Will a 215 65 r15 fit a 205 65 r15 tire?

Of course it will fit, but will it fit correctly is the question and the answer is no. Assuming the OEM tire is 205/65-15 and you install a 215/65-15 here is what you will get. Your speedometer will read 58.8 at a true 60 mph. You will also have slightly less power and your ride and handling will be adversely effected. Stick with the OEM size that the engineers who built your car recommend.