2018 BMW M5 vs 2018 Mercedes E63S AMG – Video
Providing ample power for the new BMW M5 is a 4.4-litre V8 bi-turbo engine with M TwinPower Turbo technology. The M engineers have carried out significant revisions to the outgoing model’s power unit. For example, newly developed turbochargers, ultra-efficient indirect charge air cooling and increased fuel injection pressure together help to raise output and, above all, torque. The engine develops 441 kW/600 hp at 5,600 – 6,700 rpm, while a monumental 750 Nm (553 lb-ft) of torque is placed at the driver’s disposal from as low down as 1,800 rpm and remains there until 5,600 rpm. A map-controlled, fully variable oil pump ensures oil is supplied as and when the new BMW M5 needs it, even on the track. The car’s impressive performance figures speak for themselves: 0 to 100 km/h (62 mph) in just 3.4 seconds, 0 to 200 km/h in 11.1 seconds (124 mph). Top speed, meanwhile, is an electronically limited 250 km/h (155 mph), but the optional M Driver’s Package can keep the fun coming to 305 km/h (189 mph).
The versatile AMG 4.0L V8 biturbo engine in the E63 S takes peak performance to a new level with 603 hp and 627 lb-ft of torque, available from 2,500 to 4,500 rpm. A sprint from zero to 60 mph takes only 3.3 seconds, and this dynamic acceleration only ends at the governed top speed of 186 mph.
The advanced AMG 4.0L V8 biturbo engine utilizes 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 exhaust gas cycle. This reduces the exhaust gas back pressure and improves gas exchange. This results in increased output due to improved cylinder charge, more torque at low revs and immediate throttle response times.
Other engine measures include new pistons, an optimized air intake and charge air cooling, as well as extensive software developments. Spray-guided direct petrol injection with piezo injectors, all-aluminum crankcase, four-valve-per-cylinder design with camshaft adjustment, air-water charge air cooling, alternator management, ECO start/stop function and 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.
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