Mercedes-AMG reveals new 800hp+ plug-in hybrid powertrain

    The GT73e 4Matic 4-door will be the flagship plug-in hybrid from AMG.

    Published On Apr 02, 2021 08:00:00 AM


    Mercedes-Benz’s AMG performance car division has unveiled two new in-house developed petrol-electric plug-in hybrid (PHEV) drivetrains. Of the two, the more powerful version is set to provide future four-wheel drive AMG models with over 815hp, along with pure electric capability for zero-emission running over short distances.

    • Electrified 2.0-litre four-cylinder and 4.0-litre V8 petrol engines revealed
    • 4.0 V8 plug-in hybrid to make in excess of 815hp and 1,000Nm of torque
    • E Performance PHEV models to serve as precursors to all-electric AMGs

    The new PHEV powetrains, part of what AMG calls its e-Performance strategy, are based on the German carmaker’s existing twin-turbocharged 4.0-litre V8 and a newly developed longitudinally-mounted version of its turbocharged 2.0-litre four-cylinder petrol engine – the M177 and M139 as they are respectively codenamed. Both engines are mated to a 9-speed AMG torque converter-equipped MCT-Speedshift gearbox.

    In an electrification process aimed at increasing their reserves while providing added efficiency for lower average CO2 emissions, the AMG combustion engines are combined with an electric motor integrated into the rear axle assembly.

    The asynchronous unit provides a continuous 95hp but has been developed to provide peak power of up to 204hp along with 300Nm of torque at a maximum 13,500rpm in more performance orientated driving modes. It provides drive primarily to the rear wheels and, if necessary, to the front wheels for short periods via a carden shaft.

    The new driveline architecture, originally hinted to on the Mercedes-AMG GT concept car revealed at the Geneva motor show in 2017, departs from the arrangement used by standard Mercedes-Benz PHEV models, which employ an electric motor integrated in the front of the gearbox housing. This helps contribute to a more favourable front-to-rear weight distribution that AMG says is crucial to its future e-Performance models retaining the handling properties of its existing combustion engine line-up, despite an average 200kg increase in kerb weight model-for-model.

    It also allows a higher combined torque rating as the electric motor operates independently to the 9-speed gearbox used by the combustion engine with its own 2-speed unit.

    Electrical energy used to power the electric motor is stowed in a 400-volt 6.1kWh lithium-ion battery that uses cylindrical cells for compact packaging. Developed in partnership with British-based High Performance Powertrains – the Mercedes-AMG owned company responsible for much of the engineering of the company’s F1 race car drivetrains – it is claimed to weigh 89kg.

    The driver can choose between five different driving modes: Electric, Comfort, Sport, Sport+, Race and Individual.

    AMG says the new petrol-electric powertrains are planned for several models in what it describes as “various expansion stages”.

    The V8 engine-based PHEV powerplant, which will first appear in the GT73e 4Matic 4-door, is claimed to develop over 815hp and more than 1,000Nm of torque – sufficient, according to preliminary data released by AMG, to provide the Porsche Panamera S E-Hybrid rivalling sedan with 0-100kph acceleration in 3.0sec.

    Further models set to receive the V8 PHEV unit include the yet to be official confirmed S73e 4Matic and SL73e 4Matic.

    The four-cylinder PHEV drivetrain will debut on the successor to the C63 4Matic as the C63e 4Matic in early 2022. Its combustion engine adopts a new electric turbocharger to develop up to 450hp. In combination with the same electric motor and battery used by its V8 PHEV sibling, it is claimed to offer over 510hp and 700Nm of torque.

    AMG is yet to reveal the electric range of its new PHEV drivetrains. But while emphasizing the focus is more on performance than zero emission distance capability, it does suggest short distances will be possible on the power of the electric motor and battery alone.

    The new AMG drivetrain recovers kinetic energy on the overrun and under braking in four stages; Level 0, 1, 2 and 3 – selectable by the driver via the right-hand-side steering wheel button. In Level 3, the generator is capable of capturing up to 90kW of electrical energy.

    The E Performance PHEV models will serve as a precursor to a range of pure-electric AMG cars based on Mercedes’ EQ models. Described as electric equivalents to today’s 43- and 53-badged models, AMG’s EVs will adopt the traditional performance-inspired styling cues, have bespoke interior elements and use a dual-motor, four-wheel-drive powertrain capable of torque vectoring and a sub-4.0sec 0-100kph time, depending on the model.

    Mercedes-AMG in India

    The performance brand has recently launched its entry-level A35 Limousine in India at Rs 56.24 lakh (ex-showroom, India). At the end of last year, Mercedes-AMG introduced its first locally assembled model - the facelifted GLC 43 Coupe - and has plans to bring more to the market, such as the the hardcore 730hp Mercedes-AMG GT Black Series.

    Also see:

    Mercedes-Benz EQS to be the world’s most aerodynamically efficient car

    Mercedes AMG A35 sedan India review, test drive

    2021 Mercedes-Benz E Class facelift video review

    Mercedes-Benz Cars

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