160k isn't salary, it's total comp. A conservative Google new grad salary is going to be $110k + 35k in GSU/yr + 15K annual bonus (not including signing bonus). Many negotiate an extra 15-20k in GSU/yr.

220k is perhaps on the lower side for senior, maybe closer to 250k is on target. $140k at Google plus 90k in GSU/yr + 20k annual bonus. Could be much higher though.

It is also important to note that years 2,3,4 at Google are going to likely result in stock top ups and comp will skyrocket, but I was largely referring to starting salaries here.

Edit: Also, as mentioned I'm a young Senior. Google isn't likely going to bring me in at level 4.