andyscot

I have just purchased a 2007 (57 reg) 2.0TDCI manual Galaxy Ghia. We love everything about it but I noticed that when on the motorway if I put my foot on the accelerator between 1000 and 2000 revs there will occasionally be a 'spike' in revs where the revs will increase by 500 immediately then fall back to where they were. There is no loss in acceleration but just sounds like an automatic changing up a gear. Is this normal?