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Special features of the current Audi vee engine family are the 90 degree included angle between the cylinder banks and the spacing of 90 mm between the cylinders. The first member of the family was the 3.2 litre V6 FSI engine. The 4.2 litre V8 FSI engine is also a member of this family. It is available in two versions a comfort oriented basic version used for the first time in the Audi Q7 and a sporty high revving version for the new RS4. A V10 engine with 5.2 litres of displacement will also be available. Like the RS4 engine, the V8 in the Q7 has FSI direct injection, which following five victories in the Audi R8 Le Mans racing car is now being introduced in a production eight cylinder model. The V8 was retuned for use in the Audi Q7. A fuller torque curve up to nominal speed and spontaneous response these are the characteristics of this new engine. The engine excels not only with its dominant power output and high maximum torque. The resultant driving performance is excellent, even in the face of tough competition. RS4 high revving engine 377 045 Table of contents Introduction .6 Specifications . 8 Engine mechanicals Cranktrain 9 Crankcase ventilation .12 Chain drive . .14 Drive, ancillary units . .15 Cylinder head . .16 Oil circulation system Design . .18 Oil pump and oil filter module . .19 Oil pan Audi RS4 . .20 Oil circuit . .21 Cooling system Cooling system in Audi Q7 .22 Cooling system in Audi RS4 . .23 Air circulation system Air intake . .24 Intake manifold flaps . .24 Vacuum hoses in the Audi RS4 .26 Vacuum hoses in the Audi Q7 . .28 Fuel system Fuel system in the Audi Q7/RS4 . .30 Exhaust system Exhaust system . 32 Exhaust flap control in the Audi RS4 . .33 Secondary air system .34 Engine management System overview, Audi Q7 Bosch MED 9.1.1 . .36 System overview, Audi RS4 Bosch MED 9.1 .38 Operating modes .41 CAN data bus interfaces powertrain CAN data bus i