🏷️ Basic Information

Make:

Alfa Romeo

Model:

155

Production Years Covered By Manual:

1992-1998

Chassis Codes:

155, 167 Series

👋 Introduction

Segment:

Compact Executive Sedan

Key Competitors:

BMW 3 Series (E36), Mercedes-Benz C-Class (W202), Audi 80/A4 (B4/8D), Volvo 850, Saab 900 NG.

Design Philosophy:

A blend of Italian styling flair, sporting dynamics, and practical usability, aiming to rival established German rivals with a more passionate driving experience.

Target Audience:

Enthusiast drivers and those seeking a stylish, well-performing European alternative in the compact executive segment.

Driving Dynamics:

Renowned for its engaging handling characteristics, direct steering, and spirited performance, often prioritizing driver feel over outright comfort.

📋 Manual Details

Engine Systems:

Engine Control, Fuel & Exhaust, Engine Lubrication, Engine Mechanical, Cooling System, Fuel System

Drivetrain Systems:

Transmission, Clutch & Gearbox, Propeller Shaft & Differential, Front & Rear Axle

Chassis Systems:

Brake System, Steering System, Suspension, Wheels & Tyres, Body & Chassis

Electrical Systems:

Electrical System, Lights and Switch, Wiring Diagrams

Comfort And Safety Systems:

Heater & Air Conditioning, Ventilation System, Interior Fittings, Safety systems

Diagnostic And Maintenance:

Maintenance, Technical Diagnostics, Fault Finding Diagnostics

Estimated Page Count:

Thousands (typical for comprehensive workshop manuals)

Type:

Workshop Service Repair Manual

Professional Use:

Designed for professional mechanics and experienced DIY enthusiasts, reflecting the level of detail found in official Alfa Romeo workshop documentation.

Language:

English

Download Format:

Digital Download (likely PDF)

📖 Manual Coverage

Engine Mechanical:

Detailed procedures for engine disassembly, assembly, cylinder head service, piston and connecting rod installation, crankshaft and camshaft timing, valve train adjustments, and lubrication system overhaul.

Engine Control And Fuel:

Comprehensive coverage of fuel injection systems (e.g., Bosch Motronic variations), ignition systems, sensor diagnostics, fuel pump and injector testing, exhaust gas recirculation (EGR), and emission control systems.

Transmission And Drivetrain:

In-depth guidance on manual transmission overhaul, clutch replacement, automatic transmission servicing (if applicable to specific models), propeller shaft balancing, driveshaft CV joint maintenance, and differential service.

Brake System:

Detailed instructions for brake caliper overhaul, disc and pad replacement, brake line bleeding, ABS system diagnostics and component testing, and parking brake adjustments.

Suspension And Steering:

Procedures for shock absorber and strut replacement, spring service, control arm bushings, ball joint inspection and replacement, power steering system troubleshooting, and steering rack overhaul.

Electrical System:

Extensive wiring diagrams for all vehicle circuits, component location guides, fuse and relay identification, starter and alternator testing, lighting system diagnostics, and power window/lock mechanisms.

Heating And Air Conditioning:

Service procedures for A/C system recharging, compressor replacement, evaporator and condenser service, heater core replacement, and climate control module diagnostics.

Body And Chassis:

Guidance on body panel repairs, door mechanism servicing, interior trim removal and installation, bumper repair, and basic structural integrity checks.

Fuel System Components:

Detailed coverage of fuel pumps, fuel filters, fuel injectors, pressure regulators, and associated lines and sensors.

Maintenance:

Scheduled maintenance tasks including oil changes, filter replacements, fluid level checks and top-offs, spark plug replacement, belt inspections and replacement, and brake fluid flushes.

Troubleshooting:

Systematic diagnostic procedures and fault-finding charts for identifying and resolving common and complex mechanical and electrical issues.

Repair And Overhaul:

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

Component Testing And Adjustment:

Specifications and methods for testing various electrical and mechanical components, as well as procedures for adjustments (e.g., valve lash, ignition timing).

Technical Diagnostics:

Covers systematic approaches to diagnosing faults using visual inspection, measurement tools, and diagnostic codes. Includes troubleshooting charts for common symptoms.

Fault Finding:

Detailed guides to identify the root cause of issues in engine, transmission, braking, electrical, and other systems.

Depth:

Comprehensive, covering everything from basic maintenance to in-depth engine and transmission rebuilds, suitable for professional mechanics.

Rebuild Specifications:

Includes precise tolerances, torque specifications, and assembly sequences required for engine, gearbox, and differential rebuilds.

📊 Manual Specifications

Digital Format:

Likely PDF, optimized for digital viewing and printing. Searchable text is highly probable for efficiency.

Image Resolution:

High resolution, ensuring clarity of diagrams and technical illustrations.

