Porsche's 991 911 is the next step in the evolutionary lineIt may be hard for the untrained eye to spot the differences between the older 997 and new 991 versions of the 911, but people have been saying that for years when it comes to Porsche's most famous model. The 911 may have not changed significantly when it comes to styling, but there's enough going on under the flesh to justify it being called an "all-new" model.First of all, in a move that...
