It shouldn't have made much of a difference, maybe the tires that came with them are reinforced sidewall, but you're going to need to choose acceleration over the look/feel of the tires.
Since your wheels are 215mm wide gas mileage won't be affected too much in terms of crusing.
I'm sure the car is fine, you might have lost at most 0.2 seconds in a quarter mile. My car is running charger 18's with the right size tires and acceleration isn't too bad (theres a 15 lbs difference between 16's and 18's), my fuel economy also dropped 10%.
Like i said, its either form over function. The trep isn't going to be beating many new cars on the road today, but at least you can maintain the look of the vehicle.