I drive my f06 650ix a TON = 40K per year. I ride and drive my buddy/neighbors 2017 f06 640ix several times a month.
I know some have said they don't notice a difference in power, that is just not my experience at all. They really are completely different cars to drive. One has 40% more power and gets much worse fuel economy. The power is noticeably felt all through the driving experience especially passing, the sound is also significantly different.
There has been a lot of talk and evidence of reliability issues in the 650, I haven't seen anymore issues than I have in my other performance german cars.
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