with respect bro GLI, ur wrong,
city wont sway at 140, but ur GLI might do, jsut look the the front angle of inclination of bonnet of city, its aerodynamics, and overall shape.
the car rolls at high speeds when wind clashes with the body, so more the aerodynamicity, lesser the roll,
for peroformance, Vario is CVT, stepless tranny, so u'll be busy changing gears in ur car, while the CVT in Sports mode (S mode) will have virtual gears to tackle a manual, so no gear changes in vario! agay ap ko pata hai