Making its debut at the 2018 Geneva Motor Show is the new Mercedes-AMG GT 4-Door Coupe, a four-door version of the two-door AMG GT in spirit – it is based on the MRA platform. In essence, the model “blends the dynamic capabilities of its halo sports car with some practicality for everyday use,” and was first previewed by the manic GT Concept.

Being parked under the Mercedes-AMG banner, the AMG GT 4-Door Coupe’s engine line-up starts with the same 3.0 litre turbocharged inline-six petrol engine that is used in the CLS 53.

In the Mercedes-AMG GT 53 4Matic+, the powerplant serves up 429 hp (435 PS) at 6,100 rpm and 520 Nm of torque at 1,800 to 5,800 rpm. Like on the CLS 53, there is an EQ Boost starter-alternator sandwiched between the engine and nine-speed AMG Speedshift TCT 9G automatic transmission.

The EQ Boost unit provides up to 21 hp (22 PS) and 250 Nm of additional output, and is part of the car’s 48 V on-board electrical system. Said system is also linked to the electric auxiliary compressor, which helps the exhaust gas turbocharger at low revs. The result is a 0-100 km/h time of just 4.5 seconds, and a top speed of 285 km/h.

If a straight-six isn’t your cup of tea, the four-door GT is also available with a 4.0 litre V8 with two twin-scroll turbochargers. The mill is paired with a nine-speed AMG Speedshift MCT 9G automatic transmission instead, and features a cylinder deactivation system to reduce fuel consumption.

The V8 is tuned to two outputs, and in the Mercedes-AMG GT 63 S 4Matic+, it makes 630 hp (639 PS) at 5,500 to 6,500 rpm and 900 Nm of torque at 2,500 to 4,500 rpm. That is more than the two-door GT R has on tap, and translates to a 0-100 km/h time of 3.2 seconds and 315 km/h top speed.

For those who can do with a little less, there’s the Mercedes-AMG GT 63 4Matic+ that gets 577 hp (585 PS) at 5,500 to 6,500 rpm and 800 Nm of torque at 2,350 to 5,000 rpm. The lower output equates to a slower century sprint time of 3.4 seconds as well as a lower top speed of 310 km/h.

Regardless of which engine you choose, all models come with the AMG Performance 4Matic+ all-wheel drive system. Like on the latest E 63, drivers can set the car up in Drift Mode, whereby the car becomes purely rear-wheel drive. In its default setting, the rear-bias system variably splits torque between both axles.

A rear-axle limited-slip differential comes as standard on the AMG GT 63 S, and is part of the Dynamic Plus Package, which is available as an option on other models. Models with the V8 also get active rear-wheel steering as standard (optional for the six-cylinder model), where at speeds of up to 100 km/h, the the rear wheels point in the opposite direction to the front wheels for better agility.

Also exclusive to the V8 models are the AMG high-performance braking systems, with large compound discs, six-piston calipers at the front and single-piston calipers at the back. The S model gets yellow-painted calipers, whereas it’s red ones for the base V8 model. The six-cylinder model on the other hand, gets slightly smaller discs and silver grey calipers instead. Pay a bit more for the ceramic brake system, and you’ll get new discs along with bronze-coloured calipers.

Other drive-related bits include the AMG speed-sensitive sports steering, with variable power assistance depending on the selected mode – Comfort, Sport and Sport+. These are selectable in conjunction with the AMG Dynamic Select transmission mode, but an Individual mode allows for some personalisation.

Depending on the engine, there are also six drive programmes to fiddle with – Slippery, Comfort, Sport, Sport+, Race and Individual – parked under the AMG Dynamics umbrella. Additionally agility functions – Basic, Advanced, Pro and Master, with a spectrum range that starts from extremely safety-oriented to highly dynamic.

Design-wise, the AMG GT 4-Door Coupe attempts to retain as many cues as its two-door sibling, including the Panamerica grille, front Jet Wing (flowing A-Wing on the six-cylinder model), Airpanel, curvaceous body and slim taillights.

However, the four-door GT sports a higher and shorter bonnet compared to the two-door GT in order to allow for the larger cabin. It also comes fitted with sharper headlights that are reminiscent of those on the CLS.

On V8-powered cars, the side front air intakes have three horizontal louvres, a more pronounced diffuser and trapezoidal tailpipe trims. The six-cylinder version is less expressive with a single louvre in each of the air inlet grilles, a more reserved diffuser and round tailpipe trims.

Customers who want to spruce their cars up can opt for a number of exterior packages – Night, Chrome, Aerodynamic and two Carbon-Fibre options. You’ll also get wheels ranging from 19 to 21 inches in size, all made out of lightweight alloy and using forging technology.

As for the interior, it is a mishmash of AMG GT and CLS, with the lower section appearing like the former, while the main dashboard resembles the latter. We’ll start with the most attention-grabbing of the two, where you’ll find a pair two HD displays measuring 12.3 inches each as part of the Widescreen Cockpit.

Drivers get to select from three different themes – Classic, Sport and the completely new Supersport – with the last being packed full of AMG-specific information. There’s also a new AMG performance steering wheel with Touch Control buttons on them.

Moving on to what’s below the main dash, you’ll find the company’s new touchpad controller for the COMAND infotainment system, along with rectangular switchgear instead of the circular ones in a two-door GT.

Lest we forget, there is a lot more practicality attached to the new AMG member, which now offers seating for up to four, or five, depending on the chosen seat layout – there are three to choose from.

Available to rear passengers is a touchpad screen integrated into the console between the seats (only for High-Class variants), which allows them to call up dynamism data via the AMG menu as well asl controlling the ambient lighting or the climate control and seat heating.

The carmaker also claims up to 395 litres of boot space is available, expandable to 1,324 litres with the rear seats folded. The wide load compartment also makes it easier to load and unload items from the boot, and a hands-free feature makes opening the boot as simple as moving your foot beneath the rear bumper.

Miscellaneous items include the AMG Track Pace for folks who feel like they have the spirit of Lewis Hamilton within them, and want access to as much track telemetry as possible, and an in-car room fragrance. The latter works with the Energizing comfort control that is already present in most Mercedes-Benz cars.

After celebrating its Geneva debut, the AMG GT 4-Door Coupe is set to go on sale in the summer of 2018. Its biggest rival will be the Porsche Panamera, so which of the two do you prefer?