Mercedes-AMG's heavily boosted 2.0-liter has been pushing the limits ever since its birth. Then, the company hybridized it and blew everything away.

AMG's engineers didn't stop there. They gave the M139 a highly efficient (and expensive) dual ball-bearing, twin-scroll turbo.

The AMG e-turbo can handle the heat from the exhaust, as it shares a coolant circuit with the 2.0-liter M139 I-4. Consider the electric motor and its associated electronics cooled.

New G20E engine was originally claimed to make 395 hp but Toyota now says the engine can be pushed much harder ...

Mercedes-AMG will launch its new 2.0-liter turbo four in a handful of AMG 45-badged models in the very near future and has suggested that it could get more powerful. The M139, as it is code-named ...

The M139 turbo-4 engine comes from the AMG A 45 and CLA 45, where it sits transversely up front. In the C 63 S E Performance, it sits longitudinally and is hooked to AMG's 9-speed automatic ...

The Mercedes-AMG M139 turbocharged inline-four makes 416 horsepower and 369 pound-feet of torque out of just 2.0 liters of displacement.

Remember the 176-series A-Class with its AMG-specific M133 inline-four turbo monster of an engine? Also used by the CLA 45 and GLA 45, said lump was replaced by the AMG division with the M139.

While it’s true that 4Matic+ is on the table to fend off the BMW M3 with M xDrive, the 2.0-liter M139 turbo in the A 45 S 4Matic+ doesn’t match the character of the 63 series.

While we recently talked about how the upcoming AMG C63e will come with a hybrid powertrain that will utilize a modified version of the 2.0-liter M139 turbo-four from the A45S, as well as the ...

German tuning firm Posaidon has unleashed it's versions of the Mercedes-AMG A45 S. As expected, it’s based on the current A45 S with the M139… ...

The new AMG factory floor that builds the M139 is truly a next-generation engine plant. We toured an “old” one, which you can see in the gallery above.