Self Study Program 920223 – The Audi 4.0L V8 TFSI Engine with Twin Turbochargers

VAG SSP 920223 . The Audi family of V engines has been expanded. The new 4.0-liter V8 TFSI engine is the first 8-cylinder gasoline engine with twin turbocharging and FSI technology. Based on the 4.2L V8 FSI normally aspirated engine of the 2012 Audi A8, capacity was modified to further enhance fuel efficiency.

Additional fuel savings have been realized through cylinder deactivation. By deactivating four cylinders in various load and operating conditions, the engine uses less fuel.

Limited space in the engine compartment was overcome by mounting both turbochargers and the charge air cooler in the inner V of the engine. Referred to as an HSI (Hot Side In) arrangement, special monitoring ensures that under hood temperatures are kept within a safe and efficient range.

The broad performance spectrum of this engine is intended for use in other Audi models and other brands in the VW Group.

The 4.0L V8 TFSI engine uses Audi modular efficiency technologies, for example, in the design of the recuperation system and in friction reduction. High-end technologies, such as plate honing, are employed during manufacturing at the Audi factory in Györ, Hungary.


  • Introduction
    • Eight Cylinder Engines at Audi
    • Brief Technical Description
    • Variants
    • Audi S6 and S7 (C7 series)
    • Audi A8 and S8 (D4 series)
  • Engine Mechanical 
    • Cylinder Block
    • Bed Plate
    • Oil Module in the Inner V
    • Crankshaft Assembly
    • Crankcase Breather and Ventilation
    • Coarse Oil Separation
    • Fine Oil Separation
    • Introduction of Cleaned Blow-By Gases
    • Crankcase Ventilation (PCV)
    • Evaporative Emission System
    • Cylinder Heads
    • Chain Drive
    • Accessory Drive
  • Oil Supply
    • Oil Supply
    • Operation of Volumetric Flow Control
    • Oil Pressure Regulation
    • Oil Cooling
    • Oil Filter
    • Oil Consumers
    • Oil Pressure Monitoring
    • Switchable Piston Cooling Jets
  • Cooling System
    • Engine Cooling Circuit and Cooling Module
    • Map Controlled Engine Cooling Thermostat F265
    • Transmission Fluid Heating/Cooling
    • System 2 in Audi A8
    • Turbocharger Cooling and Lubrication
    • Charge Air Cooling
    • Heater Circuit
  • Air Supply and Charging
    • Twin-Scroll Turbocharger
    • Twin-Scroll Design
    • Air Supply Schematic
    • Charge Pressure Regulation
  • Cylinder Deactivation (Cylinder on Demand)
    • Allocation of Camshaft Actuators (AVS)
    • Active Engine Mounts
    • Purpose of the Engine Mount
    • Active Noise Cancelation (ANC)
    • ANC Deactivation
  • Fuel System
  • Exhaust System
    • Exhaust Flaps
    • Secondary Air System
  • Engine Management
    • Engine Management MED 17.1.1
    • Engine Compartment Temperature Management
  • Special Tools and Fixtures
  • Knowledge Assessment

The Self-Study Program provides introductory information regarding the design and function of new models, automotive components, or technologies.
The Self-Study Program is not a Repair Manual!
All values given are intended as a guideline only.
For maintenance and repair work, always refer to current technical literature.

Language: English
Format: PDF
Pages: 96

Self Study Program 920223 – The Audi 4.0L V8 TFSI Engine with Twin Turbochargers