Mercedes-Benz and AMG have released extensive details about the newly developed V8 4.0-liter twin-turbo engine.

Mercedes-Benz and AMG have released extensive details about the newly developed V8 4.0-liter twin-turbo engine.

Set to make its first appearance in the long-awaited AMG GT, the V8 4.0-liter twin-turbo engine codenamed M178 meets Euro 6 emissions standard and has a dry weight of 209 kg (461 lbs). With a displacement of 3982cc, in the AMG GT-S it will generate 510 PS (375 kW) at 6,250 rpm and 650 Nm (479 lb-ft) between 1,750 and 4,750 rpm, providing 128 PS and 163.2 Nm per liter.

It benefits from an eco start/stop function to save fuel and also has a separate cooling-air flow for the exhaust gas turbochargers during high thermal load. AMG’s engineers have installed active engine mounts for improved lateral dynamics while the two-mass flywheel with centrifugal pendulum prevents torsional vibration on the drive line to smoothen the ride.

The turbochargers have a maximum charge pressure of 1.2 bar pressure and a maximum speed of 186,000 rpm. The V8 motor comes with an aluminum crankcase created using sand casting technology and also adopts a closed deck design and NANOSLIDE technology for the cylinder bore surfaces, making them twice as hard compared to regular cast-iron linings. Moreover, the engine comes with forged aluminum pistons with low-friction piston rings to further reduce oil and fuel consumption.

If we were to believe recent reports, the AMG-GT will be unveiled online on September 9, followed in early October by a public debut in Paris. Only the more powerful GT-S variant will be revealed, while the standard AMG GT is set to come out in the following months with 462 PS (340 kW). The same M178 engine will also find its way inside the C63 AMG set to be introduced early next year.

Additional details can be found in the attached press release.

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