🏷️ Basic Information

Make:

Alfa Romeo

Model:

155

Production Years:

1992-1998

Chassis Codes:

167

👋 Introduction

Positioning:

The Alfa Romeo 155 was positioned as a compact executive car, known for its sporting character, distinctive Italian styling, and front-wheel-drive (or optional Q4 all-wheel-drive) platform.

Competitors:

Competed against vehicles like the BMW 3 Series, Mercedes-Benz C-Class, Audi 80/A4, and Volvo S40 during its production run.

Styling:

Designed by Ercole Spada, featuring a wedge-shaped profile and a distinctive front grille. Later models featured improved aerodynamics and styling updates.

Drivetrain Options:

Offered in front-wheel drive (FWD) and the acclaimed Q4 all-wheel drive (AWD) configurations, which featured a viscous coupling and a Torsen differential.

📋 Manual Details

Covered Years:

1992, 1993, 1994, 1995, 1996, 1997, 1998

Estimated Pages:

Extensive (Typical of full workshop manuals, likely 1000+ pages when compiled)

Type:

Workshop Service Repair Manual

Language:

English

Format:

Digital Download (PDF)

📖 Manual Coverage

Engine Mechanical:

Complete overhaul procedures for engine blocks, cylinder heads, pistons, crankshafts, camshafts, valve trains, etc.

Engine Control System:

Diagnosis and repair of ECU, sensors (knock, camshaft position, speed sensors), actuators, and emission control systems.

Fuel System:

Fuel pump, injectors, throttle body, fuel tank, charcoal canister, fuel pressure regulation, and EFI system.

Cooling System:

Radiator, water pump, thermostat, cooling fan system, coolant types, and bleeding procedures.

Lubrication System:

Oil pump, oil filter, lubrication passages, and oil specifications.

Ignition System:

Spark plugs, ignition coils, distributors (if applicable), and ignition timing.

Exhaust System:

Exhaust pipes, mufflers, catalytic converters, and emission control systems.

Transmission Manual:

Manual transaxle assembly, clutch system (master cylinder, slave cylinder, clutch unit, pedal), torque converter clutch, and fluid specifications.

Transmission Automatic:

Automatic transaxle assembly, valve body, control cables, fluid specifications, and diagnosis.

Drive Train:

Front drive shafts, output shafts, differential case, and associated seals.

Chassis:

General chassis structure and repair procedures.

Suspension Front:

Front suspension arms, shock absorbers, coil springs, stabilizer bar, and wheel alignment.

Suspension Rear:

Rear suspension systems, shock absorbers, coil springs, and rear wheel alignment.

Steering System:

Steering system, steering column, steering sensors, power steering link, and steering gear box.

Brakes System:

Brake system, front and rear brakes, brake master cylinder, booster, fluid specifications, parking brake, and skid control sensors.

Wheel And Tire System:

Tire and wheel specifications, mounting, and maintenance.

Lighting System:

Headlamps, tail lamps, turn signals, license plate lamps, and interior lighting.

Electrical System:

Wiring diagrams, wire harness repair, starter system, generator/charging system, battery, and electrical component diagnosis.

Safety Systems:

Supplemental Restraint System (SRS), airbags (front, side, curtain), seat belt warning system, shift lock system, and yaw rate sensors.

Body Repair:

Body panel repair, glass replacement (windshield, quarter, back door), weatherstripping, door frames, bumpers, and roof headlining.

Interior Systems:

Seats, seat belts, instrument panel, audio-visual system, air conditioning, heater, power window control, power door locks, and sunroof systems.

Wipers And Washers:

Wiper motors, blades, washer systems, nozzles, and switches.

Maintenance:

Regular maintenance, fluid changes, filter replacements, inspections, and lubrication.

Troubleshooting:

Diagnostic procedures, common fault finding, and symptom-based repair guidance.

Repair:

Detailed step-by-step repair instructions for all major vehicle systems, including component disassembly and reassembly.

Wiring Diagrams:

Comprehensive wiring diagrams for all electrical circuits.

Torque Specifications:

All necessary torque specifications for fasteners during repair and assembly.

Engine Rebuild:

Detailed procedures for engine disassembly, inspection, repair, and reassembly, including piston ring gap, bearing clearances, and cylinder head resurfacing.

Transmission Rebuild:

Step-by-step instructions for overhauling both manual and automatic transmissions.

Suspension And Steering Geometry:

Includes specifications and procedures for alignment adjustments of both front and rear suspensions.

Diagnostic Charts:

Troubleshooting charts to help diagnose common problems based on symptoms.

Depth:

Full factory-level diagnostic and repair coverage, suitable for professional technicians and experienced DIY enthusiasts.

Diagnostic Tools:

While the manual itself is not a diagnostic tool, it provides the necessary information to interpret data from specialized diagnostic equipment used by technicians.

📊 Manual Specifications

File Format:

PDF

Searchability:

Likely searchable text for easy navigation and information retrieval.

