1981-1982 Porsche 928/1980-1984 928S dimensions and tolera

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🏷️ Basic Information Identification Make: Porsche Model: 928 Model Variant: 928S Generation First Generation Years: 1978-1986 Specific Generation Covered: First Generation Codes Chassis Code: 928 Engine Code 928: M28.01 (US),...

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Type: Car

Vendor:

Sku: 280005

Tags: 1980 1981 1982 1983 1984 928 928S Car Cars Porsche

Product variants

Description

🏷️ Basic Information

Identification

Make:

Porsche

Model:

Model Variant:

Generation

First Generation Years:

1978-1986

Specific Generation Covered:

First Generation

Codes

Chassis Code:

Engine Code 928:

M28.01 (US), M28.02 (ROW)

Engine Code 928S:

M28.09 (ROW), M28.11 (US)

👋 Introduction

Market Position

Vehicle Segment:

Front-Engine, Rear-Wheel Drive Grand Tourer / Sports Car

Positioning Statement:

The Porsche 928 was a groundbreaking departure for the company, aiming to offer a more comfortable, powerful, and modern GT experience compared to its 911 sibling.

Competitive Analysis

Key Competitors Early Years:

Jaguar XJ-S, BMW 6 Series, Mercedes-Benz SLC/SL

Key Competitors 928S Era:

Ferrari 400/412, Aston Martin V8 Vantage, Mercedes-Benz 500SL

Key Features

Design Philosophy:

Transaxle layout for balanced weight distribution, V8 engine, aerodynamic styling.

Manual Purpose:

Essential for precision work on the vehicle's structural integrity and cosmetic alignment, critical for maintaining Porsche build quality.

📋 Manual Details

Coverage Areas

Covered Models:

1981-1982 Porsche 928, 1980-1984 Porsche 928S

Primary Focus:

Dimensional Specifications and Tolerances

Page Count

Estimated Page Count:

N/A (PDF, dynamically rendered/specific document size)

Manual Type

Manual Type:

Technical Data Document / Dimensional Reference

Language

Language:

English

Format

Format:

📖 Manual Coverage

Systems Covered

Body Dimensions:

Overall Length, Width, Height, Wheelbase, Front/Rear Track

Component Tolerances:

Body Panel Gaps, Door/Hood/Trunk Flushness, Glass Fitment

Chassis Measurements:

Frame and Suspension Mounting Points, Chassis Alignment Reference Points

Interior Dimensions:

Seating Position, Headroom, Legroom, Shoulder Room (as applicable to dimensional data)

Engine Mounting Dimensions:

Engine Bay Clearances, Component Placement Tolerances

Wheel And Tire Dimensions:

Wheel Diameter, Offset, Bolt Pattern, Tire Size Fitment Tolerances

Procedures Included

Body Alignment:

Reference points and measurements for body alignment verification

Panel Replacement Fitment:

Guidelines for ensuring correct fitment of replacement body panels

Quality Control:

Manufacturing and assembly quality control checks related to dimensions

Technical Depth

Depth:

Highly Specific Technical Data for Manufacturing, Restoration, and Quality Assurance

Target Audience:

Restoration Specialists, Bodyshops, Porsche Enthusiasts focused on OEM Accuracy

📊 Manual Specifications

File Format

File Type:

Searchability:

Likely Searchable Text (OCR dependent)

Printability:

Printable

Print Quality

Image Clarity:

Varies by source; typically includes diagrams and tables

Binding Type

Binding:

N/A (Digital PDF)

Paper Type

Paper Type:

N/A (Digital PDF)

⚙️ Engine Specifications

Primary Engine

Engine Type 928:

Engine Displacement 928:

4.5 Liters (4474 cc)

Engine Type 928S:

Engine Displacement 928S Row:

4.7 Liters (4664 cc)

Engine Displacement 928S Us:

4.7 Liters (4664 cc) - Lowered Compression for Unleaded Fuel

Performance

Horsepower 928 Us:

219 hp @ 5500 rpm

Torque 928 Us:

245 lb-ft @ 3600 rpm

Horsepower 928S Row:

306 hp @ 5500 rpm

Torque 928S Row:

302 lb-ft @ 4000 rpm

Horsepower 928S Us:

290 hp @ 5500 rpm

Torque 928S Us:

317 lb-ft @ 4000 rpm

Fuel System

Fuel Delivery 928:

Bosch K-Jetronic Fuel Injection

Fuel Delivery 928S:

Bosch CIS-E (Continuous Injection System - Electronic) Fuel Injection

Fuel Type:

