The AMG 4.0 litre V8 biturbo engine is used in the S 63 4MATIC+ Cabriolet and Coupé with the highest power level to date at 450 kW (612 HP). The peak torque of 900 Nm also represents a new maximum. It is available across a wide rev range between 2750 and 4500 rpm, and thereby provides a sense of superior poise. The sprint from standstill to 100 km/h takes just 3.5 seconds, and the fulminating acceleration continues until the electronically limited top speed of 250 km/h is reached (with AMG Driver's Package: 300 km/h).
The further advanced AMG 4.0-litre V-8 Biturbo engine utilises well-proven twin-turbo forced induction, with the two chargers not located outside on the cylinder banks, but rather between them in the V of the cylinders. The advantages of the "hot inner V" are a compact engine design, spontaneous response of the turbochargers and low exhaust emissions thanks to optimal airflow to the near-engine catalysts.
Two twin-scroll turbochargers provide even better fresh-mixture cylinder charge. The results are a higher output, more torque even at low engine speeds, and a very spontaneous throttle response.
'AMG Cylinder Management' cylinder deactivation system
For maximum efficiency, Mercedes-AMG has equipped the V8 engine in the S 63 4MATIC+ Coupé with the AMG Cylinder Management cylinder deactivation system. In the partial-load range, cylinders two, three, five and eight are deactivated, which significantly lowers the fuel consumption.
When the driver has selected the "Comfort" transmission driving mode, the cylinder deactivation system is available in the wide engine speed range from 1000 to 3250 rpm. The AMG main menu on the instrument cluster informs the driver whether the cylinder deactivation system is in use and whether the engine is presently operating in the partial or full-load range. The transition from four to eight-cylinder operation is immediate, fast and imperceptible, so that the passengers do not experience any loss of comfort whatsoever.
Short shift times, high efficiency: AMG SPEEDSHIFT MCT 9G transmission
For the first time the S 63 4MATIC+ Coupé and Cabriolet are equipped with the AMG SPEEDSHIFT MCT 9G transmission, which convinces with extremely short shift times, lightning reactions to shift paddle commands, a double-declutching function and fast multiple downshifts. A wet start-off clutch replaces the torque converter of the production model.
This saves weight and improves the response to the driver's accelerator pedal input, particularly during acceleration and load changes. It also makes the RACE START function possible.
The extremely high torque of the S 65 Coupés and Cabriolets is transferred by the tried and trusted AMG SPEEDSHIFT TCT 7G transmission. It delivers convincing tailor-made dynamics and high variability. Whether automatic or initiated by the driver using the steering wheel paddle shifters, upshifts or downshifts are affected quickly and instantly. Especially in the "Sport+" and in manual driving modes, the transmission is very fast and responsive.