Quality:

High resolution, clear text and diagrams suitable for printing.

Binding:

N/A (Digital)

Paper Type:

N/A (Digital)

Scope:

Comprehensive, covering all aspects of maintenance, repair, troubleshooting, and diagnostics as used by dealership technicians.

⚙️ Engine Specifications

Engine Options:

Varied widely including 1.7L, 1.8L, 2.0L (Twin Spark), 2.5L V6, and 2.0L Turbo 4-cylinder engines for the Q4 models.

Typical Horsepower Range:

Approximately 115 hp to 190 hp, depending on the engine variant and market.

Engine Technology:

Featured Alfa Romeo's Twin Spark ignition system for enhanced combustion efficiency and performance in many gasoline engines.

Injection Type:

Multi-point fuel injection (MPI) was standard across most gasoline engines.

Fuel Recommendation:

Unleaded gasoline, octane rating typically 95 RON (Premium Unleaded).

🔧 Transmission

Standard Transmission:

5-speed manual transaxle

Optional Transmission:

4-speed automatic transmission (available on some variants)

Q4 Drivetrain:

The Q4 model featured a permanent all-wheel-drive system with a 3-differential setup (front, center, and rear) for superior traction and handling.

📐 Dimensions

Length:

Approximately 4,285 mm (168.7 inches)

Width:

Approximately 1,700 mm (66.9 inches)

Height:

Approximately 1,420 mm (55.9 inches)

Curb Weight:

Approximately 1,250 kg - 1,450 kg (2,755 lbs - 3,197 lbs), depending on engine and configuration.

Wheelbase:

Approximately 2,550 mm (100.4 inches)

🛡️ Safety Features

Crash Test Results:

Specific official ratings from organizations like Euro NCAP for this period are less common, but the vehicle was equipped with safety features for its era.

ABS:

Anti-lock Braking System (ABS) was available as standard or optional depending on the trim level and year.

Traction Control:

Traction control (ASR) was often available on higher-trim or Q4 models.

Airbags:

Driver airbag was standard on most models. Passenger, side, and curtain airbags were introduced in later production years or on higher trims.

Seat Belts:

Pre-tensioning front seat belts and three-point rear seat belts were standard.

💡 Technology Features

Audio System:

Factory fitted radio/cassette or CD players, often with speaker systems in doors and rear parcel shelf. Manual covers removal and installation of audio components.

ABS And Traction Control:

ABS and ASR systems are detailed for diagnosis and repair, including sensor function and hydraulic unit operation.

Wiring Diagrams Utility:

The inclusion of detailed wiring diagrams is crucial for diagnosing and repairing any issues within the vehicle's electrical system, including sensors, control modules, and actuators.

🔧 Maintenance

Oil Change Interval:

Typically every 10,000 - 15,000 km (6,000 - 9,000 miles) or annually, whichever comes first.

Timing Belt Replacement:

Crucial for Twin Spark and V6 engines. Intervals vary but are often around 60,000 - 100,000 km (37,000 - 62,000 miles) or 5-7 years. This manual would detail the exact procedure and associated parts.

Engine Oil:

Typically SAE 10W-40 or 15W-40 (API SG/SH or higher), but specific recommendations depend on engine and climate. Check the manual for precise ACEA or manufacturer specifications.

Coolant:

Ethylene glycol based antifreeze, typically a 50/50 mix with distilled water. Manual will specify Alfa Romeo approved coolant or equivalent.

Brake Fluid:

DOT 3 or DOT 4 brake fluid. Manual will specify the exact requirement and change interval.

Transmission Fluid Manual:

GL-4 or GL-5 gear oil with appropriate viscosity (e.g., 75W-90). Specific grade is critical.

Transmission Fluid Automatic:

Specific ATF fluid (e.g., Dexron-III or equivalent). The manual will detail the exact type and capacity.

Common Problems:

Rust on body panels (wheel arches, sills), aging electrical components, potential issues with timing belts and water pumps on Twin Spark engines, and wear on suspension bushings.

Diagnosis Tips:

The manual provides essential diagnostic trees for electrical faults, engine performance issues, and mechanical problems. Understanding sensor readings and error codes is key.

📚 Vehicle History

Alfa Romeo Legacy:

Alfa Romeo has a rich heritage in motorsport and performance-oriented vehicles, known for its engaging driving dynamics and Italian design flair.

Generations:

The 155 represents a significant step for Alfa Romeo in the compact executive segment, succeeding the 75 and preceding the 156. It saw design refreshes and powertrain updates throughout its lifecycle.

Manufacturing Location:

Primarily manufactured in Italy.

Motorsport Success:

The 155 achieved considerable success in touring car racing, most notably in the DTM (Deutsche Tourenwagen Meisterschaft) with its Q4-based silhouette, driven by legendary drivers like Nicola Larini and Alessandro Nannini.

🏆 Awards & Recognition

Motorsport Accolades:

Significant success in touring car championships, including the DTM, which enhanced the model's performance image.