Alfa Romeo1992–1998Technical specifications

155 1.7: Technical specifications

Workshop data for the 1.7-litre petrol (engine code 671.05). Covers engine, fluids, brakes, service, torques and air conditioning: the figures to check before a job or a parts order.

Common faults & fixes

Summary

Match the engine code (671.05) to the vehicle before ordering parts or applying these figures.

Vehicle specifications

Overview

Make: Alfa Romeo
Model: 155
Years: 1992–1998
Fuel: Petrol
Engine code: 671.05

Performance & efficiency

Power: 85 kW (116 hp)
Engine size: 1,748 cc
Cylinders: 4 · DOHC
Compression ratio: 10.0:1
Fuel system: Bosch

Fluids & capacities

Engine oil (with the filter): 5.0 litres

All 120 specifications below

Engine & identification

Vehicle identification

No. of cylinders Type	4/DOHC
Capacity (Fiscal) cc	1748
Compression ratio :1	10,0
Suitable for unleaded petrol	Yes
Minimum octane rating RON	95
Ignition system Make	Bosch
Ignition system Type	Motronic M1.7
Ignition system Description	Map-DIS
Trigger location	Crankshaft
Fuel system Make	Bosch
Fuel system Type	Motronic M1.7
Fuel system Description	MFI-i
Air metering Type	Flow
Combined ignition and fuel ECM	Yes
Diagnostic socket	Yes

Ignition system

Ignition coil supply voltage + with ballast V	11,0
Primary resistance Ohm	0,5
Distributor (ECM) Make	(Bosch)

Firing order

The firing order for the Alfa Romeo 155 1.7 (1992–1998) is 1-3-4-2.

Firing order	1-3-4-2

Valve clearances

Valve clearances for the Alfa Romeo 155 1.7 (1992–1998) are 0,38-0,45 mm inlet and 0,43-0,50 mm exhaust, measured cold.

Valve clearance - INLET mm	0,38-0,45 cold
Valve clearance - EXHAUST mm	0,43-0,50 cold

Engine oil & fluids

Engine oil

The Alfa Romeo 155 1.7 (1992–1998) takes 5.0 litres of engine oil with the filter.

See the reference table for the complete engine oil entries and their conditions.

Manual gearbox

The manual gearbox has a listed capacity of 2.0 litres. The specified oil is SAE 75W-90 semi-synthetic.

Coolant

The listed total cooling-system capacity is 8.3 litres.

Grades, filling conditions and capacities

Lubricants and capacities — complete reference
Engine oil options
Ambient temperature range	All temperatures
Engine oil grade SAE	5W-30 Synthetic
Engine oil classification API/ACEA	SJ/A1
Ambient temperature range	-20°C➞
Engine oil grade SAE	10W-40 Synthetic
Engine oil classification API/ACEA	SJ/A3
Engine with filter(s) litres	5.0
Other lubricants and capacities
Manual transmission oil grade SAE	75W-90 Semi-synthetic
Manual transmission litres	2.0
Cooling system - total capacity litres	8.3
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 155 1.7 (1992–1998) are replaced at a minimum thickness of 18,2 mm (ventilated) front and 9,2 mm rear.

Minimum disc thickness
Minimum disc thickness for replacement - ventilated Front	18,2 mm
Minimum disc thickness for replacement Rear	9,2 mm

Brake disc and drum dimensions

Minimum disc thickness
Disc runout Front	0,15 mm
Disc runout Rear	0,15 mm
Minimum pad thickness Front	3 mm
Minimum pad thickness Rear	3 mm
Parking brake travel No. of notches	3-7

Service & electrical

Ignition timing

The ignition timing on the Alfa Romeo 155 1.7 (1992–1998) is not adjustable.

Ignition timing - basic BTDC °Engine/rpm	Not adjustable

Battery

The Alfa Romeo 155 1.7 (1992–1998) uses a 12 V, 60 Ah battery (reserve capacity 90 minutes).

Battery V/RC(Ah)	12/90 (60)

Spark plugs

The Alfa Romeo 155 1.7 (1992–1998) uses Champion C6YCC spark plugs with a 0,7 mm electrode gap.

