Mercedes-Benz AMG GT vs Lexus LC500H

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.

A truly fuel-efficient performance car, who’d have thought? There are some obvious trade-offs for trying to exist in two seperate worlds, but the Lexus LC 500h largely handles its dual roles with aplomb.

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.

It's a little curious, the LC 500h. For mine, it's stunning from a distance. All gleaming alloys and bulging rear arches and sharp snout angled downward like its caught the scent of its prey.

But weirdly, it can start to look a little less impressive the closer you get to it - a little swollen and vague in its lines. It's very likely it's eye-of-the-beholder stuff (fellow CarsGuide scribe Richard Berry adores it from every angle, for example).

Inside, the front of the cabin is a busy but stylish space, with multiple textures layered on top of each other to produce a premium-feeling, sporty space. The low-feeling dash juts out, giving the front passengers an ensconced, cockpit feel.

Everything is predictably leather-wrapped and lovely, and while it's not as streamlined as, say, an Audi interior, it's not without a genuine sense of Japanese charm in the cabin.

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.

It's not really. Especially in the backseats, which would make more sense if they were painted on. I'm no giant, but even my 175cm-tall head was pushed into the ceiling, and while there’s ample shoulder space for two adults, you’re unlikely to be able to convince two to get back there. 

Lexus has included something called the "Easy Access" function for 2020, which sees the front seats slide forward automatically to help with accessing the rear seats, and they do lower the Cirque du Soleil antics required to get back there, but this realistically not a car for carrying more than two adults, save an emergency. There are two ISOFIX attachment points in the rear, so child seats can be locked in there. 

That's not necessarily a drawback, though. This is a two-door sporty coupe, after all, and elsewhere, the sizeable dimensions (4770mm length x 1920mm width x 1345mm height) provide plenty of space for up-front riders.

You'll also find hidden cupholders, bottle holders in the doors, and all the power and connection points you need. 

A word on the tech, though. The LC 500h is crying out for a touch screen, though the brand's traditional mousepad system is improving.

Value is all about perspective, of course, and viewed the right way, the $195k sticker price of the Lexus LC 500h does provide a certain amount of value.

Yes, it's a lot of money. But Lexus' flagship coupe doesn't just get a performance-focused hybrid setup (pairing with a thumping V6 engine), but also just about every high-end feature the brand has in its deep bag of tricks.

It starts outside with giant 21-inch alloys, a glass roof with a sun blind,  LED headlights with cornering lights, hidden door handles, keyless entry, and rain-sensing wipers.

Inside, you'll find leather-accented seats, a colour head-up display, a 10.3-inch multimedia screen with Apple CarPlay and Android Auto, another 8.0-inch screen in the driver's binnacle, a heated steering wheel, heated and cooled front seats, DAB+, satellite navigation system with live traffic, and a killer 13-speaker, 918-watt Mark Levinson stereo.

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.

The LC 500h is powered by a hybrid setup that combines a 3.5-litre V6 engine with a 650-volt "Lexus Hybrid Drive" system and a lithium-ion battery. That setup delivers 264kW of power, and somewhere north of 350Nm in torque when the engine and motor outputs combine.

That power is sent to the rear wheels via a CVT automatic, and will produce a sprint to 100km/h of around 5.0 seconds. 

According to Lexus, 10 clear improvements were made the way the 2020 LC 500h drives, including a new transmission tune, more structural bracing added for rigidity, new suspension components and spring rates, and altered stabiliser bars. 

Has it made a difference? Read on. 

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.

Lexus says the LC 500h will sip 6.8 litres per hundred kilometres on the combined cycle - very impressive for what is ostensibly a performance coupe - and emit 152g/km. 

The LC 500h is equipped with an 82-litre fuel 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.

There’s something very strange about hitting the start button in what is ostensibly a sports car, and being greeted not by the bark of an exhaust, but by the gentle whirring on the car’s electronics coming to life.

But then, the Lexus LC500h is not your average performance car.

It essentially trades the out-and-out grunt of its V8-powered sibling (which produces a monstrous 351kW and 540Nm) for a kind of best-of-both-worlds approach that pairs the punch of the V6 engine with the fuel efficiency of a hybrid powertrain. 

If that sounds like an compromised approach to pure performance, you're right. But reframe the way you look at the LC 500h and it all starts to make a bit more sense.

Remember, this isn't a track-attack weapon, but a potent on-road bruiser, and the flow of power on offer always feels ample, and you never want for too much more off-the-line pace on public roads. 

Among the biggest selling points of the LC 500h is the sheer distance between its various personalities. Engage Eco, or even Normal, drive modes, and it’s a quiet, mostly very comfortable (though it can be unsettled by bigger bumps) kilometre-eater, but engage Sport or Sport Plus and it rightly transforms into something significantly angrier.

It might not be the absolute sharpest tool in the performance car shed, but the LC 500h does bristle nicely when those modes are engaged, the hybrid factor seemingly replaced by a satisfyingly meaty exhaust note and an accelerator that’s suddenly far more sensitive to the touch.

The steering feel is nice and the inputs direct, but there is something about the car’s 1980kg weight that doesn’t inspire the deepest of confidence, at least not on the rain-slicked roads we were travelling along .

A pure performance coupe? Perhaps not. But a sporty, stylish and, when you want it to be, comfortable cruiser with the ability to turn the volume up when you come across a twisting road? Bingo.

The Lexus LC 500h is yet to be ANCAP tested (the price would likely prove a sticking point), but the Japanese brand has fine form in attracting top marks, and there's certainly no shortage of safety features on offer here. 

There's a total eight airbags and a reversing camera and parking sensors, as well as a host of high-tech kit like AEB, Lane Keep Assist, Blind Spot Monitoring, active cruiser control and a bonnet that will sense pedestrian and pop up before impact in an attempt to minimise injury. 

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.

So, to ownership. Let's start with the basics first, before we move onto the new Encore Platinum benefits. 

The LC 500h is covered by a four-year/100,000km warranty, and servicing (capped for three years at $595 a pop) is required every 15,000km.

You will know already the Lexus's stellar Encore ownership program includes handy features like valet (pick-up and drop-off) servicing, but the new Encore Platinum level for owners of its more exclusive models unlocks some seriously cool stuff. 

One is a new On Demand service, which allows owners to book a different style of car when heading off on a holiday or business trip. So, say you own the LC 500h, but want to take the family to the snow and need a seven-seat 4WD like the RX L, then Lexus will lend you one at no charge, which you can keep for eight days.

The loans are available in your state or somewhere else in Australia if you're travelling, with your car waiting for you at Qantas Valet for you when you arrive. 

The One Demand service is available on four occasions over your first three years of ownership (which is also the length of the Encore Platinum membership). 

The Platinum level also provides eight examples of free valet parking at select shopping centres, as well as hotel and restaurant benefits, and invitations to Lexus' drive days around the country.