Audi Audi TT 1998-2006

Audi Audi TT 1998-2006 1.8L Engine Specifications

Detailed technical specifications and documentation for the 1.8L turbocharged engine in the 1998-2006 Audi TT. Includes performance metrics, system details, and maintenance guidelines.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the 1.8l-engine specifications for the 1998-2006 Audi TT, including key features, measurements, and technical details

How to Use

Use the search function to locate specific 1.8l-engine specifications by entering keywords such as 'turbocharger', 'compression ratio', or 'fuel system'.

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

Key Specifications

Displacement

1.8 liters (1781 cc)

Power Output

180 hp (134 kW) at 5500 rpm

Torque

173 lb-ft (235 Nm) at 1950-4700 rpm

Compression Ratio

9.5:1

Oil Capacity

4.3 liters (4.5 quarts)

Available Specifications

Engine Design and Configuration

Details about the engine's design, layout, and key components

Engine Layout

Inline 4-cylinder configuration
Turbocharged and intercooled design
DOHC (Dual Overhead Camshaft) with 20 valves
Aluminum alloy cylinder head and block
Bore: 81.0 mm, Stroke: 86.4 mm

Fuel System

Sequential multi-point fuel injection
Fuel pressure: 3.8 bar (55 psi)
Electronic throttle control
Optimized for 95 RON unleaded fuel
Fuel tank capacity: 55 liters (14.5 gallons)

Note: Higher octane fuel may improve performance but is not required.

Performance Specifications

Technical details about the engine's performance and output

Power and Torque

Maximum power output: 180 hp (134 kW) at 5500 rpm
Maximum torque: 173 lb-ft (235 Nm) at 1950-4700 rpm
Redline: 6500 rpm
Compression ratio: 9.5:1
Turbo boost pressure: 0.8 bar (11.6 psi)

Emission Standards

Complies with Euro 3 emission standards
Equipped with dual catalytic converters
OBD-II (On-Board Diagnostics) compliant
Exhaust gas recirculation (EGR) system
Lambda control for optimized air-fuel ratio

Cooling and Lubrication

Information about the engine's cooling and lubrication systems

Cooling System

Liquid-cooled with electric radiator fan
Coolant capacity: 7.0 liters (1.85 gallons)
Thermostat opening temperature: 87°C (189°F)
Radiator pressure cap rating: 1.4 bar (20 psi)
Coolant mixture: 50% water, 50% antifreeze

Lubrication System

Wet sump lubrication system
Oil capacity: 4.3 liters (4.5 quarts) with filter
Recommended oil grade: 5W-40 synthetic
Oil pressure: 2.0-4.5 bar (29-65 psi) at 2000 rpm
Oil change interval: 15,000 km (9,320 miles) or 12 months

Note: Use only VW 502 00 or ACEA A3/B4 compliant oil.

Electrical and Ignition System

Details about the engine's electrical and ignition components

Ignition System

Direct ignition system with individual coils
Spark plug gap: 0.8 mm (0.031 in)
Ignition timing: 10° BTDC at idle
Recommended spark plugs: NGK BKR6EKU
Ignition coil primary resistance: 0.5-1.0 ohms

Charging System

Alternator output: 120 A
Battery capacity: 72 Ah
Voltage regulator integrated into alternator
Battery cold cranking amps (CCA): 640 A
Recommended battery type: AGM (Absorbent Glass Mat)

Search Specifications

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Engine Specifications

General information

Engine Code

Displacement: 1.8 liters (1781 cc)

Configuration: Inline 4-cylinder

Aspiration

Turbocharged
Intercooled

Fuel System: Multi-point fuel injection

Manufacturer: Audi AG

Production Years: 1998-2006

Performance Specifications

Power Output: Base Model: 150 hp @ 5800 rpm
High Output: 180 hp @ 5500 rpm
225 Model: 225 hp @ 5900 rpm

Torque: Base Model: 155 lb-ft @ 2100-5000 rpm
High Output: 173 lb-ft @ 1950-4700 rpm
225 Model: 207 lb-ft @ 2200-5500 rpm

Compression Ratio: 9.5:1

Redline: 6500 rpm

Engine Block

Material: Cast iron

Bore: 81.0 mm

Stroke: 86.4 mm

Cylinder Spacing: 88 mm

Main Bearing Caps: 4-bolt design

Cylinder Head

Material: Aluminum alloy

Valvetrain: DOHC, 20 valves (5 valves per cylinder)

