Audi Audi S8 1996-2011

Audi Audi S8 1996-2011 4.2L Engine Specifications

Detailed technical specifications and documentation for the 4.2L V8 engine in the 1996-2011 Audi S8. Includes performance metrics, maintenance guidelines, and component-specific details.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the 4.2l-engine specifications for the 1996-2011 Audi S8, including key features, measurements, and technical details

How to Use

Use the search function to locate specific 4.2l-engine specifications by entering keywords such as 'torque', 'horsepower', or 'compression ratio'.

Navigate through the documentation sections using the table of contents or by scrolling through the major sections and subsections.

Key Specifications

Displacement

4.2 liters (4172 cc)

Power Output

340 hp (250 kW) at 7000 rpm

Torque

410 Nm (302 lb-ft) at 3500 rpm

Compression Ratio

11.0:1

Fuel Efficiency

12.5 L/100 km (combined)

Available Specifications

Engine Design and Architecture

Detailed information about the design, layout, and architecture of the 4.2l V8 engine used in the Audi S8.

Engine Configuration

V8 configuration with 90-degree bank angle
Aluminum alloy block and cylinder heads
DOHC (Dual Overhead Camshaft) design
32-valve setup with 4 valves per cylinder
Chain-driven camshafts for durability

Displacement and Dimensions

Total displacement: 4.2 liters (4172 cc)
Bore: 84.5 mm
Stroke: 93.0 mm
Compression ratio: 11.0:1
Engine weight: ~190 kg (dry)

Note: The lightweight aluminum construction contributes to improved performance and fuel efficiency.

Performance Specifications

Technical details about the power output, torque, and performance characteristics of the 4.2l engine.

Power and Torque

Maximum power output: 340 hp (250 kW) at 7000 rpm
Peak torque: 410 Nm (302 lb-ft) at 3500 rpm
Redline: 7200 rpm
Fuel delivery: Sequential multi-port fuel injection
Throttle system: Drive-by-wire electronic throttle

Performance Metrics

0-100 km/h (0-62 mph) acceleration: 5.6 seconds
Top speed: 250 km/h (electronically limited)
Fuel efficiency: 12.5 L/100 km (combined)
Emissions: Euro 4 compliant

Note: Performance figures may vary slightly depending on model year and specific configuration.

Cooling and Lubrication Systems

Details about the cooling and lubrication systems designed to maintain optimal engine performance and longevity.

Cooling System

Liquid-cooled with a high-capacity radiator
Electric cooling fan with variable speed control
Coolant capacity: 12.5 liters
Thermostat opening temperature: 87°C

Lubrication System

Wet sump oil system with a capacity of 8.0 liters
Oil pressure: 3.5-4.5 bar at operating temperature
Oil filter type: Cartridge-style
Recommended oil grade: 5W-40 synthetic

Note: Regular oil changes are critical to maintaining engine performance and longevity.

Ignition and Fuel Systems

Technical specifications for the ignition and fuel delivery systems of the 4.2l engine.

Ignition System

Direct ignition system with individual coil packs
Spark plug gap: 0.8 mm
Ignition timing: Fully electronic with adaptive control
Recommended spark plugs: NGK BKR6EKUB

Fuel System

Fuel tank capacity: 80 liters
Fuel pump pressure: 3.8 bar
Fuel injector flow rate: 280 cc/min
Recommended fuel: Premium unleaded (95 RON or higher)

Note: Using lower octane fuel may result in reduced performance and efficiency.

Search Specifications

Search by specification name, value, or description

Engine Specifications

General information

Engine Code: ABZ

Displacement: 4.2L (4172 cc)

Configuration: V8

Cylinder Bore: 84.5 mm

Piston Stroke: 93.0 mm

Compression Ratio: 11.0:1

Engine Orientation: Longitudinal

Fuel System: Multi-point fuel injection

Performance

Max Power: 340 hp @ 7000 rpm

Max Torque: 410 Nm @ 3500 rpm

Redline: 7200 rpm

Fuel Type: Premium unleaded (95 RON)

