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Mercedes-AMG GT four-door undergoes wind tunnel testing ahead of Geneva reveal

evo staff
14 Feb 2018

More photos of the Mercedes-AMG GT four-door have surfaced prior to its imminent debut in Geneva.

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Following the official spy shots of the Mercedes-AMG GT four-door we saw last week, Mercedes has now revealed images of a camouflaged car undergoing wind tunnel testing,  ahead of its production debut at the 2018 Geneva motor show.

>Click here to read our review on the Mercedes-AMG GT R

The latest collection of images once again fail to disguise the car’s distinctive silhouette. Aesthetically, the car follows the design template set out by the concept which was revealed in Geneva last year. So the long bonnet, sleek shape and familiar rear-end remain, pointing towards the model’s AMG GT origins.

A few weeks short of its production debut at the Geneva motor show, Mercedes is wrapping up testing of the Mercedes-AMG GT four-door and honing it towards the final production specification.

Speaking ahead of the Geneva motor show Tobias Moers, Mercedes-Benz CEO said. ‘We're nearly there! We're now just giving the newest member of the AMG GT family the finishing touch in the wind tunnel. Stay tuned for the upcoming premiere in Geneva’. Mercedes previously released spy shots of the Porsche Panamera rival working through its rigorous testing schedule on road and at the Nurburgring.

> 2018 Geneva motor show

Despite sharing a similar name, the new sports saloon will not be based on the same platform as the marque’s two-door sports car, the AMG GT. Instead the four-door GT Coupe will use a heavily modified version of the MRA platform that already underpins core Mercedes-Benz saloons. As is AMG’s way though, the GT Coupe has a significantly wider track compared to its more staid saloon cousins. Even with its saloon shape and four doors, the new car will have a significant resemblance to its sports car sibling thanks to AMG GT design trademarks like an upswept window line and fastback rear end.

Like the GT sports cars, the GT Coupe will utilise AMG’s 4-litre twin-turbocharged hot-V V8 engine. But rather than making do with power from the internal combustion engine alone, the GT Coupe will supplement the V8’s performance with an electric motor raising total power up to around 800bhp, if rumours are correct. That’s significantly more than Porsche’s 670bhp Panamera Turbo S E-Hybrid.

As well as boosting the car’s performance, the GT Coupe’s hybrid powertrain will aid its efficiency too, and should allow pure electric propulsion depending on battery capacity. Rather than just retrofitting a current Mercedes-Benz battery pack, AMG will be producing a higher specification system that will be able to expel and regenerate electricity at a higher rate.

>Click here to learn more about the Mercedes-AMG 'Project One' hypercar

This hybrid system will be connected to a nine-speed automatic gearbox and 4MATIC all-wheel drive system, although it remains to be seen if it will mimic the latest E63 in offering a rear-drive only mode. The latest mule spotted also sported a set of carbon-ceramic brakes with massive gold calipers.

The result of all of this tech should be some pretty mind blowing performance figures, with AMG aiming for a 0-62mph time of under three seconds while MPG and CO2 figures should both be far friendlier than the AMG norm.

What AMG will call the new car is still up for speculation. Mercedes are currently referring to it as the ‘four-door AMG GT Coupe’ but rumours of GT 4 or GT C4 have been floating around.

>Click here for out passenger ride in the Porsche Panamera Turbo S E-Hybrid

Regardless of the name, the GT saloon’s shape and proportions do make it look incredibly similar to Mercedes’ own CLS, the latest of which was revealed last year, begging the question what is the new car for? With its combination of petrol and electric powertrain, the four-door GT Coupe shows a more realistic future of how AMG will integrate hybrid technology into its cars compared to its  upcoming 'Project One' F1 based hypercar.

Below is a conversation evo’s deputy editor Adam Towler had with AMG boss Tobias Moers at the launch of the AMG GT Concept in Geneva last year. 

Tobias Moers on the Concept GT

evo grabbed a few minutes Mercedes-AMG CEO Tobias Moers back at the Geneva motor show, who gave us a little more insight into the unique new fastback - and the company's increasing commitment to hybrid powertrains and their potential performance benefits.

When did you start work on the Concept GT?

'The idea of the car was born three years ago, the idea of the hybrid drivetrain was born two years ago, and the idea to do a concept car was born a year ago: this car is the outcome of a lot of work, and looking for the future of performance.'

Can you describe that future?

'Hybrid gives you a lot of opportunities for driving dynamics. Yes, you have to deal with the added weight – that can’t be eliminated. But beyond 2020 electrified powertrains will be the key to expansion. With 99,000 cars sold last year we’re no longer a small player in the performance segment, and I think it’s up to us to define what future performance looks like.'

How does the Concept GT illustrate that?

'You will see a totally different approach to hybrid with the GT (than from Mercedes). It’s not about long range – although we can do that - but it’s about performance that gives more power and efficiency; the freedom to have electric range 30-50km – or more depending on battery size and weight – but that provides 0-62mph in under three seconds. This is not just a showcase: we do have a car, we know how it drives, and we do see improvements on the racetrack. The secret is having a driving strategy that gives you ‘always on’ with the batteries – instant throttle response, but torque vectoring, too.

'The batteries are done by us. They are different to the ones Mercedes uses, because a performance hybrid means you push more amps back and pull more amps out in the same period of time – it’s about the cells, the chemistry and the cooling. We have a lot of experience now, coming from the SLS Electric Drive.'

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