🏷️ Basic Information

Make:

Alfa Romeo

Model:

155

👋 Introduction

Target Audience:

Alfa Romeo 155 owners, DIY enthusiasts, independent repair shops, and automotive technicians.

Value Proposition:

Provides essential, in-depth technical information to reduce repair costs, enhance vehicle maintenance, and improve understanding of the Alfa Romeo 155's systems.

Manual Advantage:

Offers a complete, unified resource covering all aspects of the vehicle, superior to fragmented online resources or incomplete generic manuals.

Completeness:

Covers the 'complete tear down and rebuild', a significant benefit for complex tasks.

Visual Aids:

Contains numerous 'pictures and part diagrams' crucial for identification and assembly.

Technical Data:

Includes vital 'torque specifications', essential for correct assembly and preventing damage.

Usability:

Printable format offers flexibility for use in various environments, from clean offices to greasy workshops.

📋 Manual Details

Manual Type:

Complete Repair Manual / Workshop Manual / Service Manual

Language:

English

Format:

Adobe PDF (Digital Download)

📖 Manual Coverage

Engine:

Full coverage including engine mechanical, lubrication, cooling, fuel injection, ignition, emissions control, and engine management systems for all variants.

Transmission:

Comprehensive coverage for manual and automatic transmissions, including clutch, gearbox, differential, drive shafts, and related components.

Brakes:

Detailed information on hydraulic braking system, ABS, brake pads, discs, calipers, master cylinder, and brake fluid specifications.

Suspension Steering:

Complete guide to front and rear suspension systems (MacPherson struts, multi-link), power steering, steering rack, and wheel alignment procedures.

Electrical Electronics:

Extensive coverage of the vehicle's electrical system, including battery, alternator, starter, wiring diagrams, lighting, instruments, and electronic control units (ECUs).

Body Chassis:

Information on body panels, doors, windows, locks, interior trim, chassis components, rust prevention, and structural repair.

Climate Control:

Detailed procedures for air conditioning, heating, ventilation systems, and related components.

Fuel System:

Includes fuel tank, fuel pump, fuel lines, injectors, and fuel pressure regulations.

Exhaust System:

Coverage of exhaust manifolds, catalytic converters, mufflers, and exhaust pipes.

Maintenance:

Scheduled maintenance, oil changes, filter replacements, fluid checks, belt inspections, and tire rotations.

Diagnostics Troubleshooting:

Step-by-step troubleshooting guides for common and uncommon issues, diagnostic error codes (DTCs), and symptom-based problem resolution.

Engine Overhaul:

Complete teardown and rebuild procedures for engine components, including cylinder heads, pistons, crankshaft, camshafts, and timing systems.

Transmission Repair:

Detailed instructions for transmission disassembly, inspection, repair, and reassembly.

Brake Service:

Procedures for brake pad replacement, rotor resurfacing/replacement, caliper servicing, and brake bleeding.

Suspension Steering Repair:

Replacement of control arms, ball joints, tie rods, shock absorbers, struts, and steering rack overhaul.

Electrical Diagnostics:

Wiring harness repair, component testing, sensor diagnosis, and ECU programming/replacement guidance.

Bodywork Repair:

Guidance on panel alignment, dent repair, rust treatment, glass replacement, and interior trim fitting.

Coverage Level:

Comprehensive. Covers everything from basic routine maintenance to complete engine and transmission rebuilds, advanced electrical diagnostics, and body repair.

Detail Level:

Includes detailed step-by-step instructions, critical torque specifications, exploded view diagrams, and diagnostic flowcharts.

📊 Manual Specifications

File Type:

PDF

Searchability:

Likely text-searchable PDF, allowing for quick information retrieval by keyword.

Printable:

Yes, all pages are printable for convenient use in a workshop environment.

Image Quality:

High-resolution images and diagrams for clear visualization of components and procedures.

Format Description:

Digital Download - No physical binding. Users print pages as needed.

Print Medium:

User-printable on standard paper, allowing for durability in garage conditions.

⚙️ Engine Specifications

Engine Families Covered:

Likely covers the Lampredi '155' series Twin Cam (e.g., 1.8 TS, 2.0 TS) and potentially the Busso V6 engines (e.g., 2.5 V6).

Engine Variants Common:

Alfa Romeo 155 Twin Spark (TS) engines (e.g., 1779cc, 1995cc) with 8 or 16 valves per cylinder, and the 2.5 V6 (12-valve and later 24-valve variants if applicable to the model's production run).

Power Output Typical:

Ranges from approx. 120 HP for early 1.8 TS to over 190 HP for V6 variants, depending on specific engine and market.

Torque Output Typical:

Varies significantly by engine, from around 160 Nm to over 250 Nm.

Fuel Injection:

Bosch Motronic or similar multi-point electronic fuel injection (MPI) systems for TS engines; likely Lucas or Bosch for V6.

Ignition System:

Distributorless ignition system (DIS) with two spark plugs per cylinder for Twin Spark engines; direct ignition for V6.

Valve Train:

Camshaft drive via timing belt for Twin Spark; timing belt for V6 engines. Dual spark plug ignition per cylinder unique to TS engines.

Construction:

Aluminum alloy cylinder heads, cast iron or aluminum engine blocks depending on variant.

