Alfa Romeo1985–1990Technical specifications

75 1.8: Technical specifications

Workshop data for the 1.8-litre petrol (engine code 062.02). Covers engine, fluids, brakes, service, torques and air conditioning: the figures to check before a job or a parts order.

Summary

Match the engine code (062.02) to the vehicle before ordering parts or applying these figures.

Vehicle specifications

Overview

Make: Alfa Romeo
Model: 75
Years: 1985–1990
Fuel: Petrol
Engine code: 062.02

Performance & efficiency

Power: 85 kW (116 hp)
Engine size: 1,779 cc
Cylinders: 4 · OHC
Fuel system: Weber

Fluids & capacities

Engine oil (with the filter): 5.6 litres

All 106 specifications below

Engine & identification

Vehicle identification

No. of cylinders Type	4/OHC
Capacity (Fiscal) cc	1779 (1767)
Suitable for unleaded petrol	Yes
Minimum octane rating RON	95
Ignition system Make	Marelli
Ignition system Type	TSZ-i
Ignition system Description	Trans-i
Trigger location	Distributor
Fuel system Make	Weber
Fuel system Type	40 DHLA
Fuel system Description	Carb-2V
Diagnostic socket	No

Ignition system

Ignition coil Make	Marelli
Ignition coil Type	SM 802BY
Ignition coil supply voltage + with ballast V	11,0
Primary resistance Ohm	0,64-0,84
Secondary resistance Ohm	7100-8700
Distributor (ECM) Make	Marelli
Distributor (ECM) No.	SM 802BX
Contact breaker gap/trigger air gap mm	0,5-0,6

Firing order

The firing order for the Alfa Romeo 75 1.8 (1985–1990) is 1-3-4-2.

Firing order	1-3-4-2

Valve clearances

Valve clearances for the Alfa Romeo 75 1.8 (1985–1990) 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 75 1.8 (1985–1990) takes 5.6 litres of engine oil with the filter.

A listed engine oil option is SAE 10W-40 for moderate climates, with API/ACEA classification SG/A2.

A listed engine oil option is SAE 10W-50 as an alternative for moderate climates, with API/ACEA classification SG/A2.

Manual gearbox

The manual gearbox has a listed capacity of 3.0 litres. The specified oil is SAE 75W-90.

Coolant

The listed total cooling-system capacity is 8.0 litres.

Grades, filling conditions and capacities

Lubricants and capacities — complete reference
Engine oil options
Ambient temperature range	Moderate climate
Engine oil grade SAE	10W-40
Engine oil classification API/ACEA	SG/A2
Ambient temperature range	Moderate climate alternative
Engine oil grade SAE	10W-50
Engine oil classification API/ACEA	SG/A2
Engine with filter(s) litres	5.6
Other lubricants and capacities
Manual transmission oil grade SAE	75W-90
Manual transmission litres	3.0
Cooling system - total capacity litres	8.0
Brake fluid Type	DOT 4
Brake fluid litres	0.6
Power steering fluid Type	Dexron II
Power steering fluid litres	1.0

Brakes & wear limits

Brake disc thickness

Brake discs on the Alfa Romeo 75 1.8 (1985–1990) are replaced at a minimum thickness of 9 mm (solid) or 20 mm (ventilated) front and 8 mm rear.

Minimum disc thickness for replacement - solid Front	9 mm
Minimum disc thickness for replacement - ventilated Front	20 mm
Minimum disc thickness for replacement Rear	8 mm

Brake disc and drum dimensions

Parking brake travel No. of notches	4-6

Service & electrical

Ignition timing

Basic ignition timing for the Alfa Romeo 75 1.8 (1985–1990) is 7°±1° BTDC at 900 rpm.

Ignition timing	Without vacuum
Ignition timing - basic BTDC °Engine/rpm	7±1/900

Battery

The Alfa Romeo 75 1.8 (1985–1990) uses a 12 V, 55 Ah battery (reserve capacity 85 minutes).

Battery V/RC(Ah)	12/85 (55)

Spark plugs

The Alfa Romeo 75 1.8 (1985–1990) uses Bosch W5DC spark plugs with a 0,7 mm electrode gap.

