mercedes-benz m139

The M139 is a turbocharged straight-four engine produced by Mercedes-Benz. It serves as the successor to the M133 engine. It is the first AMG four-cylinder engine to feature two distinct output levels, be assembled by hand under the "one man, one engine" philosophy, and utilize a combined port and direct fuel injection system. At 310 kW , upon its introduction, the M139 was the world's most powerful four-cylinder engine in serial production, achieving a specific output of 155 kW per litre or 78 kW per cylinder. The current top version of the M139 produces 350 kW , giving it a specific output of 175 kW per litre or 87. 5 kW per cylinder, maintaining its status as the most powerful four-cylinder engine in serial production....