🏷️ Basic Information Identification Make: Alfa Romeo Model: 155 Years Covered: 1992-1998 Codes Chassis Codes: 155, 155Q4 👋 Introduction Market Position Segment: Compact executive car (D-segment) Competitive Analysis Key Competitors: BMW 3 Series (E36), Mercedes-Benz C-Class (W202), Audi A4 (B5), Ford Mondeo, Vauxhall/Opel Vectra. Key Features Design Philosophy: Blended the mechanical sophistication of Alfa Romeo with a more practical and spacious design compared to its predecessor, the 75. Unique Selling Points: Distinctive Italian styling, engaging driving dynamics, advanced engine technology (Twin Spark, V6 Busso), availability of Q4 all-wheel-drive. 📋 Manual Details Coverage Areas Market Regions: Global (primarily Europe) Vehicle Variants: All Alfa Romeo 155 variants produced between 1992 and 1998, including saloon/sedan body styles and Q4 all-wheel-drive models. Page Count Estimated Pages: Thousands (typical for comprehensive workshop manuals) Manual Type Type: Professional Workshop Service & Repair Manual Language Language: English Format Digital Format: Acrobat PDF Compatibility: Windows & MAC compatible 📖 Manual Coverage Systems Covered Powertrain: Engine mechanical (including Twin Spark and V6 Busso), engine management, fuel system, cooling system, lubrication system, exhaust system. Drivetrain: Manual and automatic transmissions, clutch, differentials, drive shafts, Q4 all-wheel-drive system. Chassis: Suspension (front and rear), steering system, brake system (including ABS), wheel and tire specifications. Electrical: Complete wiring diagrams, ignition system, lighting, instrumentation, power distribution, electronic control units (ECUs), audio system, air conditioning. Body: Body structure, exterior panels, doors, windows, interior trim, climate control system, safety restraints (airbags, seatbelts). Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, spark plug replacement, brake fluid flush, coolant replacement, timing belt replacement. Repair: Engine overhaul, transmission rebuild, suspension component replacement, brake caliper overhaul, steering rack repair, electrical component diagnosis and repair, body panel repair. Diagnostics: Troubleshooting guides, diagnostic trouble codes (DTCs), component testing procedures, use of diagnostic tools. Technical Depth Depth: Comprehensive, from basic adjustments to complete vehicle teardown and reassembly, including engine and transmission rebuilds. Diagnostic Capability: Factory-level diagnostic procedures and specifications, enabling professional-grade troubleshooting. 📊 Manual Specifications File Format Searchability: Searchable PDF text allows for quick access to specific information. Printability: Printable pages for easy reference during workshop tasks. Print Quality Diagram Quality: High-quality, clear, and detailed diagrams and illustrations. Binding Type Binding: N/A (Digital Download) Paper Type Paper Quality: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Variant 1 Engine: 1.7L 8v Twin Spark (AR671.03), 2.0L 16v Twin Spark (AR167.05) Variant 2 Engine: 2.5L V6 24v 'Busso' (AR161.04), 3.0L V6 24v 'Busso' (AR161.05) for Q4 Performance 1.7 Ts Power: 115 PS (85 kW; 113 hp) 2.0 Ts Power: 150 PS (110 kW; 148 hp) 2.5 V6 Power: 192 PS (141 kW; 189 hp) 3.0 V6 Q4 Power: 190 PS (140 kW; 187 hp) Fuel System Injection Type: Electronic multi-point fuel injection (MPI) with Bosch Motronic or similar engine management systems. Fuel Type: Unleaded gasoline (Octane rating typically 95 RON or higher) 🔧 Transmission Standard Transmission Type Common: 5-speed manual gearbox Optional Transmission Type Optional: 4-speed automatic (e.g., ZF 4HP18, J-Type) Features Q4 Drivetrain: Permanent all-wheel-drive system with viscous coupling and Torsen center differential for Q4 models. 📐 Dimensions Exterior Length: Approx. 4400 mm (173.2 in) Width: Approx. 1700 mm (66.9 in) Height: Approx. 1420 mm (55.9 in) Weights Curb Weight: Varies by engine and specification, typically 1250-1450 kg (2755-3197 lbs) 🛡️ Safety Features Ratings Euro Ncap Rating: Not directly tested by Euro NCAP in its early format, but generally considered competitive for its era. Active Features Active Safety: Anti-lock Braking System (ABS) often standard or optional, power-assisted steering. Passive Features Passive Safety: Front airbags (driver and passenger), crumple zones, reinforced passenger cell, side-impact protection beams. 💡 Technology Features Infotainment Audio System: Factory-fitted radio/cassette player with speaker systems, often with optional CD player. Aftermarket upgrades common. Driver Assistance ABS: Anti-lock Braking System (ABS) generally available on higher trim levels or as an option. Connectivity Connectivity Features: Limited by modern standards; basic power windows, central locking, and electric mirror controls. 🔧 Maintenance Service Intervals Oil Change Interval: Typically 10,000-15,000 km (6,000-9,000 miles) or 12 months, whichever comes first. Timing Belt Replacement: Crucial for Twin Spark and V6 engines; typically every 60,000 km (37,000 miles) or 3-4 years, depending on engine variant and conditions. Consult manual for exact intervals. Fluid Specifications Engine Oil: Refer to manual for specific viscosity grades (e.g., Selenia 10W-40, 10W-50) depending on engine and climate. Twin Spark often requires specific oil formulations. Coolant: Ethylene glycol-based antifreeze, typically a 50/50 mix with distilled water. Specific Alfa Romeo approved coolant recommended. Brake Fluid: DOT 4 (or DOT 3 if specified by manufacturer for certain systems). Transmission Fluid Manual: GL-4 or GL-5 gear oil (specific viscosity as per manual, e.g., 75W-90). Transmission Fluid Automatic: ATF Dexron-II or Dexron-III, or equivalent as specified by the transmission manufacturer (e.g., ZF). Known Issues Rust Corrosion: Common issue on older vehicles, particularly around wheel arches, sills, and boot lid edges....