No way Jose! This set up will not work. There is basically a 2 inch overall tire/wheel diameter difference between the ideal 205/55/16 and the 205/40/16 tires. This will cause all kinds of havocs with the speedometer/odometer functions as well as overtaxing your suspension and steering components. Fitting the 40 series tires will also give you a huge gap between the tires and the fender lips, especially with coupes still retaining it's original suspension and the US headlights strut insert spacer collars. Needless to say, not a very esthetically pleasing look.
Bert
72 3.5 CSi
88 M6