Self Study Program 920273 – The Audi 2.5L TFSI Engine EA855 EVO Series

Self Study Program 920273 – The Audi 2.5l TFSI Engine EA855 EVO Series PDF. Audi launched its first five-cylinder engine for the North American market in 1977 with the Audi 5000. These engines have been the staple of the Audi product range ever since and have been used successfully in both production and
racing cars. They have achieved cult status, not least because of their distinctive sound. Even today they offer an emotional driving experience. The five-cylinder era continued until 1998 when a new V6 TFSI engine was introduced.

However, the five-cylinder made a comeback with the introduction of the Audi TT RS. Since 2010, the 2.5 TFSI engine has been voted “International Engine of the Year” in its class for seven consecutive years by an international jury of motorists.

The new 2.5 liter R5 TFSI engine of the EA855 EVO series replaces the previous 2.5 liter R5 TFSI engine and makes its North American debut in the Audi TT RS. There are also plans to use this engine in other models including the Audi RS3.

Learning objectives of this Self-Study Program:

This Self-Study Program describes the design and function of the fourth-generation 2.5l R5 TFSI engine of the EA855 EVO series in the Audi TT RS.

After completing this Self-Study Program you will be able to answer the following questions:

What are the differences between the new engine and its predecessor?

  • Which structural design measures are used to achieve lightweight design?
  • How do the oil supply and engine cooling systems work?
  • What are the special features of the air supply system?
  • How do the new injection process and the engine management system work?


  • Introduction
    • Engine description and special features
    • Specifications
  • Engine mechanicals
    • Cylinder block
    • Timing case (cover for timing chains)
    • Oil pan top and bottom sections
    • Crankshaft drive
    • Pistons and connecting rods
    • Cylinder head
    • Audi valvelift system (AVS)
    • Timing assembly
    • Accessory belt drive
    • Positive crankcase ventilation
  • Oil supply
    • Overview
    • Oil pump
    • Oil filter housing / oil cooler
    • Oil flow
  • Cooling system
    • Overview
    • Innovative Thermal Management (ITM)
    • Sensors in the coolant circulation system
    • Actuators in the coolant circuit
  • Air supply and turbocharging
    • Overview
    • Intake manifold
    • Turbocharging
  • Exhaust system
    • Overview
    • Catalytic converter module
    • Switchable exhaust valves
  • Fuel system
    • Overview
    • Fuel injectors
    • Intermediate Shaft Speed Sensor G265
    • Combustion process
    • Operating modes
  • Engine management
    • System overview
  • Inspection and maintenance
    • Service information and operations
    • Special tools and workshop equipment
  • Appendix
    • Glossary
    • Self-Study programs
  • Knowledge assessment

The eSelf-Study Program (eSSP) teaches a basic understanding of the design and mode of operation of new models, new automotive components or new technologies.

It is not a repair manual! Figures are given for explanatory purposes only and refer to the data valid at the time of preparation of the SSP.
For further information about maintenance and repair work, always refer to the current technical literature.

Language: English
Format: PDF
Pages: 61

Self Study Program 920273 – The Audi 2.5l TFSI Engine EA855 EVO Series

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