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Porsche

Porsche 944 Turbo 1985-1991 Technical Specifications

Porsche 944 Turbo 1985-1991 Technical Specifications

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Vehicle data plateRef 175914
Brand
Porsche
Vehicle
Cars
Models covered
944, 944 Turbo
Years
1985, 1986, 1987, 1988, 1989, 1990, 1991
Format
PDF, searchable, print-ready
Delivery
Instant download after checkout
Language
English

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🏷️ Basic Information
Identification
Make:
Porsche
Model:
944 Turbo
Production Years Covered:
1985, 1986, 1987, 1988, 1989, 1990, 1991
Codes
Model Code:
944 Turbo (often referred to internally and in documentation)
👋 Introduction
Market Position
Category:
Performance Grand Tourer / Sports Car
Target Audience:
Enthusiasts, owners, independent mechanics, technicians specializing in Porsche.
Competitive Analysis
Era Competitors:
Lotus Esprit Turbo, Ferrari 328 GTB, Chevrolet Corvette C4, Nissan 300ZX Twin Turbo, Toyota Supra Turbo.
Key Features
Performance Focus:
Emphasis on turbocharged performance and handling derived from motorsport heritage.
Design Philosophy:
Transaxle layout for balanced weight distribution, robust engineering, driver-focused cockpit.
📋 Manual Details
Coverage Areas
Vehicle Coverage:
Porsche 944 Turbo models from 1985 to 1991
Page Count
Estimated Pages:
Hundreds to thousands (printable at great quality)
Manual Type
Type:
Technical Specifications / Service Manual
Language
Language:
English
Format
File Format:
PDF
Delivery Method:
Instant Download
Software Requirements:
Adobe PDF Reader, WinZip (for larger files)
📖 Manual Coverage
Systems Covered
Engine:
Detailed specifications, maintenance, diagnostics for the M44.50/M44.51 2.5L inline-4 turbo engine.
Fuel System:
Fuel injection system (Bosch Motronic), fuel pump, injectors, fuel pressure regulator specifications.
Ignition System:
Ignition timing, spark plugs, coil specifications, distributor (if applicable).
Cooling System:
Radiator, fan, thermostat, coolant specifications, capacities, pressure testing.
Lubrication System:
Oil type, viscosity, capacity, oil filter part numbers, oil cooler.
Transmission:
Manual transmission (G30/G30-20) specifications, clutch, shift linkage, fluid type and capacity.
Drivetrain:
Rear-wheel drive, limited-slip differential (LSD) specifications and service.
Suspension:
Front and rear suspension geometry, component specifications, alignment data, shock absorber/strut information.
Brakes:
Front and rear brake system specifications, disc sizes, pad types, hydraulic system details, ABS (if equipped).
Steering:
Power steering system specifications, fluid type, steering rack and linkage.
Electrical System:
Wiring diagrams, fuse box layout, component testing, battery, alternator, starter motor specifications.
Body And Chassis:
Body dimensions, chassis construction, door/hood/trunk mechanisms, aerodynamics.
HVAC:
Air conditioning and heater system operation, controls, components.
Procedures Included
Maintenance:
Oil changes, filter replacements, fluid checks and top-offs, spark plug replacement, belt inspection/replacement.
Troubleshooting:
Diagnostic procedures for common issues related to engine, fuel, ignition, electrical systems.
Repair:
Detailed instructions for component removal, installation, and repair across various systems.
Adjustments:
Engine idle speed, throttle linkage, parking brake adjustment.
Torque Specifications:
Torque values for critical fasteners across all major components.
Technical Depth
Depth:
Comprehensive technical data, mirroring original manufacturer specifications.
Diagnostic Level:
Advanced diagnostics and troubleshooting for complex issues.
Rebuild Procedures:
Likely includes specifications and guidance for major component overhauls (engine, transmission, differential).
📊 Manual Specifications
File Format
Quality:
High quality, printable pages
Searchability:
PDF format typically allows for text searching if OCR is applied.
Print Quality
Printability:
Designed to be printable at great quality.
Binding Type
Binding:
N/A (Digital Format)
Paper Type
Paper Type:
N/A (Digital Format)
⚙️ Engine Specifications
Primary Engine
Engine Code:
M44.50 (1985-1987), M44.51 (1988-1991)
Configuration:
Inline 4-cylinder, DOHC, 16 valves
Displacement:
2.5 Liters (2479 cc)
Bore X Stroke:
104.0 mm x 72.7 mm
Compression Ratio:
8.5:1
Boost Pressure:
