Revs are higher when going faster, not always been the case

[Grahd]

Hello, My Clio 1.2 8V MK2 PH2 seems to have lost a lot of power at top end and the revs are high, I'm getting around 5000 RPM at 100MPh and was getting a lot less before as I could to get to 120MPH(on clock) but now it gets to 100MPH and there is no more power to go faster and the engine runs loud at 100. Quite a while before this issue started I changed the spark plugs with the exact ones that were already in there is it possible I overtightened them or is there something else I can check/change?

I am booking it into a full service next month too is this something they can look into?

Cheers if you can help!

 

[Dave..]

Could be anything. What happens if you stick it in fifth at 30 and put your foot down? Aside from keeping your license?

 

[MG cup]

Are your rear wheels following you and your fronts turning while driving too?

 

[tom172cup]

slow down? its only a 1.2

 

[Grahd]

This was on a straight private road, I don't drive that fast on public.

 

[Dan@SJM]

How long was the private road to get a 1.2 to 120mph?!?

 

[Grahd]

120 on my clock is about 105-108 MPH