Technical Data: Notes
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TECHNICAL DATA
| Technical Data Comparison | N73B60 | M73B54 |
|---|---|---|
| V-angle configuration | 12 cyl. V / 60° | 12 cyl. V / 60° |
| Displacement (cm 3) | 5972 | 5379 |
| Bore / Stroke (mm) | 89 / 80 | 79 / 85 |
| Cylinder spacing (mm) | 98 | 91 |
| Crankshaft main bearing diam. (mm) | 70 | 75 |
| Conrod big end diam. (mm) | 54 | 48 |
| Power output (kW/HP) at engine speed (RPM) |
320 / 438 6000 |
240 / 326 5000 |
| Torque (N.m) at engine speed (RPM) |
600 3950 |
490 3900 |
| Idle speed (RPM) Maximum engine speed (RPM) |
550 6500 |
600 6500 |
| Compression ratio | 11.3 : 1 | 10 : 1 |
| Valves per cylinder | 4 | 2 |
| Intake valve diam. (mm) | 35 | 42 |
| Exhaust valve diam. (mm) | 29 | 36 |
| Intake valve lift (mm) | 0.3 - 9.85 | 10.3 |
| Exhaust valve lift (mm) | 9.7 | 10.3 |
| Engine weight (kg) | 280 | - |
| Fuel requirement | Premium unleaded | Premium unleaded |
| Knock control | Yes | Yes |
| Injection pressure (bar) | 50 - 120 | 3.5 |
| Digital Motor Electronics (ECM) | 2x MED 9.2.1 & Valvetronic ECU with 2x HDEV ECU |
2x ME 5.2 & EML IIIs |
| Emission compliance level | LEV | LEV |
| Firing order | 1-7-5-11-3-9-6-12-2-8-4-10 | 1-7-5-11-3-9-6-12-2-8-4-10 |
| Fuel consumption savings compared with M73 | 12 % | - |
| Maximum regulated vehicle speed (km/h / mph) | 250 / 155 | 250 / 155 |