New peak of performance: 4.0-litre V8 biturbo engine with twin-scroll turbochargers
The versatile AMG 4.0-litre twin-turbo V8 engine in the E 63 S 4MATIC+ takes peak performance to a new level at 450 kW (612 hp). Maximum torque attains a new best value of 850 Nm. It is available over a broad engine speed range of 2500 to 4500 rpm and so provides a feeling of effortless superiority in every accelerator pedal position. A sprint from zero to 100 km/h is absolved in 3.4 seconds, and this dynamic acceleration only ends at the governed top speed of 250 km/h (with AMG Driver's package: 300 km/h). The E 63 4MATIC+ is rated at 420 kW (571 hp) and has 750 Nm of torque. This variant accelerates to 100 km/h in 3.5 seconds.
The advanced AMG 4.0-litre V8 biturbo engine utilises well-proven twin turbocharging, 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, an immediate response from the twin-scroll turbochargers and low exhaust gas emissions thanks to optimum air flow for the close-coupled catalytic converters.
Two twin-scroll turbochargers are deployed for the first time to boost performance and improve responsiveness further. The housing is divided into two parallel flow passages. Combined with two separate exhaust ducts in the exhaust manifold, this makes it possible to control the exhaust gases on the turbine wheel separately. The exhaust gas from the first and fourth cylinders of the cylinder bank is fed into one duct and exhaust gas from the second and third cylinders to the other duct. The aim is to prevent the individual cylinders from having mutually adverse effects on the gas cycle. This reduces the exhaust gas back pressure and improves gas exchange.
The results are increased output due to improved cylinder charge with fresh mixture, more torque at low revs and very immediate response times.
Other engine measures include new pistons, an optimised air intake and charge air cooling, as well as extensive software developments. Spray-guided direct petrol injection with piezo injectors, the all-aluminium crankcase, the four-valve-per-cylinder design with camshaft adjustment, air-water charge air cooling, alternator management, the ECO start/stop function and the gliding mode have all been retained. To sum up, the eight-cylinder engine thrills with its exceptional power delivery and powerful acceleration in all engine speed ranges combined with maximum efficiency for low consumption and emission values.
AMG Cylinder Management
For maximum efficiency, Mercedes-AMG has equipped the V8 engine with the AMG Cylinder Management cylinder deactivation system. This already helped the SLK 55 to achieve impressively low consumption and emission values and is now being used with a turbocharged engine from the high-performance sports car brand for the first time. In the partial-load range cylinders two, three, five and eight are deactivated, which crucially lowers the fuel consumption.
With combined fuel consumption of 8.9 litres and CO2 emissions of 203 grams per kilometre (combined), the E 63 4MATIC+ and E 63 S 4MATIC+ set a new best by comparison with their competitors.
When the driver has selected the "Comfort" transmission drive program, 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.