Tyres up sizing from 205 to 225

[Badboysun]

Can any one tell me what difference up sizing my tyres from 205 55 r16 to 225 55 r16 would make to the ride or performance to a c class w203 mercedes, having spent thousands already , I don't want to spend more on new alloys. 205 55 16 is the original set up.

 

[whitenemesis]

Sidewall will be 0.5" higher so ride will be 'softer' and the spedo will be reading slow by 2mph at an indicated 60

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