However , from 2016 onwards , more powerful versions of the N55 became available .
Initially , the high - output versions of the N54 ( such as used in the 2009 F01 740i ) were more powerful than the N55 .
From 2016 onwards , more powerful versions of the N55 became available .
Initially , the high - output versions of the N54 ( such as used in the 2009 F01 740i ) were more powerful than the N55 .