AR64103 engine — Alfa Romeo 2.0 (2L)
2L · 144 hp
Engine overview
Vehicles with this engine
Factory specifications
Values from the manufacturer documentation for this engine.
Engine (general)
| Engine code | AR 64103 |
| Capacity | 1962 cc |
| Idle speed | 750 - 850 rpm |
| Inlet | 0.38 - 0.45 mm |
| Exhaust | 0.43 - 0.50 mm |
| Oil pressure | 3.5 - 5.0/5000 bar/rpm |
Engine (petrol)
| Fuel system (make and type) | Bosch Motronic M 1.7 |
| Number of cylinders | 4 |
| Firing order | 1-3-4-2 |
| Timing stroboscopic (before TDC) | 9 - 11/750 - 850 °/rpm |
| Spark plugs (make and type) | Lodge 25 HLD |
| Injection pressure/system pressure | 2.8 - 3.2 bar |
| CO exhaust gas | < 0.2 % |
| CO2 | 14.5 - 16.0 % |
| HC | < 70 ppm |
| O2 | 0.1 - 0.5 % |
| Lambda | 0.97 - 1.03 |
| Oil temperature during test | 60 °C |
| Fast-idle speed | 2500 - 2900 rpm |
| CO at fast-idle speed | < 0.3 % |
| Closed-loop test at: | 700 - 1000 rpm |
| Lambda change (Delta Lambda) | 0.03 |
| Malfunction rate engagement (Germany only) | BKV 1 |
Cooling system
| Cap pressure | 0.9 - 1.1 bar |
| Thermostat opens at | 85 - 89 °C |
| Fan on at | 88 - 92 °C |
Electrical
| Battery | 60 Ah |
| Alternator | 70 A |
Capacities
| Engine sump, incl. filter | 5.0 l |
| Gearbox refill | 1.8 l |
| Cooling system | 7.0 l |
| Air-conditioner refrigerant | 1200 g |
| Air-conditioner compressor oil | 130 - 150 ml |
Torque settings
| Cylinder head bolts — Stage 1 | 74 - 82 Nm |
| Cylinder head bolts — Stage 3 | -360° ° |
| Cylinder head bolts — Stage 4 | 82 - 88 |
| Front hub | 356 - 400 Nm |
| Rear hub | 250 - 300 Nm |
| Wheel nuts | 95 - 105 Nm |
| Spark plugs | M14 25 - 34 Nm |
Workshop procedures for this engine
Step-by-step procedures from the workshop database.
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TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
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The story behind TorqFix →Workshop data on this page last updated 22 Aug 2026.