Engine & identification
Vehicle identification
| No. of cylinders Type | 4/OHC |
|---|---|
| Capacity (Fiscal) cc | 1779 (1767) |
| Compression ratio :1 | 9,5 |
| Suitable for unleaded petrol | No |
| Minimum octane rating RON | 98 |
| Ignition system Make | Marelli |
| Ignition system Type | SZ |
| Ignition system Description | CB |
| Fuel system Make | Weber/Solex |
| Fuel system Type | 40DC/C40 15 |
| Fuel system Description | Carb-2V |
Ignition system
| Ignition coil Make | Bosch |
|---|---|
| Ignition coil Type | 0 221 119 008 |
| Ignition coil supply voltage + with ballast V | 11,0 |
| Primary resistance Ohm | 2,7-3,6 |
| Distributor (ECM) Make | Marelli |
| Distributor (ECM) No. | JF4/S145B |
| Contact breaker gap/trigger air gap mm | 0,38 |
| Dwell angle °(%) | 57-63 (63-70) |
Firing order
The firing order for the Alfa Romeo Alfetta 1.8 (1973–1978) is 1-3-4-2.
| Firing order | 1-3-4-2 |
|---|
Valve clearances
Valve clearances for the Alfa Romeo Alfetta 1.8 (1973–1978) are 0,50 mm inlet and 0,55 mm exhaust, measured cold.
| Valve clearance - INLET mm | 0,50 cold |
|---|---|
| Valve clearance - EXHAUST mm | 0,55 cold |
Engine oil & fluids
Engine oil
The Alfa Romeo Alfetta 1.8 (1973–1978) takes 6.6 litres of engine oil with the filter. The specified engine oil grade is SAE 10W-50 for moderate climates, with API/ACEA classification SE.
Manual gearbox
The manual gearbox has a listed capacity of 2.9 litres.
Coolant
The listed total cooling-system capacity is 8.0 litres.
Grades, filling conditions and capacities
| Engine oil options | |
|---|---|
| Ambient temperature range | Moderate climate |
| Engine oil grade SAE | 10W-50 |
| Engine oil classification API/ACEA | SE |
| Engine with filter(s) litres | 6.6 |
| Other lubricants and capacities | |
| Manual transmission litres | 2.9 |
| Cooling system - total capacity litres | 8.0 |
Service & electrical
Battery
The Alfa Romeo Alfetta 1.8 (1973–1978) uses a 12 V, 60 Ah battery (reserve capacity 90 minutes).
| Battery V/RC(Ah) | 12/90 (60) |
|---|
Spark plugs
The Alfa Romeo Alfetta 1.8 (1973–1978) uses Lodge 2HL spark plugs with a 0,55 mm electrode gap.
| Spark plugs Original equipment | Lodge |
|---|---|
| Spark plug Type | 2HL |
| Electrode gap mm | 0,55 |
| Spark plugs Make | Beru |
| Spark plug Type | 14-7DU |
| Electrode gap mm | 0,8 |
| Spark plugs Make | Bosch |
| Spark plug Type | W7DC |
| Electrode gap mm | 0,7 |
| Spark plugs Make | Champion |
| Spark plug Type | RN7YCC |
| Electrode gap mm | 0,7 |
| Spark plugs Make | NGK |
| Spark plug Type | B7ES |
| Electrode gap mm | 0,7 |
Tuning and emissions
| Static timing | 2-4 |
|---|---|
| Ignition advance | Without vacuum and basic timing |
| Ignition advance checks °Engine/rpm | 4-12/1000 |
| Ignition advance checks °Engine/rpm | 8-12/2500 |
| Ignition advance checks °Engine/rpm | 30-34/4200 |
| Idle speed rpm | 700 |
| Oil temperature °C | 70 |
| CO level at idle speed - tailpipe Vol. % CO | 3,5 Max |
| HC level at idle speed ppm | 400 |
| CO2 level at idle speed Vol. % CO2 | 13-16 |
| O2 level at idle speed Vol. % O2 | 0,5-2,0 |
Starting and charging
| Starter motor Make | Bosch |
|---|---|
| Starter motor Type | EF 12V 0,7 |
| Maximum cranking amps A | 162-198 |
| Alternator Make | Bosch |
| Voltage regulator Type | AD1/12V |
| Regulated voltage V | 13,9-14,8 |
Service checks and adjustments
| Oil pressure bar/rpm | 3,5-5,0 |
|---|---|
| Thermostat opens °C | 82 |
Fuel system
| Fuel pump delivery pressure bar | 0,4 |
|---|
Tightening torques
Cylinder head bolt torque
The cylinder head bolt torque for the Alfa Romeo Alfetta 1.8 (1973–1978) is 75 Nm.
| Cylinder head | |
|---|---|
| Tighten | 75 Nm |
| Cylinder head instructions | — |
|---|---|
| Other engine tightening torques | |
| Main bearings Stage 1 | 23-24 Nm |
| Main bearings Stage 2 | 46-49 Nm |
| Big end bearings Stage 1 | 17-25 Nm |
| Big end bearings Stage 2 | 35-51 Nm |
| Flywheel/driveplate | 95-98 Nm |
| Spark plugs | 24-34 Nm |
| Chassis tightening torques | |
| Road wheels | 90-110 Nm |
Frequently asked questions
What is the firing order of the Alfa Romeo Alfetta 1.8?
The firing order for the Alfa Romeo Alfetta 1.8 (1973–1978) is 1-3-4-2.
What spark plugs does the Alfa Romeo Alfetta 1.8 use?
The Alfa Romeo Alfetta 1.8 (1973–1978) uses Lodge 2HL spark plugs with a 0,55 mm electrode gap.
How much oil does the Alfa Romeo Alfetta 1.8 take?
The Alfa Romeo Alfetta 1.8 (1973–1978) takes 6.6 litres of engine oil with the filter. The specified engine oil grade is SAE 10W-50 for moderate climates, with API/ACEA classification SE.
What are the valve clearances for the Alfa Romeo Alfetta 1.8?
Valve clearances for the Alfa Romeo Alfetta 1.8 (1973–1978) are 0,50 mm inlet and 0,55 mm exhaust, measured cold.
What is the cylinder head torque for the Alfa Romeo Alfetta 1.8?
The cylinder head bolt torque for the Alfa Romeo Alfetta 1.8 (1973–1978) is 75 Nm.
What battery does the Alfa Romeo Alfetta 1.8 use?
The Alfa Romeo Alfetta 1.8 (1973–1978) uses a 12 V, 60 Ah battery (reserve capacity 90 minutes).