Any review I read of the N54 335i was very consistent 0-60 in 5.4 sec and 100mph in 12.1-12.8 no matter who or in what country they conducted the test.
4.7 sec in a manual N55 is a bit quicker than I thought.
They have the 335d quicker to 60mph too but then 100mph taking 14.2secs which is 0.5 down on test here. Gained 0.4 by 60mph and lost 0.9 from 60-100 to end up 0.5sec slower.
Just noticed their 335d is 20bhp down on the UK version.