Spark plugs Original equipment	Bosch
Spark plug Type	W5DC
Electrode gap mm	0,7
Spark plugs Make	Autolite
Spark plug Type	63
Electrode gap mm	0,7
Spark plugs Make	Bosch
Spark plug Type	W5DC
Electrode gap mm	0,7
Spark plugs Make	Champion
Spark plug Type	RN7YCC
Electrode gap mm	0,8
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	4-8/1600
Ignition advance checks °Engine/rpm	9-12/2000
Ignition advance checks °Engine/rpm	27-31/5100
Vacuum range °Engine	13-19
Vacuum starts mbar	134
Vacuum ends mbar	212
Idle speed rpm	850-1000
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

Maximum cranking amps A	149-182
Alternator output A/V/rpm	55/14/2500
Voltage regulator Type	71 212 702
Regulated voltage V	13,8-14,2

Service checks and adjustments

Oil pressure bar/rpm	3,5-5,0
Drive belt size - alternator mm	9,5x825
Drive belt tension - alternator/PAS/AC mm	10

Fuel system

Fuel pump delivery pressure bar	0,20-0,27

Tightening torques

Cylinder head bolt torque

The cylinder head bolts on the Alfa Romeo 75 1.8 (1985–1990) are tightened in 4 stages: 35-55 Nm, then 71-73 Nm, then 75 Nm, then a final 76-78 Nm.

Cylinder head
Renew bolts	No
Tighten	35-55 Nm
Tighten	71-73 Nm
Run engine	15 minutes
Tighten	75 Nm
Run engine	600 miles/1000 km
Individually slacken off	360°
Tighten	76-78 Nm

Other engine tightening torques
Cylinder head instructions	—
Main bearings Renew bolts/nuts	No
Main bearings Stage 1	25 Nm
Main bearings Stage 2	50 Nm
Big end bearings Renew bolts/nuts	No
Big end bearings Stage 1	25 Nm
Big end bearings Stage 2	50 Nm
Flywheel/driveplate	110 Nm
Crankshaft pulley/damper centre bolt	187-195 Nm
Camshaft carrier/cap	20-22 Nm
Spark plugs	25-35 Nm
Chassis tightening torques
Rear hub	265-324 Nm
Steering track rod end	45-55 Nm
Brake caliper/carrier to hub Front	80 Nm
Brake caliper/carrier to hub Rear	49 Nm
Road wheels	98 Nm

Air conditioning

Air conditioning refrigerant Type	R12
Air conditioning refrigerant quantity grams	900
Air conditioning oil Type	Suniso 5GS

Frequently asked questions

What is the firing order of the Alfa Romeo 75 1.8?

The firing order for the Alfa Romeo 75 1.8 (1985–1990) is 1-3-4-2.

What spark plugs does the Alfa Romeo 75 1.8 use?

The Alfa Romeo 75 1.8 (1985–1990) uses Bosch W5DC spark plugs with a 0,7 mm electrode gap.

How much oil does the Alfa Romeo 75 1.8 take?

The Alfa Romeo 75 1.8 (1985–1990) takes 5.6 litres of engine oil with the filter. A listed engine oil option is SAE 10W-40 for moderate climates, with API/ACEA classification SG/A2. A listed engine oil option is SAE 10W-50 as an alternative for moderate climates, with API/ACEA classification SG/A2.

What are the valve clearances for the Alfa Romeo 75 1.8?

Valve clearances for the Alfa Romeo 75 1.8 (1985–1990) are 0,50 mm inlet and 0,55 mm exhaust, measured cold.

What is the cylinder head torque for the Alfa Romeo 75 1.8?

The cylinder head bolts on the Alfa Romeo 75 1.8 (1985–1990) are tightened in 4 stages: 35-55 Nm, then 71-73 Nm, then 75 Nm, then a final 76-78 Nm.

What is the ignition timing for the Alfa Romeo 75 1.8?

Basic ignition timing for the Alfa Romeo 75 1.8 (1985–1990) is 7°±1° BTDC at 900 rpm.