Alfa Romeo1983–1987Technical specifications

33 1.4: Technical specifications

Workshop data for the 1.4-litre petrol (engine code 305.02). Covers engine, fluids, service and torques: the figures to check before a job or a parts order.

Summary

Match the engine code (305.02) to the vehicle before ordering parts or applying these figures.

Vehicle specifications

Overview

Make: Alfa Romeo
Model: 33
Years: 1983–1987
Fuel: Petrol
Engine code: 305.02

Performance & efficiency

Power: 55 kW (75 hp)
Engine size: 1,351 cc
Cylinders: 4 · OHC
Compression ratio: 9.0:1
Fuel system: Weber

Fluids & capacities

Engine oil (with the filter): 4.0 litres

All 84 specifications below

Engine & identification

Vehicle identification

No. of cylinders Type	4/OHC
Capacity (Fiscal) cc	1351 (1337)
Compression ratio :1	9,0
Suitable for unleaded petrol	Yes
Minimum octane rating RON	98/95
Ignition system Make	Bosch
Ignition system Type	TSZ-i
Ignition system Description	Trans-i
Fuel system Make	Weber
Fuel system Type	36 IDF
Fuel system Description	Carb-2V

Ignition system

Ignition coil Make	Bosch
Ignition coil Type	0 221 600 002
Ignition coil supply voltage + with ballast V	11,0
Primary resistance Ohm	0,7-1,0
Secondary resistance Ohm	6700-9600
Distributor (ECM) Make	Bosch
Distributor (ECM) No.	0 237 005 004

Firing order

The firing order for the Alfa Romeo 33 1.4 (1983–1987) is 1-3-2-4.

Firing order	1-3-2-4

Valve clearances

Valve clearances for the Alfa Romeo 33 1.4 (1983–1987) are 0,40 mm inlet and 0,50 mm exhaust, measured cold.

Valve clearance - INLET mm	0,40 cold
Valve clearance - EXHAUST mm	0,50 cold

Engine oil & fluids

Engine oil

The Alfa Romeo 33 1.4 (1983–1987) takes 4.0 litres of engine oil with the filter.

A listed engine oil option is SAE 10W-50 for moderate climates, with API/ACEA classification SF.

A listed engine oil option is SAE 15W-50 as an alternative for moderate climates.

Manual gearbox

The manual gearbox has a listed capacity of 2.6 litres. The specified oil is SAE 80W-90.

Coolant

The listed total cooling-system capacity is 7.0 litres.

Grades, filling conditions and capacities

Lubricants and capacities — complete reference
Engine oil options
Ambient temperature range	Moderate climate
Engine oil grade SAE	10W-50
Engine oil classification API/ACEA	SF
Ambient temperature range	Moderate climate alternative
Engine oil grade SAE	15W-50
Engine with filter(s) litres	4.0
Other lubricants and capacities
Manual transmission oil grade SAE	80W-90
Manual transmission litres	2.6
Cooling system - total capacity litres	7.0
Brake fluid Type	ATE S

Service & electrical

Ignition timing

Basic ignition timing for the Alfa Romeo 33 1.4 (1983–1987) is 8°±1° BTDC at 900 rpm.

Ignition timing	Without vacuum
Ignition timing - basic BTDC °Engine/rpm	8±1/900
Ignition timing - alternative °Engine/rpm	95=5±1/900

Battery

The Alfa Romeo 33 1.4 (1983–1987) uses a 12 V, 36 Ah battery (reserve capacity 65 minutes).

Battery V/RC(Ah)	12/65 (36)

Spark plugs

The Alfa Romeo 33 1.4 (1983–1987) uses Lodge 25HL spark plugs with a 0,6 mm electrode gap.

Spark plugs Original equipment	Lodge
Spark plug Type	25HL
Electrode gap mm	0,6
Spark plugs Make	Autolite
Spark plug Type	63
Electrode gap mm	0,7
Spark plugs Make	Bosch
Spark plug Type	W6DC
Electrode gap mm	0,7
Spark plugs Make	Champion
Spark plug Type	RN6YC
Electrode gap mm	0,6
Spark plugs Make	NGK
Spark plug Type	BP6ES
Electrode gap mm	0,8

Tuning and emissions

Ignition advance	Without vacuum and basic timing
Ignition advance checks °Engine/rpm	0-1/850
Ignition advance checks °Engine/rpm	7-11/1600
Ignition advance checks °Engine/rpm	24-28/3600
Vacuum check	Ignition timing advances
Vacuum range °Engine	11-15
Vacuum starts mbar	120
Vacuum ends mbar	450
Idle speed rpm	900-1000
Oil temperature °C	70
CO level at idle speed - tailpipe Vol. % CO	3,5 Max
HC level at idle speed ppm	300
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	0 001 211 215
Minimum starting voltage V	10,0
Maximum cranking amps A	119-145
Alternator Make	Bosch
Alternator Type	0 120 489 798
Alternator output A/V/rpm	45/14/2000
Regulated voltage V	13,7-14,5

Service checks and adjustments

Oil pressure bar/rpm	4,5 Max
Thermostat opens °C	81-85
Drive belt size - alternator mm	9,5x888
Drive belt tension - alternator/PAS/AC mm	15

Fuel system

Fuel pump delivery pressure bar	0,4

Tightening torques

Other engine tightening torques
Cylinder head instructions	—
Main bearings Stage 1	—
View more information	—
Main bearings
Big end bearings Stage 1	22-24 Nm
Big end bearings Stage 2	44-49 Nm
Flywheel/driveplate	96-107 Nm
Crankshaft pulley/damper centre bolt	118-144 Nm
Spark plugs	25-33 Nm
Chassis tightening torques
Front hub	225-274 Nm
Road wheels	88-108 Nm

Frequently asked questions

What is the firing order of the Alfa Romeo 33 1.4?

The firing order for the Alfa Romeo 33 1.4 (1983–1987) is 1-3-2-4.

What spark plugs does the Alfa Romeo 33 1.4 use?

The Alfa Romeo 33 1.4 (1983–1987) uses Lodge 25HL spark plugs with a 0,6 mm electrode gap.

How much oil does the Alfa Romeo 33 1.4 take?

The Alfa Romeo 33 1.4 (1983–1987) takes 4.0 litres of engine oil with the filter. A listed engine oil option is SAE 10W-50 for moderate climates, with API/ACEA classification SF. A listed engine oil option is SAE 15W-50 as an alternative for moderate climates.

What are the valve clearances for the Alfa Romeo 33 1.4?

Valve clearances for the Alfa Romeo 33 1.4 (1983–1987) are 0,40 mm inlet and 0,50 mm exhaust, measured cold.

What is the ignition timing for the Alfa Romeo 33 1.4?

Basic ignition timing for the Alfa Romeo 33 1.4 (1983–1987) is 8°±1° BTDC at 900 rpm.

What battery does the Alfa Romeo 33 1.4 use?

The Alfa Romeo 33 1.4 (1983–1987) uses a 12 V, 36 Ah battery (reserve capacity 65 minutes).