🏷️ Basic Information Identification Make: Porsche Model: 928 Model Variants: 928, 928S, 928S4 Generation Generation Years: 1978-1995 (first generation, covered 1978-1993) Codes Chassis Codes: 928 (all variants) 👋 Introduction Market Position Market Position: The Porsche 928 was a luxury grand tourer positioned as a flagship model, aimed at a premium market segment seeking performance, comfort, and advanced engineering. Competitive Analysis Primary Competitors: Ferrari 400/412, Aston Martin V8 Vantage, Jaguar XJ-S, Chevrolet Corvette. Key Features Design Philosophy: Front-engine, rear-wheel drive, V8-powered, transaxle layout for optimal weight distribution, advanced aerodynamic design, and a luxurious interior. Manual Purpose: To provide comprehensive service and repair information for mechanical technicians and owners, enabling proper maintenance and repair of the Porsche 928 series. 📋 Manual Details Coverage Areas Covered Years: 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993 Covered Models: Porsche 928, Porsche 928S, Porsche 928S4 Page Count Page Count Estimate: Extensive (typical for Porsche workshop manuals, precise count not provided but implied by comprehensive coverage) Manual Type Manual Type: Workshop Service Repair Manual Language Language: English Format File Format: PDF 📖 Manual Coverage Systems Covered Powertrain: Engine (tune-ups, disassembly, reassembly, diagnosis), Fuel System, Ignition System, Lubrication System, Exhaust System Drivetrain: Transmission (repair, overhaul, disassembly, assembly) Chassis: Brakes, Steering, Suspension, Wheels, Tires Electrical: Electrical System (wiring diagrams, component testing, diagnosis) Body: Bodywork (repair, adjustment, panels, doors, windows) Procedures Included Maintenance: Routine maintenance, scheduled servicing, tune-ups Repair: Diagnostic procedures, troubleshooting guides, component repair, system overhauls Installation: Removal and installation procedures for various components and assemblies Technical Depth Depth: Comprehensive, suitable for professional technicians and experienced DIY enthusiasts; covers from basic maintenance to complete engine and transmission disassembly and rebuilds. Special Emphasis: Special aspects of the product, proprietary component instructions, emphasis on WARNING, CAUTION, and NOTE for critical procedures. 📊 Manual Specifications File Format File Format: PDF Print Quality Printability: Yes Binding Type Binding Type: Digital (PDF - not applicable to physical binding) Paper Type Paper Type: Digital (PDF - not applicable to physical paper type) Delivery Delivery Method: Fast and Free Electronic Delivery via Email ⚙️ Engine Specifications Primary Engine Engine Type: V8 (water-cooled, front-mounted, longitudinal) Displacement 928: 4.5 Liters (4474 cc) Displacement 928S: 4.7 Liters (4664 cc) Displacement 928S4: 5.0 Liters (4957 cc) Performance 928 Horsepower 928: Approx. 240 hp (DIN) Torque 928: Approx. 294 lb-ft (DIN) Performance 928S Horsepower 928S: Approx. 300 hp (DIN) (European spec with higher compression), Approx. 250 hp (US spec) Torque 928S: Approx. 318 lb-ft (DIN) (European spec), Approx. 283 lb-ft (US spec) Performance 928S4 Horsepower 928S4: Approx. 320 hp (DIN) Torque 928S4: Approx. 318 lb-ft (DIN) Fuel System Fuel Delivery: Bosch CIS (Continuous Injection System) on early models, Bosch LH-Jetronic fuel injection on later models (S4). Fuel Type: Unleaded premium gasoline 🔧 Transmission Standard Standard Transmission: 5-speed manual transaxle Optional Optional Transmission: 3-speed automatic transaxle (initially, later models offered a 4-speed automatic, sometimes referred to as 'WLS' or Sport Shift on some variants) Features Transaxle Layout: Rear transaxle design (engine front, transmission rear) for 45/55% front/rear weight distribution. 📐 Dimensions Exterior 928 Length 928: Approx. 4550 mm (179.1 in) Width 928: Approx. 1786 mm (70.3 in) Height 928: Approx. 1280 mm (50.4 in) Weights 928 Curb Weight 928: Approx. 1550-1600 kg (3417-3527 lbs) Weights 928S4 Curb Weight 928S4: Approx. 1650-1700 kg (3638-3748 lbs) 🛡️ Safety Features Ratings Safety Features General: Designed with safety in mind for its era, featuring crumple zones, side impact protection (though not always explicitly rated by modern standards). Active Features Braking System: Four-wheel disc brakes, often with ABS (Anti-lock Braking System) on later models (S4). Passive Features Occupant Protection: Three-point seatbelts, supportive seating, and a robust chassis structure. 💡 Technology Features Infotainment Early Infotainment Early: Analog gauges, basic radio/cassette player, climate control. Infotainment Later Infotainment Later: More advanced Blaupunkt or Porsche branded audio systems, digital climate control on S4. Driver Assistance Driver Assistance Features: ABS (on later models), cruise control. Connectivity Connectivity: Limited by era, primarily audio system connectivity. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 7,500-10,000 miles or 12-18 months, depending on driving conditions. Refer to the manual for specific recommendations. Timing Belt Interval: Critical component, usually replaced every 30,000-50,000 miles or 4-5 years due to the interference engine design. The manual will provide the exact specification. Fluid Specifications Engine Oil Type: Synthetic or semi-synthetic oil, viscosity grade typically SAE 10W-40 or 10W-50, though specific recommendations should be confirmed in the manual. Coolant Type: Porsche-approved coolant (typically a silicate-free long-life coolant), mixed with distilled water. Refer to manual for exact Porsche specification. Brake Fluid Type: DOT 4 or DOT 5.1 brake fluid. Transmission Fluid Manual: Hypoid gear oil, SAE 75W-90 or 80W-90 GL-5 specification. Manual will specify Porsche part number. Transmission Fluid Automatic: Specific ATF (Automatic Transmission Fluid) approved by Porsche for the ZF automatic...