Would a standard 325d do a genuine 160mph. Er No.
Could you ever see 160mph indicated, er possibly, given a long enough run up, a following wind and a downhill road…….
My 335d will just about hit the 155 limiter given enough space, but it takes ages to get there, and even in Germany on derestricted autobahns, you generally never have enough space to do so these days (unless you go out at 2AM, and don’t mind passing trucks with a 100mph differential speed………..)
Remember the power required to cancel aerodynamic drag increases as the cube of velocity, so there is a BIG power requirement difference between doing say 150mph and 160mph.