3.0L/100km discrepancy between official and real-world consumption but is still acceptable for a 2.5-tonne pick-up powered by a big petrol V8 in urban use.

So, based on our real-world consumption figure, you could expect a driving range of around 540km from its relatively small 91-litre tank.

Nobody will drive the GT63 4Matic+ and think, ‘Oh, this is OK’, because its breadth of performance is phenomenal.

No matter which mode you're in, from Comfort through to track-tuned Race, the Mercedes-AMG blends forceful pace and commanding control without ever breaking a sweat.

Flex your right foot and the two-tonne coupe bounds into action like a giant on a mission, striding past posted speed limit signs in nanoseconds and way, way faster than the law will stand if diligence isn’t exercised.

And there’s no point relying on seat-of-your-pants sensations, either, because the chassis below embraces the road with an almost zealous devotion. Which is astounding, given how agile the four-wheel steering-enhanced handling is.

The 63’s super power is exactly that – it dulls your sense of speed. One tester admitted to exceeding 150km/h before noticing. An odd confession considering the sonic boombox that is the bi-turbo V8’s howl.

But jailbait performance is not even the 63’s most lingering joy. That would be its steering perfection, that delivers that rare trifecta of keenness, crispness and communication. The wheel feels eager and alive in your hands, even when powering between tight turns, backed up by sensational grip and control. How can a two-tonne GT handle so sharply?

Warm, dry roads were the order of the day, so we can’t tell you how the 4Matic+ permanent AWD system deals with wet or slippery surfaces, but the slick multi-clutch transmission, seamless torque-vectoring tech and sticky tyres more than cope with the 63’s formidable outputs.

So, that's the gushing part out the way, then.

Despite the adaptive dampers, rigid architecture and exquisitely sophisticated suspension, the ride is simply too stiff in Comfort mode, and downright jittery on some of the Tasmanian roads we tested on, for the 63 to be considered a true luxury grand tourer. It just isn't comfortable, luxurious or supple enough.

Plus, grippy as they are, the 21-inch wheels transmit too much road and tyre noise through to the cabin, meaning that the GT isn't as quiet as you'd hope. Add the aforementioned trim squeaks, and the expected cocooned silence isn’t always there.

The upshot is that the 63 possesses more of a sports car character than a luxury GT character. Great news if you're a 911 type buyer and are seeking a high-performance 2+2 alternative, but a disappointment if comfort and refinement are priorities.

Still, it is impossible not to be deeply moved by this Mercedes-AMG.

The ZR2’s raised off-road suspension requires more of a climb aboard than the LTZ, but the low-slung removable side-steps fitted to our test vehicle certainly make boarding easier and are an accessory worth considering if most of your driving is on-road.

There are large handles on the truck’s A- and B-pillars to assist entry to the cabin where the driver is treated to multiple power adjustments of seat and steering wheel plus a large left footrest, which together provide a very comfortable driving position.

The ride and handling are outstanding, as the ZR2’s suspension combined with the additional cushioning of its baggy all-terrain tyres is commendably supple over bumps, yet it's surprisingly responsive to steering input without the ponderous feeling expected in a vehicle of this size and weight.

This response is optimised when the ‘Sport’ mode is selected as it sharpens steering, brake pedal feel and suspension tuning for a more engaging drive. It also activates the louder and freer-flowing exhaust setting and modifies the auto’s shift calibration, which allows the V8 to shine with a guttural roar under full throttle that is not only an aural delight but can quickly reach triple-digit speeds with remarkable ease.

By contrast, it can also deliver relaxed and fuel-efficient highway travel thanks to the V8’s auto cylinder deactivation and less than 1500rpm being required to maintain a leisurely 110km/h. Engine, tyre and wind noise are negligible at these speeds.

To test its payload rating we forklifted 475kg into the load tub which combined with our crew of two equalled a total payload of 655kg that was within 60kg of its legal limit.

The rear leaf-springs only compressed abut 35mm under this loading, which left more than enough bump-stop clearance to ensure there was no bottoming out on our test route. The ZR2 performed so effortlessly with this payload it was easy to forget we even had one.

Our only criticism of the driving experience was the tri-fold tonneau cover. When hauling loads, this accessory is designed to fold forward into a flat bundle that leans against the rear of the cabin with two adjustable struts to brace it in place (see photo).

This worked fine during suburban driving up to 80km/h but was not suited to higher speeds, as the increased air pressure made it flex enough to block the rear-view mirror's camera view. So, an alternative tonneau design would be preferable for those needing to do lots of highway travel with uncovered loads.

There are currently no ANCAP star ratings for full-size US pick-ups. However, Australia’s vehicle safety authority has acknowledged the growing popularity of these vehicles with its inaugural ‘Large Utilities ADAS Safety Comparison’ to provide local consumers with comparisons of Advanced Driver Assistance Systems (aka crash-avoidance technologies).

The Silverado 1500 range (February 2025-build onwards) earned the minimum bronze grading, with its score of 27 per cent being the lowest of all vehicles tested. By comparison, Ford’s F-150 earned the highest score with 81 per cent and premium platinum status.

Even so, the ZR2 has an extensive active safety menu including forward collision alert with low-speed AEB, lane-keeping, blind-spot monitoring (which expands to include trailers), rear cross-traffic alert, front/rear parking sensors, plus a 360-degree camera view (with up to 14 views) and more.

It also has six airbags including side-curtain protection for all outboard seating positions, plus ISOFIX child-seat anchorages on the two outer rear seating positions and three top-tethers.

What’s the GT like to own?

Mercedes-Benz offers a five-year/unlimited km warranty, with five years of roadside assistance. This is average for most mainstream and luxury brands, but superior to most sports-car makers like Porsche and Lamborghini.

Intervals are every 12 months or 20,000km, and while no capped-priced servicing is offered on the GT, pre-paid three-, four- or five-year service plans are available, ranging from $5165, $7700 and $8665 respectively.

Big performance demands big maintenance bills, it seems.

Now comes standard with a class benchmark five years/unlimited km manufacturer warranty, plus five years of roadside assist.

Scheduled servicing is every 12 months/12,000km whichever occurs first, but there's no capped-price servicing. Expect a three year service bill of around $2000, which isn't outrageous for a vehicle of this type.

GMSV has an Australian network of 50-plus dealers across most states and territories and all dealerships can provide vehicle servicing.