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A petrol engine making more torque than diesel equivalent?? The dream have come true... Mercedes-AMG Details Most Powerful 4-Cyl Ever, Makes 416 HP 500 Nm Look for this engine in the A45, CLA 45, and GLB 45 in the near future. Mercedes-AMG finally announces the official specs for its new 2.0-liter turbocharged four-cylinder engine that goes under the internal designation M 139. In the higher-spec S trim, the mill offers 416 horsepower (310 kilowatts) and beats the previous-gen A45 with 375 hp (280 kW) to take the title as world's most powerful factory-offered four-cylinder engine ever available in a production vehicle. If we want to split some very thin hairs, the Mitsubishi Lancer Evolution FX-440 MR made 440 hp from its 2.0-liter four-cylinder, but production amounted to just 40 units exclusively for the UK. Specifically, the S version of the M 139 makes 416 hp at 6,750 rpm and 500 Newton-meters of torque between 5,000 and 5,250 rpm. The redline hits at 7,200 rpm. There's also a standard variant of the M 139 that produces 382 hp at 6,500 rpm and 480 Newton-meters between 4,750 and 5,000 rpm. The redline is the same 7,200 rpm. Both versions of the M 139 use a twin-scroll turbocharger. The S variant can produce up to 30.5 psi (2.1 bar) of boost, but the standard model goes to 27.6 psi (1.9 bar). To get into the nitty-gritty details, The M 139 weighs 160.5 kilograms. The four cylinders each have a bore of 83 millimeters and stroke of 92 millimeters. The mill features both direct injection and indirect injection through the intake manifold. There are two overhead camshafts operating on 16 valves, and the drive train is capable of tweaking the valve operation on both sides, in addition to Camtronic valve opening adjustment for the exhaust side. The M 139 engine will be available in a variety of models in the near future. The first of them to debut should be the new A45.