lol, it doesn't, trust me if your passenger is fiddling with navi and you accelerate it till 140, passenger won't know that you went past 80 it is that smooth, I know because I was the passenger while a friend did it.
and after wheel balancing and alignment(yeah it was off on brand new car but got it done for free only charges was to balance the new 17's) the toyota technician took for a test drive and accelerated till 140 and said it is good enough and we asked will it do 180kph vibration free? after u turn on our trip back to showroom he satisfied us by accelerating it to 180, now in back seat 180 was a bit terrifying but like 140 in older models so yeah stability is significantly better in 11th gen corolla.
now he was a kid in his 20s and had a broken arm with plaster over it so I'm sure grande would do much better in experienced hands.