🏷️ Basic Information Identification Make: Porsche Model: 928 Model Generation: First Generation (928) Model Years Covered: 1978-1994 Codes Chassis Code: 928 👋 Introduction Market Position Original Market Segment: Luxury Grand Tourer (GT) Competitive Analysis Primary Competitors Era: Ferrari 400/412, Aston Martin V8 Vantage, BMW 6 Series (E24), Mercedes-Benz SEC Coupe (C107/C126) Key Features Unique Selling Proposition: Front-engine, rear-wheel-drive layout with a transaxle, V8 engine, advanced (for its time) technology and luxury. Design Philosophy: Designed to be a modern, comfortable, and powerful GT with a focus on handling and everyday usability. 📋 Manual Details Coverage Areas Manual Title: Porsche 928 1978-1994 Workshop Service Manual Repair Manual Synonyms: Service Manual, Workshop Manual Target Audience: Professional Technicians, DIY Mechanics Page Count Page Count Estimate: Hundreds of pages (specific count not provided, but described as extensive) Manual Type Manual Type: Workshop Service Manual, Repair Manual, Factory Service Manual Language Language: English Format Delivery Method: Instant Download File Format: PDF 📖 Manual Coverage Systems Covered Engine Systems: Engine mechanical, fuel system, ignition system, lubrication, cooling, exhaust, emissions control, engine overhaul Transmission Drivetrain: Manual transmission, automatic transmission, transaxle, clutch, driveshafts, differential, axle components Suspension Steering: Front suspension (transaxle), rear suspension, steering system, power steering, wheel alignment Brakes: Brake system hydraulic, brake components, ABS (if equipped), parking brake Electrical Electronics: Wiring diagrams, battery, alternator, starter, lighting, gauges, instrument cluster, power windows, central locking, HVAC controls, ECU diagnostics Body Chassis: Body panels, doors, hood, trunk, interior trim, glass, bumpers, chassis frame Heating Ventilation Air Conditioning: HVAC system operation, components, and repair Fuel Tank Exhaust: Fuel tank, fuel lines, exhaust system components Procedures Included Maintenance Procedures: Periodic maintenance charts, fluid changes, filter replacements, inspections Repair Procedures: Step-by-step repair instructions for all major vehicle systems Overhaul Procedures: Detailed overhaul procedures for engine, transmission, and other major components Troubleshooting: Diagnostic procedures and troubleshooting guides for common issues Wiring Diagrams: Comprehensive electrical wiring diagrams Technical Depth Technical Depth: Covers routine maintenance to full engine/component overhauls, suitable for professional diagnostics and repairs. 📊 Manual Specifications File Format File Type: PDF Print Quality Printable: Full Printable Zoom Capability: Zoom IN/OUT enabled Binding Type Binding Type Digital: N/A (Digital Download) Paper Type Paper Type Digital: N/A (Digital Download) Requirements Required Software: Adobe PDF Reader, WinRAR Compatibility Operating Systems: All Versions of Windows & Mac ⚙️ Engine Specifications Primary Engine Engine Type Initial: V8 SOHC Engine Displacement Initial: 4.5 Liters (4477 cc) Engine Code Initial: M30/10 (later Z) (Note: Porsche used internal codes, this reflects general understanding) Performance Horsepower Initial: Approx. 231 hp (DIN) / 219 hp (SAE net) Torque Initial: Approx. 281 lb-ft (381 Nm) (DIN) Engine Evolution: Displacement increased over years to 4.7L, 5.0L (928 S4, GT, GTS), with dual overhead cams (DOHC) and variable valve timing (Vario-Cam) on later models. Fuel System Fuel Delivery Initial: Bosch L-Jetronic fuel injection Fuel Type: Unleaded Gasoline (Premium) Cooling System Cooling Type: Water-cooled 🔧 Transmission Standard Standard Transmission Initial: 5-speed Manual Transaxle Optional Optional Transmission Initial: 3-speed Automatic Transaxle (e.g., automatic transmission with torque converter) Features Transaxle Design: Rear-mounted transaxle (engine in front, transmission/differential at rear) for optimized weight distribution (near 50/50). Later Transmission Options: Later models offered updated automatic transmissions with more gears (e.g., 4-speed). 📐 Dimensions Exterior Length: Approx. 4,529 mm (178.3 in) - varies slightly by year/model Width: Approx. 1,785 mm (70.3 in) - varies slightly by year/model Height: Approx. 1,282 mm (50.5 in) - varies slightly by year/model Wheelbase: Approx. 2,400 mm (94.5 in) Weights Curb Weight Estimate: Approx. 1,580 - 1,750 kg (3,483 - 3,858 lbs) - varies by model and equipment 🛡️ Safety Features Ratings Safety Standards Era: Designed to meet evolving safety regulations of the late 1970s and 1980s, including impact standards. Active Features Active Safety Features Early: Four-wheel disc brakes, advanced suspension geometry for stability. Active Safety Features Later: Anti-lock Braking System (ABS) became available on later models (e.g., 928 S4 onwards). Passive Features Passive Safety Features: Reinforced safety cage, impact-absorbing bumpers, padded interior, three-point seatbelts. 💡 Technology Features Infotainment Infotainment Features Early: AM/FM Radio, cassette player, basic climate controls. Infotainment Features Later: Improved sound systems, optional CD players, more advanced climate control (e.g., automatic climate control). Driver Assistance Driver Assistance Features: Cruise control, ABS (later models), limited-slip differential (optional on some models). Connectivity Connectivity Features: N/A (Modern connectivity features like Bluetooth, USB were not present in this era). 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 5,000 - 7,500 miles (8,000 - 12,000 km) or annually, depending on usage and oil type. Check manual for specifics. Major Service Interval: Timing belt replacement is critical, typically every 30,000 - 60,000 miles (48,000 - 96,000 km) or 4-5 years. Refer to manual for exact interval based on year/model. Brake Fluid Flush Interval: Every 2 years Fluid Specifications Engine Oil Type Recommendation: SAE 10W-40 or 15W-50 (synthetic or semi-synthetic recommended...