How do you know that radio version is right. In addition many song versions were recorded almost identical but at slightly different pace (different studio sessions). It is hard to get wrong CD speed since it is self adjusting system. It is adjusting rpm of CD (200-500rpm) to obtain constant linear velocity - (frequency of bits it reads) that is compared to crystal frequency. You might have one of those DJ units that have adjustable speed (for dance etc) or servo on your CDP is damaged.
CDP speed control
I spend a lot of time in my van. The radio's always on so quite often I hear a tune that initially seems slowed down but then I realize I've been listening to it sped up at home. Are these guys doing this to save space or improve performance? Like 45's vs. 33's? If so, is it not possible to incorporate speed control in a cdp? It really pissed me off when I bought a copy of the Beatles' Let It Be...Naked.