Self Study Program 432 – The Audi 1.4L TFSI Engine

VAG SSP 432. In this Self-Study Programme you will learn about the design and operation of the 1.4l TFSI engine. With the 1.4l TFSI engine, Audi introduces a modern power plant for the entry-level segment. The new engine has been systematically developed according to the so-called “downsizing* concept”. It represents a major step towards the development of more fuel-efficient and cleaner engines. In specific terms, this means that non-charged engines will be replaced by smaller, turbocharged units. The aims of downsizing are, above all, to reduce overall weight, to minimise friction, to improve fuel efficiency, to achieve lower exhaust emissions and, of course, to create a more compact engine that requires less space. This, in turn, has further advantages in terms of the utilisation of space in the vehicle.

The 1.4l TFSI engine was developed by Volkswagen in association with Audi and will be used throughout the Group. The basis for the joint development project was the 1.4l TSI engine with dual charging by Volkswagen.

The new 1.4l TFSI engine will be used on the Audi A3 and A3 Sportback. It is positioned between the 1.6l MPI engine (75 kW) and 1.8l TFSI engine (118 kW). With a maximum power output of 92 kW (125 bhp), peak torque of 200 Nm and exceptional fuel efficiency for an engine of this size, customers can look forward to a powerplant that combines performance and economy. The 1.4l TFSI engine combines with a long-throw 6-speed manual gearbox or the 7-speed twin-clutch gearbox to create a compelling powertrain concept that offers driving enjoyment without any regrets.

The objectives of this Self-Study Programme

Once you have worked your way through this Self-Study Programme, you will be able to answer the following questions:

  • How is the engine designed mechanically?
  • How does the oil supply system work?
  • What are the special features of the air supply system?
  • How does the cooling system work, and to what should attention be paid during servicing?
  • What are the special features of the improved fuel system?
  • How is the exhaust gas turbocharger designed?
  • What are the new features of the engine management system?
  • What are the special points which have to be kept in mind during servicing?


  • Introduction.
  • Engine mechanicals
    • Cylinder block
    • Crankshaft drive
    • Crankcase breather
    • Positive crankcase ventilation system
    • Activated charcoal filter system
    • Cylinder head
    • Ribbed V-belt drive
    • Chain drive
  • Oil circulation system
    • Lubrication system
    • Oil supply
    • Modified oil filter
    • Self-regulating duocentric oil pump
  • Cooling system
    • Dual circuit cooling system
    • Temperature control
    • Thermostat
  • Fuel system
    • Fuel system (overview)
    • System components
    • Control of mixture formation
  • Intake and exhaust system
    • Exhaust gas turbocharger
    • Intake system
    • Charge pressure control
    • Charge air cooling
  • Engine management
    • System overview 1.4l TFSI engine
    • Engine control unit
  • Service
    • Maintenance work
    • Special tools
  • Annex
    • Glossary
    • Test yourself
    • Self-Study Programmes

The Self-Study Programme teaches the design and function of new vehicle models, new automotive components or new technologies.
The Self-Study Programme is not a Repair Manual.
The values given are for illustration purposes only and refer to the software version valid at the time of publication of the SSP.
For information about maintenance and repair work, always refer to the current technical literature.
Terms written in italics or indicated by an asterisk (*) are explained in the glossary at the back of this Self-Study Programme.

Language: English
Format: PDF
Pages: 56

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