🏷️ Basic Information Identification Make: Porsche Model: 928 Year Range: 1977-1995 👋 Introduction Market Position Market Position: The Porsche 928 was a groundbreaking luxury grand tourer, a departure from Porsche's traditional rear-engined sports cars. It was positioned as a comfortable, high-performance, front-engined, rear-wheel-drive coupe designed for long-distance touring with sports car handling. Competitive Analysis Competitive Analysis: Competed with other luxury GT cars of its era, such as the BMW 6 Series, Mercedes-Benz SLC/SL, and Aston Martin models. Its unique transaxle layout and V8 engine set it apart. Key Features Key Features: Front-engine V8, rear transaxle for optimal weight distribution, advanced (for its time) suspension, aerodynamic styling, luxurious interior, and a focus on driver comfort and high-speed stability. Design Philosophy Design Philosophy: To create a comfortable, technologically advanced, front-engined GT that could potentially supersede the 911 in Porsche's lineup, emphasizing a refined driving experience and touring capability. 📋 Manual Details Coverage Coverage Areas: General/Technical Information, Diagnostics, Engine, Fuel & Exhaust, Transmission, Chassis, Body, Body Exterior, Body Interior, Air Conditioning, Electrical Info, Diagnosis, and more. Page Count Estimated Page Count: Likely several thousand pages given the span of years and complexity. Manual Type Manual Type: Workshop Manual / Repair Manual / Service Manual Language Language: English Format Format: PDF (Digital Download) File Size Estimated File Size: Highly variable, but likely several hundred megabytes due to the extensive detail and diagrams. 📖 Manual Coverage Systems Covered Systems Covered: Engine (including variations like the M28 series V8), Fuel System (CIS and later injection), Exhaust System, Cooling System, Lubrication System, Ignition System, Clutch, Manual Transmission, Automatic Transmission (e.g., 3-speed, 4-speed automatic), Driveshafts, Suspension (front and rear transaxle), Steering System, Braking System (including ABS in later models), Wheels and Tires, Chassis Frame, Body Structure, Exterior Body Panels, Interior Trim and Upholstery, HVAC System (Air Conditioning and Heating), Electrical System (wiring diagrams, components, fuses, relays), Lighting System, Instrumentation, Diagnostic procedures, Emission Control Systems. Procedures Included Procedures Included: Routine maintenance (oil changes, filter replacements, tune-ups), detailed diagnostic procedures for all systems, component removal and installation, overhaul procedures for engine and transmission, brake system repairs, suspension and steering alignment and repair, bodywork and collision repair guidance, HVAC system servicing, electrical system troubleshooting and repair, fuel system diagnosis and repair, emission control system servicing, torque specifications for all fasteners, special tool recommendations, wiring schematics, exploded views of components. Technical Depth Technical Depth: Comprehensive, covering everything from basic preventative maintenance and fluid checks to in-depth engine and transmission rebuilds, complex electrical diagnostics, and body panel repair. Troubleshooting Troubleshooting Sections: Dedicated diagnostic sections for all major systems, including symptom-based troubleshooting guides and flowcharts. Special Tools Special Tool References: Manual will list specific Porsche special tools required for certain procedures (e.g., flywheel locking tool, fuel pressure gauge, timing belt tensioner tools). 📊 Manual Specifications File Characteristics File Format: PDF Print Quality: Digital, quality dependent on original source; typically high for factory manuals. Binding Type: N/A (Digital Download) Paper Type: N/A (Digital Download) Software Compatibility: Windows/Mac Delivery Download Speed: Instant Download Shipping: No Shipping Cost Scope Manual Completeness: Complete workshop/repair/service manual covering the entire vehicle model range from 1977 to 1995. ⚙️ Engine Specifications Primary Engine Primary Engine M28: Porsche M28 V8 engine series. Initial models featured a 4.5L SOHC V8 with Bosch K-Jetronic fuel injection. Later models saw displacement increases to 4.7L, 5.0L (including S and S2 variants), and finally 5.4L for the GTS model. Performance Initial Horsepower: Approximately 219 hp (163 kW) for early US market models. Later Horsepower: Up to 326 hp (243 kW) for the 928 GTS. Fuel System Fuel System Early: Bosch CIS (Continuous Injection System) - Mechanical Fuel Injection. Fuel System Late: Bosch LH-Jetronic Electronic Fuel Injection in later models. Engine Variant Codes Engine Variant Codes: M28/01-M28/22 (examples of V8 engine codes across the model range). Engine Layout Engine Layout: V8, Front-mounted, Longitudinal Valve Train Valve Train Early: Single Overhead Camshaft (SOHC) per bank. Valve Train Late: Dual Overhead Camshaft (DOHC) per bank on 32-valve models (928 S4, GT, GTS). 🔧 Transmission Standard Standard Transmission: 5-speed Manual Transaxle (Type G99/xx for later models). Optional Optional Transmission: 3-speed Automatic (early models), 4-speed Automatic (later models, e.g., 090/098) Features Transaxle Layout: Rear transaxle layout, combining gearbox and differential for improved weight distribution (50/50 ideal). Fluid Specifications Manual Transmission Fluid: Typically SAE 75W-90 or SAE 80W-90 GL-4 or GL-5 gear oil, specific grade and capacity detailed in manual. Automatic Transmission Fluid: Dexron III or equivalent specification automatic transmission fluid. Gear Ratios Gear Ratios Manual: Varies by model year and transmission type (e.g., 5-speed transaxle). Specific ratios provided in manual. 📐 Dimensions Exterior Wheelbase Early: 2593 mm (102.1 in) Wheelbase Late: 2593 mm (102.1 in) - consistent across most years. Weights Curb Weight Early: Approximately 1530-1650 kg (3370-3640 lb) depending on equipment. Curb Weight Late: Approximately 1550-1700 kg (3420-3750 lb) for later...