Emission Standard: EURO 4

Engine Block

Material: Aluminum alloy

Cylinder Liners: Cast iron

Main Bearing Caps: Cast iron

Part Number: 077 103 101 A

Cylinder Head

Material: Aluminum alloy

Valves Per Cylinder: 5

intake Valve Diameter: 34.0 mm

Exhaust Valve Diameter: 30.0 mm

Part Number: 077 103 373 B

Crankshaft

Material: Forged steel

Main Journal Diameter: 60.0 mm

Rod Journal Diameter: 50.0 mm

Part Number: 077 105 101 C

Pistons And Connecting Rods

Piston Material: Aluminum alloy

Piston Diameter: 84.45 mm

Connecting Rod Length: 144.0 mm

Connecting Rod Material: Forged steel

Part Number Piston: 077 107 065 A

Part Number Connecting Rod: 077 105 421 B

Lubrication System

Oil Capacity: 7.5 liters

Oil Pressure: 3.0-4.5 bar @ 2000 rpm

Oil Type: 5W-40 synthetic

Oil Filter Part Number: 068 115 561 B

Cooling System

Coolant Capacity: 12.0 liters

Thermostat Opening Temperature: 87°C

Radiator Part Number: 077 121 253 C

Water Pump Part Number: 077 121 010 D

Ignition System

Ignition Type: Distributorless

Spark Plug Gap: 0.8 mm

Spark Plug Torque: 30 Nm

Spark Plug Part Number: 101 000 033 AA

Timing System

Timing Belt Interval: 60,000 miles or 5 years

Timing Belt Part Number: 077 109 119 C

Tensioner Part Number: 077 109 243 A

Idler Pulley Part Number: 077 109 244 B

Diagnostic Specifications

Compression Pressure: 10-12 bar

Compression Variation Limit: 1.0 bar

Idle Speed: 750 ± 50 rpm

Idle CO Emission: 0.3-1.2%

Ignition Timing: 12° BTDC @ idle

Service Information Service

Detailed service requirements and schedules for the 4.2L engine

10,000

Oil and filter change
Inspect timing belt condition
Check coolant level and condition
Inspect spark plugs

Use only Audi-approved synthetic oil and filters.

60,000

Replace timing belt
Replace tensioner and idler pulleys
Inspect water pump
Replace coolant

Timing belt replacement is critical to prevent engine damage.

100,000

120

Replace spark plugs
Inspect ignition coils
Check valve clearance
Replace engine air filter

Valve clearance adjustment may be required if excessive noise is present.

Common Questions

Find answers to common questions about torque specifications

What is the horsepower and torque output of the 4.2L V8 engine in the 1996-2011 Audi S8?

The 4.2L V8 engine in the 1996-2011 Audi S8 produces 340 horsepower at 7,000 RPM and 302 lb-ft of torque at 3,500 RPM. This engine is equipped with a 5-valve-per-cylinder design and features Audi's Variable Valve Timing (VVT) for optimized performance.

What type of fuel system does the 4.2L V8 engine use?

The 4.2L V8 engine in the Audi S8 utilizes a sequential multi-port fuel injection (SFI) system. This system ensures precise fuel delivery to each cylinder, improving fuel efficiency and performance. The engine requires premium unleaded gasoline with an octane rating of 91 or higher.

What is the recommended oil type and capacity for the 4.2L V8 engine?

The 4.2L V8 engine requires fully synthetic motor oil with a viscosity grade of 5W-40 or 0W-40, meeting Audi's VW 502 00 specification. The oil capacity is approximately 8.5 liters (9 quarts) when including the oil filter. Regular oil changes every 10,000 miles or 12 months are recommended.

What is the engine displacement and bore/stroke of the 4.2L V8 engine?

The 4.2L V8 engine has a total displacement of 4,172 cc (4.2 liters). The bore measures 84.5 mm (3.33 inches), and the stroke is 93.0 mm (3.66 inches). This configuration provides a balanced combination of power and smooth operation.

What is the recommended service interval for the timing belt on the 4.2L V8 engine?

The timing belt on the 4.2L V8 engine should be replaced every 75,000 miles or 5 years, whichever comes first. Failure to replace the timing belt on time can result in catastrophic engine damage, as this is an interference engine design.

Factory Service Resources

Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.

Audi S8 4.2L V8 Engine Service Manual

Coming Soon

Official service manual for the 4.2L V8 engine, covering maintenance procedures, torque specifications, and troubleshooting guides.

Timing Belt Replacement Guide for 4.2L V8 Engine

Coming Soon

Step-by-step guide for replacing the timing belt on the 4.2L V8 engine, including tools required and safety precautions.

Audi Genuine Parts Catalog for 4.2L V8 Engine

Coming Soon

Catalog of genuine Audi parts for the 4.2L V8 engine, ensuring compatibility and optimal performance.

Audi S8 4.2L V8 Engine Performance Tuning Guide

Coming Soon

Technical guide for performance tuning the 4.2L V8 engine, including ECU remapping and aftermarket upgrades.

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