Digital Binding:

N/A (Digital Download)

Digital Paper Type:

N/A (Digital Download)

⚙️ Engine Specifications

Engine Options:

Various 4-cylinder Twin Spark (1.8L, 2.0L), 6-cylinder V6 (2.5L), and turbodiesel engines. Specific variants include the 1.8 TS (129 hp), 2.0 TS (150 hp), 2.0 V6 Turbo (188 hp), 2.5 V6 (166 hp), and 2.5 TD (125 hp).

Typical Horsepower Range:

120 hp to 200 hp, depending on engine variant.

Typical Torque Range:

180 Nm to 300 Nm, depending on engine variant.

Fuel Delivery:

Bosch L-Jetronic or Motronic fuel injection systems, depending on the specific engine and model year.

Valve Actuation:

Belt-driven camshafts, typically with two valves per cylinder in Twin Spark models and four valves per cylinder in V6 models.

Engine Mounting:

Transverse engine mounting with front-wheel drive or optional Q4 all-wheel drive.

Twin Spark Technology:

The 'Twin Spark' engines feature two spark plugs per cylinder, designed to improve combustion efficiency, fuel economy, and reduce emissions.

🔧 Transmission

Transmission Type:

5-speed manual transmission standard on most models.

Automatic Transmission:

Optional 4-speed automatic transmission available on some variants.

All Wheel Drive:

The 'Q4' designation indicates an optional viscous-coupling all-wheel-drive system.

📐 Dimensions

Length:

Approximately 4400 mm (173.2 in)

Width:

Approximately 1700 mm (66.9 in)

Height:

Approximately 1410 mm (55.5 in)

Curb Weight:

Ranges from approximately 1250 kg to 1450 kg, depending on engine and drivetrain.

🛡️ Safety Features

Crash Test Performance:

No standardized global crash ratings available for this era, but European models featured front airbags (driver and passenger) as standard on later versions and anti-lock braking systems (ABS).

Active Safety Features:

Anti-lock Braking System (ABS), Traction Control System (TCS) on some Q4 models.

Passive Safety Features:

Front seatbelts with pre-tensioners, driver and passenger airbags (standard on later models).

💡 Technology Features

Audio System:

Factory fitted radios with cassette players and CD changers (optional). Speaker systems varied by trim level.

ABS Integration:

ABS system, with diagnostic procedures for sensors, pump, and control module covered in the manual.

Internal Diagnostics:

On-board diagnostics (OBD) capabilities for engine management and other systems, with detailed diagnostic codes and troubleshooting pathways provided.

🔧 Maintenance

Oil Change Interval:

Typically every 10,000-15,000 km or 12 months, whichever comes first. Manual will specify exact intervals for different engine types.

Timing Belt Replacement:

Crucial for Twin Spark engines. Recommended replacement every 60,000 km or 5 years due to the risk of catastrophic engine damage if it breaks. The manual will detail this procedure and associated tensioner/water pump replacement.

Engine Oil:

Typically SAE 10W-40 or 5W-40, API SG/SH or ACEA A2/A3 specification. Manual will specify exact viscosity and API rating based on engine variant and climate.

Coolant:

Ethylene glycol-based coolant with corrosion inhibitors. Manual will specify the correct mixture ratio and type.

Brake Fluid:

DOT 3 or DOT 4 brake fluid. Manual will specify the correct type and bleeding procedure.

Transmission Fluid:

Manual gearbox: SAE 75W-90 GL-4 or GL-5 gear oil. Automatic gearbox: ATF Dexron III or equivalent. Manual will provide exact specifications and capacities.

Common Wear Items:

Worn suspension components (bushings, ball joints), aging ignition coils (Twin Spark), potential rust in wheel arches and sills, clutch wear, and the critical timing belt on Twin Spark engines.

Electrical Gremlins:

While not as notorious as some older Alfas, some owners report occasional minor electrical issues, often related to aging wiring or connectors. The detailed wiring diagrams in the manual are essential for diagnosing these.

Rust Prone Areas:

Common areas for corrosion include the rear wheel arches, sill panels, and sometimes the front strut towers. The manual may offer guidance on inspection and repair.

📚 Vehicle History

Alfa Romeo Legacy:

Alfa Romeo boasts a rich heritage in motorsport and performance car manufacturing, known for its passion, distinctive styling, and engaging driving dynamics.

155 Introduction:

The Alfa Romeo 155 was introduced in 1992 as the successor to the Alfa Romeo 75, based on the Fiat Type Two platform (shared with the Fiat Tempra and Lancia Dedra).

155 Facelift And Variants:

Received a significant facelift in 1995, with revised styling (particularly the front end and taillights), updated interior, and improved aerodynamics. Notable variants include the powerful 155 Q4 and the touring car homologation special, the 155 V6 TI Stradale.

Production Period:

1992 - 1997

Manufacturing Location:

Agile, Italy.

🏆 Awards & Recognition

Motorsport Success:

The Alfa Romeo 155 achieved significant success in touring car racing, notably in the DTM (German Touring Car Masters) with the V6 TI model driven by legends like Nicola Larini and Alessandro Nannini, which influenced some road-going variants' design and performance.