Self Study Program 607 – Audi 4.0L V8 TFSI engine with biturbo charging

VAG SSP 607. In this Self Study Programme you will learn about the technology of the 4.0l V8 TFSI engine. Audi has a new addition to its family of V engines. The 4.0l V8 TFSI is the fi rst eight-cylinder petrol engine to feature twin exhaust turbocharging and FSI technology. The engine is based on the 4.2l V8 FSI naturally aspirated engine of the Audi A8 ’12. The basic engine derives largely from the 4.2l V8 FSI. To improve fuel economy, the displacement was reduced to 4.2 litres from 4.0 litres.

Another “active” measure for reducing displacement is “cylinder on demand”. This system allows the engine to operate more efficiently at partial load. Another key feature is the HSI (Hot Side Inside) configuration. For this purpose, both exhaust turbochargers are integrated in the inside V of the cylinder block. Even the charge air cooler is housed here. One of the major development challenges was finding space for the engine in the engine bay.

Firstly, the heat generated under the bonnet by the HSI configuration had to be taken into consideration. On the other hand, the statutory regulations concerning pedestrian safety had to be met. The engine has a wide range of power outputs to accommodate various Audi models. Furthermore, other Group brands also use this unit in their models.

The 4.0l V8 TFSI engine employs all the technologies from Audi’s modular efficiency platform. These range from the start-stop system and the recuperation system to a broad array of  frictionreducing  measures. The V8 is assembled at Audi’s Hungarian plant in Györ using high-end technologies such as “plate honing”.

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

  • How is the basic engine designed?
  • How do the engine systems (e.g. air supply, oil supply, cooling) work?
  • What does cylinder on demand do and how is this implemented?
  • What are the special features of the 2nd generation thermal management system?
  • What aspects of the engine management system have changed compared to the 4.2l V8 FSI engine?
  • What are the points to note when servicing the vehicle?


  • Introduction
    • Eight cylinders symbolised by four rings
    • Brief technical description
    • Specifications
  • Engine mechanicals
    • Cylinder block
    • Cranktrain
    • Crankcase ventilation
    • Activated charcoal filter (ACF) system
    • Cylinder heads
    • Chain drive
    • Auxiliary units drive
  • Oil supply
    • Overview
    • Oil pump
    • Oil cooling
    • Oil filter
    • Oil pressure monitoring
    • Switchable piston cooling jets
  • Cooling system
    • System overview
    • Engine circuit and cooling module
    • Gear oil cooling/heating
    • Charge air cooling
    • Heating circuit
    • Radiator layout
  • Air supply and charging
    • Overview
    • Twin-scroll exhaust turbocharger
  • cylinder on demand
    • Introduction
    • Function
    • Active engine mounting system
    • Active noise cancelation (ANC)
  • Fuel system
    • Overview
  • Exhaust system
    • Overview
    • Exhaust valves
    • Secondary air system
  • Engine management system
    • System overview
    • MED 17.1.1. engine management system
  • Annex
    • Service
    • Test your knowledge
    • Self Study Programmes

The Self Study Programme teaches a basic knowledge of the design and functions 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: 92

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