Camshaft Drive: Timing belt

Valve Clearance: Hydraulic lifters (self-adjusting)

Turbocharger System

Turbo Model: KKK K03 (base model), K04 (225 model)

Boost Pressure: Base Model: 0.5 bar (7.25 psi)
225 Model: 0.8 bar (11.6 psi)

intercooler Type: Air-to-air

Wastegate Control: Integrated into turbocharger

Fuel And Ignition

Fuel Type: Premium unleaded (91+ octane)

injector Flow Rate: 280 cc/min

Ignition System: Coil-on-plug

Spark Plug Gap: 0.028-0.032 in (0.7-0.8 mm)

Ignition Timing: Adjustable via ECU

Lubrication System

Oil Capacity: 4.3 liters (with filter)

Oil Type: VW 502 00 / 505 00 specification

Oil Pressure: Idle: 1.0-1.5 bar (14.5-21.7 psi)
Operating: 3.0-4.5 bar (43.5-65.3 psi)

Oil Filter Part Number: 06A 115 561 B

Cooling System

Coolant Capacity: 7.0 liters

Thermostat Opening Temperature: 87°C (189°F)

Radiator Cap Pressure: 1.4 bar (20.3 psi)

Water Pump Type: Mechanical, belt-driven

Maintenance Specifications

Timing Belt Interval: 60,000 miles or 5 years

Spark Plug Replacement interval: 40,000 miles

Oil Change interval: 5,000-7,500 miles or 6 months

Coolant Flush interval: 60,000 miles or 5 years

Diagnostic Specifications

Obd2 Compliance: OBD-II compliant

Common Fault Codes

P0300 (Random misfire)
P0299 (Underboost)
P0171 (System too lean)

Idle Speed: 750-850 rpm

Fuel Trim Range: -10% to +10%

Service Information Service

Detailed service requirements and schedules for the 1.8L engine

5000-7500

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

Use only VW 502 00 / 505 00 specification oil

40000

Replace spark plugs
Inspect ignition coils
Check turbocharger system for leaks

Use OEM or equivalent spark plugs

60000

Replace timing belt and tensioner
Replace water pump
Flush and replace coolant

Timing belt failure can cause severe engine damage

Common Questions

Find answers to common questions about torque specifications

What is the horsepower output of the 1.8L engine in the 1998-2006 Audi TT?

The 1.8L turbocharged inline-4 engine in the Audi TT produces 180 horsepower at 5,500 rpm for the base model and 225 horsepower at 5,900 rpm for the Quattro Sport version.

What is the torque specification for the 1.8L engine?

The 1.8L engine generates 173 lb-ft of torque at 1,950 rpm for the 180 hp variant and 207 lb-ft of torque at 2,200 rpm for the 225 hp variant.

What type of fuel system does the 1.8L engine use?

The 1.8L engine utilizes a multi-point fuel injection (MPFI) system, which ensures precise fuel delivery and optimal combustion efficiency.

What is the recommended oil type and capacity for the 1.8L engine?

The 1.8L engine requires fully synthetic 5W-40 oil with a capacity of 4.5 liters (4.75 quarts) for an oil change, including the oil filter.

What is the compression ratio of the 1.8L engine?

The compression ratio of the 1.8L engine is 9.5:1, which is optimized for turbocharged performance and fuel efficiency.

What is the recommended service interval for the timing belt on the 1.8L engine?

The timing belt should be replaced every 60,000 miles or 5 years, whichever comes first, to prevent potential engine damage due to belt failure.

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 TT 1.8L Engine Service Manual

Coming Soon

Official service manual detailing maintenance procedures, torque specifications, and troubleshooting for the 1.8L engine.

Turbocharger Maintenance Guide

Coming Soon

Comprehensive guide on maintaining and troubleshooting the turbocharger system in the 1.8L engine.

Timing Belt Replacement Tutorial

Coming Soon

Step-by-step instructions for replacing the timing belt on the 1.8L engine, including tools and safety precautions.

1.8L Engine Performance Upgrades

Coming Soon

Technical guide on performance upgrades for the 1.8L engine, including ECU tuning and aftermarket parts.

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Technical Information

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