New Mercedes-AMG GT 63 S and 73e hybrid spotted: price, specs and release date

Nick Lette van Oostvoorne, James Allen and Ryan Hirons
April 23, 2021

The new Mercedes-AMG GT 63 4-door has been spotted testing while the even faster, hybrid 73e version has been teased. Read on for full details on this V8-powered four-door supercar.

  • Facelifted AMG GT-4 door range spotted
  • Plug-in hybrid 73e versions set for 816hp
  • Four-wheel drive
  • 0-60mph in less than 3 seconds
  • Reveal expected in May 2021
  • Likely on sale around August 2021
  • Expected to cost from £140,000

The Mercedes AMG GT 63 4-door is due a mid-life refresh to help it keep pace with the likes of the Audi RS7, the new BMW M8 Gran Coupe and the recently revised Porsche Panamera. The big news is that it’ll soon be available as a GT 73e hybrid with more than 800hp.

New Mercedes-AMG GT 73e hybrid performance

Mercedes has confirmed the new AMG GT 4-door will be available as a 73e hybrid for the first time. This model will keep the old car’s twin-turbo 4.0-litre V8, but also comes with a rear-mounted electric motor that can endow this already punchy car with even more performance.

How much power exactly the new GT 73e 4-door will have isn’t entirely clear, as Mercedes has yet to confirm an official power output. However, the car maker’s gone on the record to say this V8 plug-in hybrid setup is able to pump out up to 816hp, of which 204hp can come from the electric motor alone.

Little about this prototype gives away its hybrid engine, though earlier shots show one crucial difference…

Like the regular AMG GT 4-door, all of this oomph will be sent to all four wheels through a nine-speed automatic gearbox. The electric motor also has its own separate two-speed automatic gearbox, which is made up of a shorter first gear intended for stuff like standing starts, and a longer second gear that’s more suited to traveling at higher speeds on the motorway.

There’s a flap at the rear hiding the charging port

There’s no official word yet on the 73e hybrid’s electric-only driving range. However, as the battery pack is pretty small by plug-in hybrid standards at 6.1kWh, you likely won’t be able to cover much ground between charges (especially if you try and drive the car at motorway speeds using electric power alone).

An electric range of about 30 miles is to be expected at most

Use the energy stored in the battery for flat-out performance, though, and Mercedes suggests you’ll be able to accelerate from 0-62mph in under three seconds.

This new engine setup could work its way into the S Class eventually

This new high-performance hybrid system will also be fitted to the Mercedes S-Class to create a new AMG S73e – although you’ll have to wait until at least 2022 to get your hands on one of those…

New Mercedes AMG GT 63 4-door design

New air intakes are likely to feature on the updated AMG GT 63 4-door’s front bumper.

In terms of exterior design, this new AMG GT 63 4-door prototype looks practically identical to the current car. At the front, it has the same slotted grille but the lower half of the front bumper has been disguised in a camo-wrap, so it’s possible its large air intakes have seen some tweaks.

Nothing has changed on the rear of this prototype.

The new model has retained the current car’s bulging bonnet, wide front and rear wheel arches and dramatic arching roofline. The rear end looks to be fairly untouched too, with its broad LED rear lights and large quad-exhaust tips still in place.

The 73e will remain visually near-identical to the 63

We’ve also caught development versions of the plug-in hybrid 73e out on the road, and the spy shots all-but-confirm it’ll be visually identical to the GT 63 4-door. For the most part, design differences are limited to subtle details, such as the ‘E Performance’ badges underneath the vents in the front wheel arches and the charging port panel on the rear bumper.

New Mercedes AMG GT 63 4-door engine

The AMG GT 63 4-door will come with the same 4.0-litre twin-turbo V8 as the current car. 

The current Mercedes-AMG GT 63 4-door’s heart is a monstrous 4.0-litre twin-turbocharged V8 engine. That’ll be carried over into the new car, along with the nine-speed automatic gearbox and Mercedes’ 4MATIC four-wheel-drive system.

Watch our drag race to see how the AMG GT 4-door compares with an Audi RS7

The engine is currently offered in two different packages – the GT 63 with 585hp, and the range-topping GT 63 S with 638hp. The new car will likely retain both options.

Mercedes AMG GT 63 4-door interior

The new car’s cabin should look very similar to the current model’s, shown here. 

The new AMG GT 63 4-door’s interior hasn’t been spotted yet, but don’t expect any radical changes. It’ll almost certainly retain the old car’s design but should feature a few software updates for the dual-screen infotainment system.

For the most part, practicality should remain about the same, too. However, because the plug-in hybrid 73e model’s battery pack will be located above the car’s rear axle, the packaging constraints means it likely won’t have the standard GT 63 4-door’s 461-litre boot capacity.

Mercedes AMG GT 63 4-door price and release date

An official launch date for the refreshed Mercedes AMG GT 4-door hasn’t been announced yet. However, a leaked image uploaded by an anonymous user to the photo-hosting website ‘imgbb’ suggests the revised super saloon will be revealed in May 2021, and go on sale a few months later in August.

Because the image only refers to the car as a general facelift, it’s also possible Mercedes could unveil the updated GT 4-door and the new range-topping 73e plug-in hybrid model in tandem with one another.

Expect pricing to be north of £150,000 for the 73e

Prices for the AMG GT 63 S models aren’t likely to change that much over the current car – expect this model to start somewhere in the region of £140,000. The 73e hybrid version will likely cost considerably more, though, to suit its place at the top of the GT 4-door pecking order.

Can’t wait for the new car to go on sale? Watch our in-depth Mercedes-AMG GT 63 4-door review for everything you need to know about the current car or compare the latest Mercedes-AMG GT 63 4-door deals.

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