EDITOR’S CHOICE
FOUR CYLINDER TURBO ENGINE
MERCEDES
NEW MERCEDES-AMG FOUR-CYLINDER TURBO ENGINE
FROM ULTRA-MODERN PRODUCTION
The world's most powerful four-cylinder
engine in series production, made in
Affalterbach
Affalterbach. Four wins: with an output
of up to 310 kW (421 hp), the completely
newly developed Mercedes-AMG 2.0-litre
M 139 engine is the world's most powerful
turbocharged four-cylinder engine in series
production. With this engine, Mercedes-AMG
has even exceeded the previously most
powerful M 133 by 30 kW (41 hp). Maximum
torque has also increased from 475 to up to
500 newton metres. With an output per litre
of up to 155 kW (211 hp), the new Mercedes-
AMG high-performance turbo engine even
ranks ahead of many well-known super-
sports car engines. The new, highly efficient
powerpack is produced on an innovative
production line in Affalterbach, on the "One
Man, One Engine" principle.
The four-cylinder available in two output
versions will ensure agile performance for
the compact models of Mercedes-AMG: with
310 kW (421 hp) as the S-model and with 285
26
PECM Issue 41
kW (387 hp) in the basic version. This product
policy logic has already proved successful in
the V8-powered AMG Performance models,
and more closely meets customer wishes.
Apart from its performance figures, the
new engine impresses with its immediate
response. To this end the torque curve was
carefully balanced ("torque shaping"): The
peak torque of 500 newton metres (480
newton metres for the basic version) is
available in a range of 5000-5250 rpm (4750-
5000 rpm in the basic version).
With this configuration, the AMG engineers
have achieved a power delivery similar to
that of a naturally aspirated engine for an
even more emotive driving experience. The
engine developers were also able to realise
a dynamically increasing torque curve in the
lower engine speed range, thereby improving
agility. The increasing torque at higher
rpm makes the engine more free-revving.
Moreover, the high maximum engine speed
(up to 7200 rpm) confirms the M 139 as a
sports engine.