Car and Driver is reporting that the next-generation Audi RS4 will retire the naturally-aspirated 4.2L V8 engine and use a turbocharged V6 engine. This is due to the upcoming emission regulations coming soon to Europe which are very stringent. Now the decision to go with a turbocharged V6 engine strikes us as odd since Audi currently has supercharged V6 that is being used in a number of their models. However Car and Driver says Quattro GmbH, the folks behind RS, is looking towards turbo power for future models.
Car and Driver also reports that a decision on whether or not the next-generation RS4 will come to the U.S. hasn't been made.
Source: Car and Driver