The engine, while still transverse, is rotated 180 degrees to put the turbo in the back up against the firewall and the intake system is positioned up front to make for a lower design with fewer air restrictions. The turbo itself is a twin-scroll unit and has roller bearings to reduce friction and quicken turbo response. The engines are hand built by a single craftsman in Affalterbach Germany.
No word yet on which vehicles these engines will go in, but its a safe bet to look for them to show up in the Mercedes A-Class, CLA-Class, and probably the GLB-Class.
Technical data at a glance
Mercedes-AMG
M 139 2.0 liter turbocharged four-cylinder engine
Displacement
1991 cc
Bore x stroke
83.0 x 92.0 mm
Output
416 hp at 6750 rpm (S-model)
382 hp at 6500 rpm (base version)
Peak torque
369 lb-ft at 5000-5250 rpm (S-model) 354 lb-ft at 4750-5000 rpm (base version)
Max. engine speed
7200 rpm
Compression ratio
9.0:1
Turbocharging
One twinscroll turbocharger with roller-bearing compressor and turbine wheels
Max. charge pressure
2.1 bar (S-model)
1.9 bar (base version)
Mixture formation
Combined direct and manifold injection.
1.) Third-generation multiple direct injection. Fast and precise piezo injectors spray the fuel into the combustion chambers at high pressure
2.) Additional intake manifold injection with solenoid valves
Cylinder head
Two overhead camshafts, 16 valves, adjustable intake and exhaust camshafts, CAMTRONIC valve timing
adjustment for the exhaust camshaft
Max. air mass throughput
2,645 lb/h (S-model) 2,425 lb/h (base version)
Engine weight (wet)
353.8 lbs
... 416 horsepower in S trim...
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