Engine & identification
Vehicle identification
| No. of cylinders Type | 8/OHC |
|---|---|
| Capacity (Fiscal) cc | 2593 |
| Compression ratio :1 | 9,0 |
| Suitable for unleaded petrol | No |
| Minimum octane rating RON | 98 |
| Ignition system Make | Bosch |
| Ignition system Type | SZ |
| Ignition system Description | CB |
| Fuel system Make | Bosch |
| Fuel system Description | MFI-c |
Ignition system
| Ignition coil Make | Bosch |
|---|---|
| Ignition coil Type | 0 231 129 036 |
| Primary resistance Ohm | 2,9-3,4 |
| Distributor (ECM) Make | Bosch |
| Distributor (ECM) No. | 0 231 129 036 |
| Contact breaker gap/trigger air gap mm | 0,35 |
| Dwell angle °(%) | 31-37 |
Firing order
The firing order for the Alfa Romeo Montreal 2.6 (1970–1976) is 1-5-4-2-6-3-7-8.
| Firing order | 1-5-4-2-6-3-7-8 |
|---|
Valve clearances
Valve clearances for the Alfa Romeo Montreal 2.6 (1970–1976) 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 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 2.0 litres.
Coolant
The listed total cooling-system capacity is 12.0 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 |
| Other lubricants and capacities | |
| Manual transmission litres | 2.0 |
| Differential rear litres | 2.5 |
| Cooling system - total capacity litres | 12.0 |
Service & electrical
Battery
The Alfa Romeo Montreal 2.6 (1970–1976) uses a 12 V, 60 Ah battery (reserve capacity 90 minutes).
| Battery V/RC(Ah) | 12/90 (60) |
|---|
Spark plugs
The Alfa Romeo Montreal 2.6 (1970–1976) uses Champion RN6YC spark plugs with a 0,7 mm electrode gap.
| Spark plugs Original equipment | Lodge |
|---|---|
| Spark plug Type | 2HL |
| Electrode gap mm | 0,5-0,6 |
| Spark plugs Make | Champion |
| Spark plug Type | RN6YC |
| 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 timing | Without vacuum |
| Ignition timing - basic BTDC °Engine/rpm | 37-40/4600 |
| Ignition advance | Without vacuum and basic timing |
| Ignition advance checks °Engine/rpm | 1-9/1000 |
| Ignition advance checks °Engine/rpm | 12-22/2000 |
| Ignition advance checks °Engine/rpm | 17-28/3000 |
| Idle speed rpm | 850 |
| Oil temperature °C | 70 |
| HC level at idle speed ppm | 500 |
| 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 | 0 001 211 987 |
| Minimum starting voltage V | 9,0 |
| Maximum cranking amps A | 162-198 |
| Alternator Make | Bosch |
| Voltage regulator Type | 0 190 601 006 |
| Regulated voltage V | 13,9-14,8 |
Service checks and adjustments
| Drive belt size - alternator mm | 12,5x850 |
|---|---|
| Drive belt tension - alternator/PAS/AC mm | 10 |
Tightening torques
Cylinder head bolt torque
The cylinder head bolt torque for the Alfa Romeo Montreal 2.6 (1970–1976) is 77-79 Nm.
| Cylinder head | |
|---|---|
| Tighten | 77-79 Nm |
| Cylinder head instructions | — |
|---|---|
| Other engine tightening torques | |
| Main bearings Stage 1 | 30-31 Nm |
| Main bearings Stage 2 | 60-62 Nm |
| Big end bearings Stage 1 | 20-21 Nm |
| Big end bearings Stage 2 | 40-42 Nm |
| Flywheel/driveplate | 52-56 Nm |
| Spark plugs | 25-35 Nm |
| Chassis tightening torques | |
| Road wheels | 60-80 Nm |
Frequently asked questions
What is the firing order of the Alfa Romeo Montreal 2.6?
The firing order for the Alfa Romeo Montreal 2.6 (1970–1976) is 1-5-4-2-6-3-7-8.
What spark plugs does the Alfa Romeo Montreal 2.6 use?
The Alfa Romeo Montreal 2.6 (1970–1976) uses Champion RN6YC spark plugs with a 0,7 mm electrode gap.
How much oil does the Alfa Romeo Montreal 2.6 take?
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 Montreal 2.6?
Valve clearances for the Alfa Romeo Montreal 2.6 (1970–1976) are 0,50 mm inlet and 0,55 mm exhaust, measured cold.
What is the cylinder head torque for the Alfa Romeo Montreal 2.6?
The cylinder head bolt torque for the Alfa Romeo Montreal 2.6 (1970–1976) is 77-79 Nm.
What battery does the Alfa Romeo Montreal 2.6 use?
The Alfa Romeo Montreal 2.6 (1970–1976) uses a 12 V, 60 Ah battery (reserve capacity 90 minutes).