Volkswagen Porsche V8 4.0 TFSI EA825 engine

The VW EA825 (EA = development order) is a gasoline engine series of Volkswagen AG , which was developed by Porsche. The series includes eight-cylinder - V engines and is used in various vehicles of the Volkswagen Group since 2016th The engines are produced in the Porsche plant Zuffenhausen .

Technology

The displacement of 4.0 l eight-cylinder - V-type engine is 3996 cm³ with a bore of 86.0 mm and a stroke of 86.0 mm. The geometric compression ratio is 10.1. The V angle of the engine is 90 degrees. The engine has a gasoline direct injection .The change of charge is controlled by four valves per cylinder ( four-valve technology ) and a total of four overhead camshafts driven by a timing chain .

The engine has a cylinder deactivation via the so-called Audi valvelift system (AVS) , d. H. a two-stage stroke switching of the valves. At partial load, four of the eight cylinders can be shut down via another cam profile.

The 4.0-liter engine has two turbochargers (biturbo) that operate on the twin-scroll principle. The turbocharger is located in the inner V of the cylinder banks, d. H. the exhaust side is inside and the suction side outside. As a result, a compact design of the engine allows and keeps the gas flow paths short. The high-pressure fuel pump injects the fuel at 250 bar into the combustion chambers. 

Variants 

4.0-liter eight-cylinder (4.0 TFSI)