I drive a stock '96 854R and absolutely love the car. My mother needs a replacement for her 760ti and I found a black R wagon in my paper for a seemigly reasonable price. I went and test drove the car for her and everything seemed great. One strange thing is that the turbo whined under boost. My turbo hisses under boost. Any thoughts on why two R's with similar milage and same year would have such a strikingly different sound? What sound does your turbo make?