2017 Mercedes A45 AMG 4MATIC In Jupiter Red Drive
4The extremely agile, turbocharged four-cylinder engine combines its exhilarating power with exemplary efficiency. The car sprints from 0 to 100 km/h in just 4.2 seconds. At the same time fuel consumption remains low and is exemplary: no other high-performance model in this category can match its fuel consumption (combined) of 7.3-6.9 litres per 100 kilometres (corresponds to 171 -162 g/km CO2).
The output of 140 kW (191 hp) per litre likewise marks a record for a series production four-cylinder engine, and raises the AMG high-performance power unit to the level of thoroughbred super sports cars. Key components include the spray-guided direct petrol injection. Piezo injectors centrally located in the four combustion chambers inject the fuel at a pressure of up to 200 bar. The combination of multiple fuel injection and multi-spark ignition improves fuel economy and significantly increases thermodynamic efficiency, leading to low exhaust emissions. The twin-scroll turbocharger and maximum dethrottling of the exhaust system improve the charge pressure build-up, and therefore the engine's response to the accelerator. The maximum charge pressure is 1.8 bar.
Other highlights include: a gravity sand-cast all-aluminium crankcase, weight-optimised crank assembly with forged steel crankshaft and forged pistons with friction-optimised piston rings, NANOSLIDE® cylinder wall technology, alternator management and the ECO start/stop function. Sophisticated cooling of the engine oil, coolant, charge air and transmission fluid not only improves durability, but also suitability for the race track.
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