A few months ago we brought you a story that outlined the power outputs of the upcoming Mercedes-AMG A45 engine. You can read our original story from late 2018 at this link. Today Mercedes-AMG confirmed the info we brought you six months prior.
A press release issued earlier today confirms that the Mercedes-AMG A45 engine will be available in two power versions. The higher output derivative of the M139 engine delivers a whopping 310 kW and 500 N.m from a 2,0-litre turbocharged inline four. These outputs make it the most power four-cylinder engine in series production. Non-S or ‘basic’ versions of the A45 will dish up a slight tamer 285 kW and 480 N.m of peak torque. Even though the M139 motor is turbocharged and has a nice flat torque delivery and the engine revs to 7 200 r/min.
Mercedes-AMG has devised several revisions for the M139 unit, including turning it through 180 degrees to reposition the turbocharger and exhaust manifold closer to the firewall with the intake moved to the front of the car. A new twinscroll turbocharger uses roller bearings to reduce mechanical friction. Maximum boost pressure is 2,1 bars (1,9 in the basic version) to achieve peak power.
In all A45 models power will be delivered to four wheels via an automated transmission as the default setting. New for this generation A45 will be a dedicated drift mode that will allow drivers to direct power to the rear axle for tail-out antics. You can see it in action in the video below and in our earlier post.
One man one engine
Every Mercedes-AMG A45 engine is created using the company’s “One Man, One Engine” principle. Every engine carrys a signed plaque of the technician responsible for its creation. Incidentally, during a prior visit to the engine plant in Affalterbach we noted several female engine technicians, though they aren’t against the wording used.
In his own words
“We already set the benchmark in the segment with the preceding engine. This fundamentally new four-cylinder presented us with the challenge of doing even better. And we succeeded with a number of sometimes revolutionary solutions. With the M 139, we have once again impressively demonstrated the engine expertise of Mercedes-AMG. Not only is the output per litre unrivalled for a turbocharged engine, the high level of efficiency also demonstrates that the internal combustion engine still has further potential,” says Tobias Moers, chairman of Mercedes-AMG GmbH.