The Volkswagen 2.5L Inline-five found in the current Golf, Jetta, and Passat has been ok engine during it’s life. Now, Volkswagen is changing the guard.
Car & Driver has learned from a couple of sources that Volkswagen is looking to replacing the 2.5 with a 1.8L turbo four. There are two reasons for the change. One is due to Volkswagen simplifying their manufacturing lines because the 1.8L turbo would be based on the same family as the 2.0L turbo. The second reason is due to how close the 2.5 and 2.0T are in fuel economy. A Jetta 2.5 equipped with a manual gets a MPG rating of 23 city/33 highway while the 2.0T equipped with a manual gets 22 city/33 highway.
Source: Car & Driver