| Mercedes-Benz M139 | |
|---|---|
 | |
| Overview | |
| Manufacturer | Mercedes-AMG |
| Production | 2019-present |
| Layout | |
| Configuration | Inline-four engine |
| Displacement | 2.0 L (1,991 cc) |
| Cylinder bore | 83 mm (3.27 in) |
| Piston stroke | 92 mm (3.62 in) |
| Cylinder block material | Aluminium alloy |
| Cylinder head material | Aluminium alloy |
| Valvetrain | DOHC |
| Compression ratio | 9.0:1 |
| Combustion | |
| Turbocharger | One twin-scroll, electrically assisted |
| Fuel system | Combined Direct and Port Fuel Injection |
| Fuel type | Gasoline |
| Output | |
| Power output | 285 kW (387 PS; 382 hp) base version 310 kW (421 PS; 416 hp) S-model |
| Torque output | 480 N⋅m (354 lb⋅ft) (base version) 500 N⋅m (369 lb⋅ft) (S-model) |
| Dimensions | |
| Dry weight | 160.5 kg (354 lb) |
| Chronology | |
| Predecessor | Mercedes-Benz M133 engine |
The M139 is a turbocharged inline-four engine produced by Mercedes-Benz. It is the successor of the M133 engine. It is also the first four-cylinder engine by AMG to be specified with two outputs, to be assembled by hand using "one man, one engine" philosophy, and to be equipped with combined port and direct fuel injection system. At 310 kW (416 hp) on its introduction, M139 was the world's most powerful four-cylinder engine in serial production with specific output of 208 hp per litre or 104 hp per cylinder.[1][2] The current top trim of the M139 produces 350 kW (469 hp), giving it a specific output of 235 hp (175 kW) per litre or 117 hp (87.5 kW) per cylinder, making it the current most powerful four-cylinder engine in serial production.
- ^ Patrick George (7 June 2019). "Good Gravy: AMG Is Getting 416 Horsepower Out of Just a 2.0-Liter Turbo Four". Jalopnik.
- ^ Bob Sorokanich (7 June 2019). "How Mercedes-AMG Made the Most Powerful Production Four-Cylinder Ever". Road & Track.