The c5 is a wonderful beastie, always full of surprises
Considering it had such a short production run, there are a lot of "variables" amongst those produced....some motors are fitted with different windings that alter the performance characteristics ie some are actually faster on the flat,whereas others go uphill slightly better. Then there is the difference in size of the drive wheel that emerges from the gearbox, some only just accomodate an 18mm drive belt whereas others have space to spare. And so it goes on ...
Part of the joys of owning such an iconic machine