Systematic implementation of the AMG Lightweight Performance strategy reduces the weight of the S63 AMG by up to 100 kilograms compared to the predecessor model. This weight saving was achieved largely thanks to the use of AMG forged light-alloy wheels, a lightweight lithium-ion battery and a weight-optimised AMG high-performance composite brake system. Furthermore, the entire outer skin of the S-Class, including the roof and the front end of the body, is made of aluminium. Installing a spare wheel recess made of carbon fibre, a material used in Formula 1, reduces the weight by a further four kilograms. The S63 AMG also leads the way when it comes to power-to-weight ratio, boasting a figure of 3.49 kg/hp, resulting in effortlessly superior performance. Acceleration from 0 to 100 km/h takes 4.0 to 4.4 seconds, depending on model variant, and the top speed is 250 km/h (electronically limited).
In terms of maximum output and fuel consumption, the AMG 5.5-litre V8 biturbo engine remains the most efficient series-produced V8 engine of all. With an output of 430 kW (585 hp) and a torque of 900 Nm, the AMG eight-cylinder unit from the BlueDIRECT engine family (in-house designation M 157) outperforms all comparable engines. The fuel consumption of the new Mercedes-Benz S63 AMG is 0.4 litres per 100 kilometres lower than that of the predecessor model, even though the engine output has been increased by up to 30 kW (41 hp). The range-topping eight-cylinder model already meets the requirements of the EU6 emissions standard, which is due to come into force in 2015.
Technical highlights of the AMG 5.5-litre V8 biturbo engine:
- Direct petrol injection with piezo injectors
- Biturbocharging
- All-aluminium crankcase
- Four valves per cylinder with camshaft adjustment
- Air-to-water intercooler
- Efficient cooling of engine oil, engine water and transmission oil
- Lightweight composite oil pan
- Alternator management
- ECO start/stop function
The AMG sports exhaust system in the S63 AMG has automatic logic-controlled exhaust flaps in both rear silencers. When the transmission is in "C" (Controlled Efficiency) mode, the flaps remain closed in most situations, in which case the eight-cylinder biturbo engine's sound is more understated - perfect for long trips and a comfortable ride in the rear. In "S" (Sport) and "M" (Manual) modes, the exhaust flaps open earlier and more spontaneously, especially if the driver prefers a dynamic driving style. The result is an even fuller, emotional, hallmark AMG engine sound.
