Volkswagen of America has posted an article talking about their EA288 diesel engine, which is destined to replace their existing 2.0 TDI engine.
The new EA288 will eventually replace all the 2.0-liter TDI Clean Diesel engines fitted in Audi and Volkswagen TDI Clean Diesel models. The engine is a turbocharged, common-rail, direct-injection four-cylinder engine that makes 150 horsepower—an increase of 10 hp over the current engine—and 236 pound-feet of torque. This powerplant shares only the bore spacing with the previous diesel engine that shared the same designation. A number of changes have been made to help reduce emissions, such as: use of a complex exhaust gas recirculation system (with high pressure EGR and a cooled low-pressure EGR); integration of the water-cooled intercooler and the EGR valve with the intake manifold, which also improves throttle response; and packaging the exhaust after-treatment components close to the engine by combining the DPF with the SCR Catalyst.
The engine also has a number of modifications to help minimize friction and optimize fuel economy: there are low-friction bearings for the camshaft and balancer shafts, piston rings that have less pre-tension, and the oil pump is a two-stage device with volumetric flow regulation.
No idea if this will make its way into the Amarok or Tiguan, but still nice to see VW introducing a new generation of fuel efficient diesels engines. This engine should make it into the Jetta, Golf, Bettle, and Passat by mid 2014.