🏷️ Basic Information Identification Make: Porsche Model: 928 Years Covered: 1978-1995 Codes Chassis Codes: 928 👋 Introduction Market Position Positioning: Premium Grand Tourer Competitive Analysis Competitors: Ferrari 400 GT, Aston Martin DBS, BMW 6 Series (E24), Jaguar XJ-S Key Features Unique Selling Proposition: Front-engine, rear-wheel-drive transaxle layout, V8 engine, luxurious GT comfort with sports car performance Target Audience Intended Users: Do-it-yourself enthusiasts and experienced mechanics 📋 Manual Details Coverage Areas Primary Coverage: Complete Workshop Service and Repair All Styles Covered: Yes Page Count Estimated Page Count: Hundreds Manual Type Type: Factory Service Repair Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine Service Repair: Included Transmission Service Repair: Included Brake System: Included Wiring Diagrams: Included Electrical System: Included Suspension: Included Periodic Lubrication: Included Steering: Included Cooling System: Included Fuel Injection: Included Fuel System: Included Emission System: Included Heater Air Conditional: Included Engine Control System: Included Chassis Body: Included Restraint System: Included Interior: Included Differential Drive: Included Axle: Included Procedures Included General Maintenance: Included Troubleshooting: Included Repair Procedures: Step-by-step, complete disassembly Diagnostic Procedures: Included, especially for electrical systems Technical Depth Depth: Comprehensive, from basic maintenance to complete rebuilds Detail Level: Hundreds of pages with detailed substeps, notes, cautions, and warnings Visual Aids: Hundreds of photos, illustrations, drawings, and enlarged insets 📊 Manual Specifications File Format Format: PDF Compatibility: PC-based Windows OS and Mac Print Quality Printability: Printable without restriction Printing Options: Print entire manual or specific pages Binding Type Binding: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) Requirements Software Requirements: Adobe PDF Reader ⚙️ Engine Specifications Primary Engine Engine Type: V8 (various displacements over model run) Displacement Early: 4.5 Liters (4474 cc) Displacement Later: 5.0 Liters (4969 cc) and 5.4 Liters (5306 cc) Performance Horsepower Range: Approx. 231 hp (early) to 326 hp (later S4/GT/GTS variants) Torque Range: Approx. 254 lb-ft (early) to 383 lb-ft (later S4/GT/GTS variants) Fuel System Fuel Delivery Early: Bosch K-Jetronic mechanical fuel injection Fuel Delivery Later: Bosch LH-Jetronic electronic fuel injection Engine Management ECU Type: Varies by model year and emission standards (e.g., Motronic) 🔧 Transmission Standard Transmission Type Early: 5-speed Manual (Type G50) Optional Transmission Type Auto: 3-speed Automatic (early), 4-speed Automatic (later - Type 090) Features Transaxle Layout: Rear transaxle (engine front, transmission rear) 📐 Dimensions Exterior Length: Approx. 4650-4765 mm (varies by year/trim) Width: Approx. 1790-1810 mm (varies by year/trim) Height: Approx. 1280-1300 mm (varies by year/trim) Weights Curb Weight: Approx. 1540-1720 kg (varies by year/trim) 🛡️ Safety Features Ratings Crash Test Data: Limited official ratings for early models, but designed with safety in mind for its era. Active Features ABS: Standard on later models (S4 onwards) Passive Features Airbags: Driver airbag became standard in later years. Seatbelts: 3-point front seatbelts with pretensioners. 💡 Technology Features Infotainment Audio System: Integrated Blaupunkt or Porsche branded stereo systems, often with cassette players. Climate Control: Early models featured manual HVAC, later models had automatic climate control. Driver Assistance Cruise Control: Standard on most models. Connectivity Early Features: Focus on mechanical and analog systems, limited electronic connectivity by modern standards. 🔧 Maintenance Service Intervals Oil Change Interval: Typically 5,000-7,500 miles or annually, depending on driving conditions. Timing Belt Replacement: Crucial! Every 30,000-60,000 miles or 3-5 years, depending on model year and material. Interference engine! Fluid Specifications Engine Oil Type Early: API SG or SH, SAE 20W-50 or 15W-50 (check specific year). Engine Oil Type Later: API SJ/SL, SAE 0W-40 or 5W-40 recommended (check specific year). Coolant Type: Glysantin G05 or equivalent (phosphate-free). Brake Fluid Type: DOT 4 Transmission Fluid Auto: Dexron III/Mercon or equivalent. Differential Fluid: SAE 75W-90 GL-5 Known Issues Fuel Line Condition: Degradation of original rubber fuel lines is common, requiring replacement. Coolant Tube Leaks: Rear coolant tubes and 'o-rings' can degrade, leading to leaks. Timing Belt Failure: Critical maintenance item; failure is catastrophic due to interference design. Electrical Gremlins: Aging wiring and connectors can cause intermittent issues, particularly with early models. Heater Control Panel: Faulty climate control units or vacuum actuators. 📚 Vehicle History Brand Heritage Heritage Connection: Porsche's first V8 production car, designed as a successor to the 911 in some markets. Model Evolution Key Evolutionary Steps: Introduction of 4.7L, 5.0L, 5.4L engines; S, CS, GT, GTS, Turbo S variants; major styling and mechanical updates (e.g., S4 facelift). Production Production Period: 1978-1995 Manufacturing Location: Zuffenhausen, Germany 🏆 Awards & Recognition Recognitions Industry Acclaim: Often praised for its innovative design, GT comfort, and handling balance for its era.