Alfa Romeo1985–1986Technical specifications

Arna 1.5: Technical specifications

Workshop data for the 1.5-litre petrol (engine code 310.16/305.20). Covers engine, fluids, service and torques: the figures to check before a job or a parts order.

Summary

Match the engine code (310.16/305.20) to the vehicle before ordering parts or applying these figures.

Vehicle specifications

Overview

Make: Alfa Romeo
Model: Arna
Years: 1985–1986
Fuel: Petrol
Engine code: 310.16/305.20

Performance & efficiency

Power: 70 kW (95 hp)
Engine size: 1,490 cc
Cylinders: 4 · OHC
Compression ratio: 9.0:1
Fuel system: Dellorto

Fluids & capacities

Engine oil (with the filter): 4.0 litres

All 83 specifications below

Engine & identification

Vehicle identification

No. of cylinders Type	4/OHC
Capacity (Fiscal) cc	1490 (1474)
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	Dellorto
Fuel system Type	DRLA 36S/D
Fuel system Description	Carb-2V

Ignition system

Ignition coil Make	Bosch
Ignition coil Type	0 221 119 027
Ignition coil supply voltage + with ballast V	11,0
Primary resistance Ohm	2,8-3,2
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 Arna 1.5 (1985–1986) is 1-3-2-4.

Firing order	1-3-2-4

Valve clearances

Valve clearances for the Alfa Romeo Arna 1.5 (1985–1986) 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 Arna 1.5 (1985–1986) takes 4.0 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 2.3 litres. The specified oil is SAE 80W-90.

Coolant

The listed total cooling-system capacity is 7.3 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	SE
Engine with filter(s) litres	4.0
Other lubricants and capacities
Manual transmission oil grade SAE	80W-90
Manual transmission litres	2.3
Cooling system - total capacity litres	7.3

Service & electrical

Ignition timing

Basic ignition timing for the Alfa Romeo Arna 1.5 (1985–1986) 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 Arna 1.5 (1985–1986) uses a 12 V, 36 Ah battery (reserve capacity 60 minutes).

Battery V/RC(Ah)	12/60 (36)

Spark plugs

The Alfa Romeo Arna 1.5 (1985–1986) 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	Beru
Spark plug Type	14-5DU
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	RN6YC
Electrode gap mm	0,6
Spark plugs Make	NGK
Spark plug Type	B7ES
Electrode gap mm	0,6

Tuning and emissions

Ignition advance	Without vacuum and basic timing
Ignition advance checks °Engine/rpm	0-6/1160
Ignition advance checks °Engine/rpm	18-22/2800
Ignition advance checks °Engine/rpm	24-28/6000
Vacuum check	Ignition timing advances
Vacuum range °Engine	11-15
Vacuum starts mbar	133
Vacuum ends mbar	400
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

Starter motor Make	Bosch
Starter motor Type	0 001 211 215
Minimum starting voltage V	10,0
Maximum cranking amps A	97-119
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

Compression pressure bar	10,3-10,5
Oil pressure bar/rpm	4,1-5,7/5500
Radiator cap bar	0,63-0,70
Thermostat opens °C	81-85
Drive belt size - alternator mm	9,5x875
Drive belt tension - alternator/PAS/AC mm	15

Fuel system

Fuel pump delivery pressure bar	0,18-0,30

Tightening torques

Other engine tightening torques
Cylinder head instructions	—
Main bearings Stage 1	—
View more information	—
Main bearings
Big end bearings Stage 1	21-24 Nm
Big end bearings Stage 2	43-48 Nm
Flywheel/driveplate	94-105 Nm
Crankshaft pulley/damper centre bolt	118-144 Nm
Spark plugs	25-34 Nm
Chassis tightening torques
Front hub	225-274 Nm
Road wheels	80-100 Nm

Frequently asked questions

What is the firing order of the Alfa Romeo Arna 1.5?

The firing order for the Alfa Romeo Arna 1.5 (1985–1986) is 1-3-2-4.

What spark plugs does the Alfa Romeo Arna 1.5 use?

The Alfa Romeo Arna 1.5 (1985–1986) uses Lodge 25HL spark plugs with a 0,6 mm electrode gap.

How much oil does the Alfa Romeo Arna 1.5 take?

The Alfa Romeo Arna 1.5 (1985–1986) takes 4.0 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 Arna 1.5?

Valve clearances for the Alfa Romeo Arna 1.5 (1985–1986) are 0,40 mm inlet and 0,50 mm exhaust, measured cold.

What is the ignition timing for the Alfa Romeo Arna 1.5?

Basic ignition timing for the Alfa Romeo Arna 1.5 (1985–1986) is 8°±1° BTDC at 900 rpm.

What battery does the Alfa Romeo Arna 1.5 use?

The Alfa Romeo Arna 1.5 (1985–1986) uses a 12 V, 36 Ah battery (reserve capacity 60 minutes).