Premium Unleaded Gasoline

🔧 Transmission

Standard

Transmission Type 928:

5-Speed Manual (5-speed dogleg pattern)

Optional

Transmission Type 928 Optional:

3-Speed Automatic (Struffle/ZF)

Transmission Type 928S:

5-Speed Manual (dogleg), 3-Speed Automatic

Features

Transaxle Layout:

Rear-mounted transaxle for optimal weight distribution

Transmission Fluid Specification:

Dexron III (or equivalent for Automatic); GL-4 for Manual (check specific manual for exact specs)

📐 Dimensions

Exterior

Wheelbase:

2500 mm (98.4 in)

Front Track:

1524 mm (60.0 in)

Rear Track:

1532 mm (60.3 in)

Length 928:

4555 mm (179.3 in)

Length 928S:

4663 mm (183.6 in)

Width 928:

1778 mm (70.0 in)

Width 928S:

1784 mm (70.2 in)

Height 928:

1283 mm (50.5 in)

Height 928S:

1280 mm (50.4 in)

Weights

Curb Weight 928 Manual:

Approx. 1560 kg (3439 lbs)

Curb Weight 928S Manual:

Approx. 1580 kg (3483 lbs)

Wheel Bolt Pattern:

5x130 mm

Wheel Offset Example:

+52 mm (Varies by wheel design)

Tire Size Example 928:

215/60VR15 (Front), 225/55VR15 (Rear)

Tire Size Example 928S:

225/50VR16 (Front), 245/45VR16 (Rear)

🛡️ Safety Features

Ratings

Safety Ratings Era:

No standardized NCAP ratings existed for this era; assessed based on design features.

Active Features

Braking System:

Four-wheel disc brakes (Ventilated front)

Anti Lock Brakes:

ABS introduced later in the 928's life cycle, not standard on early 81-84 models.

Passive Features

Body Construction:

Reinforced steel chassis, energy-absorbing crumple zones.

Occupant Restraints:

Three-point seatbelts, optional airbags on later models.

Headlights:

Pop-up halogen headlights for aerodynamic efficiency and improved lighting.

💡 Technology Features

Infotainment

Infotainment System Era:

Basic analog systems typical for the early 1980s.

Radio Features:

AM/FM radio, often with cassette player; some models featured Dolby Noise Reduction.

Driver Assistance

Cruise Control:

Standard on most models.

Air Conditioning:

High-performance A/C system, a key GT feature.

Connectivity

Connectivity Era:

Not applicable in the modern sense.

🔧 Maintenance

Service Intervals

Oil Change Interval:

Every 7,500-10,000 miles or 12 months (recommend checking specific manual)

Timing Belt Replacement:

Crucial; typically every 30,000-60,000 miles or 3-5 years, depending on material and usage. A broken belt causes catastrophic engine damage.

Fluid Specifications

Engine Oil Specification:

SAE 20W-50 or 15W-50 (depending on climate, check manual for precise recommendations)

Coolant Specification:

Porsche approved long-life coolant (ethylene glycol based, typically blue or green)

Brake Fluid Specification:

DOT 4

Known Issues

Common Issue 1:

Timing belt tensioner failure (critical maintenance item).

Common Issue 2:

Fuel distributor leaks (K-Jetronic system).

Common Issue 3:

ABS sensor failure (on models equipped with ABS).

Common Issue 4:

Transaxle shifting issues (especially the dogleg manual).

Common Issue 5:

Electrical gremlins, particularly with aging wiring harnesses and connectors.

📚 Vehicle History

Brand Heritage

Porsche Legacy:

Porsche is renowned for its sports car engineering, racing pedigree, and distinctive design.

Model Evolution

928 Introduction:

Introduced in 1977 for the 1978 model year, as a successor to the 911, though it never fully replaced it.

928S Introduction:

The 928S model debuted in 1979 (for the 1980 model year) with a larger engine and performance enhancements.

Specific Model Years Covered:

1981-1982 (928), 1980-1984 (928S)

Production

Production Location:

Stuttgart-Zuffenhausen, Germany

Production Span 928:

1978-1991

🏆 Awards & Recognition

Recognitions

Early Reception:

Initially praised for its technological innovation, comfort, and performance, though some critics found it less sporting than the 911.

Design Awards:

Won the Car of the Year award in Europe in 1978.

Ratings

Long Term Appreciation:

Considered a modern classic and a significant engineering achievement by Porsche, highly sought after by collectors for its unique characteristics.