Why does my engine stop at 4500rpm in 5th...?

Why does my engine stop at 4500rpm in 5th...?

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tvradict

Original Poster:

3,829 posts

275 months

Wednesday 8th January 2003
quotequote all
I know this has something to do with Drag Coefficient or some pish like that, but why?

I sometimes drive quite fast (well, as fast as my car will allow, which is really quite slow) revving the engine quite high along the way. Holding 1st to 5000, 2nd to 5000, third I've been as high a 6000, 4th seems to stop at 5500rpm, more the power loses it's effectiveness rather than not being there and I have never had the engine about 4600rpm in 5th. Despite nearly 10 months of trying, I just can't get it above that. Why? This is usually around 110/115 depending on passengers and the vast quantity of sh*t that gathers in the boot. But strangely, I've had 115 4 up with a bootful going on holiday, which I can't quite understand

Can someone 'in the know' explain this one?