1.0 bar (14.5 psi) nominal (with overboost function on some models)
Performance
Horsepower:
217 hp (162 kW) @ 6000 rpm (US spec)
Torque:
245 lb-ft (332 Nm) @ 3500 rpm (US spec)
Fuel System
Fuel Delivery:
Bosch LE-Jetronic fuel injection with turbocharging
Recommended Fuel:
Premium Unleaded (91 Octane or higher)
Fuel Pump Type:
In-tank electric fuel pump
🔧 Transmission
Standard
Type:
5-speed manual transaxle (G30/G30-20)
Optional
Type:
None (944 Turbo was exclusively manual)
Features
Gear Ratios:
Specific gear ratios for each gear, reverse, and final drive (detailed in manual).
Fluid Type:
Hypoid gear oil, SAE 75W/90 or 80W/90 (API GL-4 or GL-5)
Clutch:
Single dry plate, hydraulic actuation
📐 Dimensions
Exterior
Length:
4206 mm (165.6 in)
Width:
1735 mm (68.3 in)
Height:
1275 mm (50.2 in)
Wheelbase:
2499 mm (98.4 in)
Front Track:
1458 mm (57.4 in)
Rear Track:
1432 mm (56.4 in)
Weights
Curb Weight:
Approximately 1360 kg (2998 lbs)
Gross Weight Rating:
Not prominently specified, but typical for class.
Weight Distribution:
Close to 50/50 due to transaxle layout.
Towing Capacity:
Not applicable or recommended for this vehicle type.
Cargo
Cargo Volume:
Rear hatchback storage, plus front 'frunk' storage.
🛡️ Safety Features
Ratings
Crash Test Results:
No formal ratings like modern NHTSA/IIHS due to era, but designed with robust safety cage.
Active Features
ABS:
Anti-lock Braking System (ABS) available on some models and years.
Passive Features
Airbags:
Driver airbag standard from 1987 onwards (check specific year).
Seat Belts:
Three-point seatbelts with pretensioners.
Structural:
Reinforced A-pillars, impact-absorbing foam in doors, strong chassis structure.
Lighting:
Halogen headlights, integrated fog lamps (often optional/standard depending on market).
💡 Technology Features
Infotainment
Audio System:
Factory Blaupunkt or Porsche branded audio systems, often with cassette player; potential for upgrades.
Driver Assistance
ABS:
As mentioned, ABS was an option on later models.
Cruise Control:
Available as an option on many models.
Connectivity
Connectivity Features:
None in the modern sense; primarily focused on core vehicle operation.
Instrumentation
Cluster:
Comprehensive analog gauges including tachometer, speedometer, oil pressure, oil temperature, boost gauge, fuel level, voltage.
🔧 Maintenance
Service Intervals
Oil Change Interval:
Typically every 5,000 - 7,500 miles or annually (refer to manual for precise interval).
Timing Belt Replacement:
Crucial service; typically every 30,000 - 50,000 miles or 3-5 years due to interference engine design. (Specific interval in manual).
Spark Plug Replacement:
Every 15,000 - 30,000 miles, depending on plug type used.
Fluid Specifications
Engine Oil:
Mobil 1 15W-50 or equivalent synthetic oil (check manual for exact API and viscosity ratings).
Coolant:
Porsche approved ethylene glycol coolant (e.g., G40 specified for modern Porsches, but older spec for 944 Turbo would be specified).
Brake Fluid:
DOT 4 or DOT 5.1 brake fluid.
Power Steering Fluid:
Porsche Type 265 or equivalent ATF.
Known Issues
Common Problems:
Timing belt failure (critical), fuel pressure regulator issues, vacuum leaks leading to boost problems, aging rubber components (hoses, mounts), electronics issues.
Turbocharger Maintenance:
Proper cool-down procedures are vital to turbocharger longevity; oil changes are critical.
Maintenance Chart
Chart Availability:
The manual includes a maintenance chart detailing tasks by mileage/time intervals.
📚 Vehicle History
Brand Heritage
Brand Focus:
Porsche has a long history of performance car manufacturing, sports car racing, and engineering innovation.
Model Evolution
Predecessor:
Porsche 924 (the 944 Turbo built upon the 924 platform with significant upgrades).
Development:
Developed to offer a more powerful and performance-oriented alternative to the naturally aspirated 944, bridging the gap to the 911.
Updates:
Minor updates and refinements throughout its production run, including engine management and cosmetic changes.
Production
Manufacturing Location:
Stuttgart, Germany
Production Period:
1985-1991
🏆 Awards & Recognition
Recognitions
Performance Reviews:
Consistently praised by automotive press of its era for its balance, performance, and handling characteristics.
Model Standing:
Considered one of the best front-engine, rear-wheel-drive sports cars of the 1980s.

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