🔧 Transmission

Transmission Type Standard:

5-speed Manual Transmission

Transmission Type Optional:

4-speed Automatic Transmission (likely ZF or JATCO sourced, depending on market and engine).

Clutch System:

Hydraulically operated single dry plate clutch.

Final Drive:

Front-wheel drive (FWD) or Permanent All-Wheel Drive (Q4) depending on model variant.

Manual Transmission Fluid:

Typically SAE 75W-90 or 80W-90 API GL-4 or GL-5 gear oil. Specific viscosity and API rating to be confirmed in manual.

Automatic Transmission Fluid:

Likely ATF Dexron-II or Dexron-III specification. Specific type and capacity to be confirmed in manual.

📐 Dimensions

Body Styles:

4-door Sedan

Length:

Approx. 4400 mm (varies slightly by year and spec).

Width:

Approx. 1700 mm.

Height:

Approx. 1420 mm.

Wheelbase:

Approx. 2600 mm.

Curb Weight:

Ranges from approx. 1250 kg for base models to over 1400 kg for V6 and Q4 variants.

Gross Vehicle Weight Rating:

Specified in the manual, typically around 1800-2000 kg.

🛡️ Safety Features

Crash Test Performance:

Specific official Euro NCAP or equivalent ratings for the 155 are not widely documented, but it was designed with safety in mind for its era.

ABS:

Available on many models, particularly higher-spec variants and Q4 versions.

Traction Control:

Available on some Q4 models.

Airbags:

Driver's airbag standard on later models and optional on earlier ones. Passenger airbag became available on later production runs.

Seatbelts:

Three-point seatbelts with pre-tensioners for front occupants.

Chassis Design:

Reinforced safety cell, crumple zones.

💡 Technology Features

Audio System:

Factory fitted radio/cassette or CD players. Upgrades were common. Manual would detail wiring for head unit replacement.

Instrument Cluster:

Features a comprehensive dashboard with tachometer, speedometer, fuel gauge, temperature gauge, and warning lights. Manual details diagnostic indicators.

ABS Availability:

As mentioned under Safety, ABS was a significant technological feature for its time, available on most variants.

Not Applicable:

Connectivity features like Bluetooth or USB were not standard in this era. The manual focuses on core automotive technology.

🔧 Maintenance

Oil Change Interval:

Typically every 10,000-15,000 km or 6-12 months, using synthetic oil. Specific interval in manual.

Timing Belt Replacement:

Crucial for Twin Spark and V6 engines. Intervals typically around 60,000-90,000 km or 5 years. Failure is catastrophic. Manual will specify exact interval and procedure.

Spark Plug Replacement:

For Twin Spark engines (dual plugs per cylinder), replacement is critical for performance. Interval around 40,000-60,000 km. Manual will specify types and torque.

Engine Oil Specification:

Typically fully synthetic SAE 10W-40 or 5W-40, API SL/SM or ACEA A3/B4 compliant. Specific viscosity and API/ACEA rating to be confirmed in manual.

Coolant Specification:

Ethylene glycol based antifreeze/coolant, typically pink or red. Specific type and mixture ratio to be confirmed in manual.

Brake Fluid Specification:

DOT 4 brake fluid. Regular replacement is recommended.

Rust Corrosion:

Common issue for many cars of this era, particularly around wheel arches, sills, and suspension mounting points. The manual will offer guidance on inspection and treatment.

Twin Spark Engine Issues:

Potential for wear in the 'twin spark' ignition system components, leading to misfires and rough running. Correct spark plug selection and replacement is vital. The manual details these procedures.

Busso V6 Engine Issues:

Known for spectacular sound but requires diligent maintenance. Oil leaks from cam covers and oil coolers are not uncommon. Timing belt replacement is paramount. Manual provides detailed procedures for maintenance and repair.

Electrical Gremlins:

As with many Italian cars of the period, some minor electrical issues could arise. The comprehensive wiring diagrams and troubleshooting sections in the manual are invaluable.

📚 Vehicle History

Alfa Romeo Legacy:

Alfa Romeo has a long and storied history of producing sporty, stylish, and driver-focused cars, often with innovative engineering.

155 Development:

The 155 was developed on the Type Four platform shared with Fiat Croma, Lancia Thema, and Saab 9000. It replaced the Alfa Romeo 75 (Milano).

155 Design:

Designed by Pininfarina, it marked a shift towards more modern, aerodynamic styling compared to its predecessor, though its platform roots were controversial among purists.

Motorsport Success:

The 155 achieved significant success in touring car racing, particularly in the DTM (Deutsche Tourenwagen Meisterschaft) with its Q4 all-wheel-drive system and powerful V6 engines, driven by legends like Nicola Larini.

Production Years:

1992-1997

Production Facets:

Produced at the Fiat factory in Pomigliano d'Arco, Italy, after the Alfa Romeo brand was acquired by Fiat.

Major Facelift:

Received a significant facelift in 1995, introducing revised styling, updated engines (including the 24v V6), and improved interior appointments.

🏆 Awards & Recognition

Racing Accolades:

The Alfa Romeo 155 achieved notable success in motorsport, particularly in touring car championships, showcasing its engineering prowess. The manual's inclusion of technical specifications supports understanding of its performance capabilities.