Spark plugs Original equipment	Champion
Spark plug Type	C6YCC
Electrode gap mm	0,7
Spark plugs Make	Autolite
Spark plug Type	3923
Electrode gap mm	0,7
Spark plugs Make	Beru
Spark plug Type	14F-5DU
Electrode gap mm	0,8
Spark plugs Make	Bosch
Spark plug Type	F5DC
Electrode gap mm	0,7
Spark plugs Make	Champion
Spark plug Type	C6YCC
Electrode gap mm	0,7
Spark plugs Make	NGK
Spark plug Type	BCP6ES
Electrode gap mm	0,8

Tuning and emissions

Ignition advance checks °Engine/rpm	ECM Controlled
Idle speed rpm	840±50 Not adjustable
Oil temperature °C	60
CO level at idle speed - tailpipe Vol. % CO	0,5 max Not adjustable
HC level at idle speed ppm	100
CO2 level at idle speed Vol. % CO2	14,5-16
O2 level at idle speed Vol. % O2	0,1-0,5
Increased idle speed for CO test rpm	2500-2900
CO content at increased idle speed Vol. %	0,3
Lambda at increased idle λ	0,97-1,03

Starting and charging

Maximum cranking amps A	162-198
Alternator output A/V/rpm	40/14/1600

Service checks and adjustments

Oil pressure bar/rpm	5,0/4000
Radiator cap bar	0,98
Thermostat opens °C	85-89

Fuel system

System pressure bar	2,8-3,2
Regulated pressure with vacuum bar	2,3-2,7
Injector Ohm	16,0
Lambda sensor (Oxygen) heater Ohm	3,0

Tightening torques

Cylinder head bolt torque

The cylinder head bolts on the Alfa Romeo 155 1.7 (1992–1998) are tightened in 3 stages: 38-42 Nm, then 76-84 Nm, then a final 83-91 Nm.

Cylinder head
Renew bolts	No
Tighten	38-42 Nm
Tighten	76-84 Nm
Run engine	600 miles/1000 km
Individually slacken off	360°
Tighten	83-91 Nm

Other engine tightening torques
Cylinder head instructions	—
Main bearings Renew bolts/nuts	No
Main bearings Stage 1	20 Nm
Main bearings Stage 2	115°
Big end bearings Renew bolts/nuts	No
Big end bearings Stage 1	25-27 Nm
Big end bearings Stage 2	49-54 Nm
Flywheel/driveplate	116-128 Nm
Clutch pressure plate	33-40 Nm
Crankshaft pulley/damper centre bolt	209-231 Nm
Camshaft sprocket/gear	—
Camshaft sprocket/gear
Camshaft carrier/cap	20-22 Nm
Camshaft/rocker cover	10-16 Nm
Spark plugs	28-35 Nm
Lambda sensor (Oxygen)	50-60 Nm
Chassis tightening torques
Front hub	266-294 Nm
Rear hub	304-336 Nm
Steering track rod end	29-36 Nm
Brake disc to hub Front	5-12 Nm
Brake caliper to carrier Front	45-55 Nm
Brake caliper/carrier to hub Front	20-25 Nm
Brake disc to hub Rear	5,4-12,6 Nm
Brake caliper to carrier Rear	45-55 Nm
Brake caliper/carrier to hub Rear	20-25 Nm
Road wheels	82±9 Nm Alu=93±10 Nm

Air conditioning

No. of AC service connectors	2
Air conditioning restrictor type	Expansion valve
Compressor clutch/magnetic coupling	Yes
Compressor variable displacement solenoid	No
Air conditioning refrigerant Type	R134a
Air conditioning refrigerant quantity grams	700
Air conditioning oil group	PAG
Air conditioning oil Type	SP10
Air conditioning oil quantity cm³	240
Air conditioning oil viscosity ISO	46

Frequently asked questions

What is the firing order of the Alfa Romeo 155 1.7?

The firing order for the Alfa Romeo 155 1.7 (1992–1998) is 1-3-4-2.

What spark plugs does the Alfa Romeo 155 1.7 use?

The Alfa Romeo 155 1.7 (1992–1998) uses Champion C6YCC spark plugs with a 0,7 mm electrode gap.

How much oil does the Alfa Romeo 155 1.7 take?

The Alfa Romeo 155 1.7 (1992–1998) takes 5.0 litres of engine oil with the filter. See the reference table for the complete engine oil entries and their conditions.

What are the valve clearances for the Alfa Romeo 155 1.7?

Valve clearances for the Alfa Romeo 155 1.7 (1992–1998) are 0,38-0,45 mm inlet and 0,43-0,50 mm exhaust, measured cold.

What is the cylinder head torque for the Alfa Romeo 155 1.7?

The cylinder head bolts on the Alfa Romeo 155 1.7 (1992–1998) are tightened in 3 stages: 38-42 Nm, then 76-84 Nm, then a final 83-91 Nm.

What is the ignition timing for the Alfa Romeo 155 1.7?

The ignition timing on the Alfa Romeo 155 1.7 (1992–1998) is not adjustable.