To save you the trouble of going to a rolling road and paying to get a graph of how much power your car has "alledgedly" got you can use the following spreadsheet to get just as accurate figures.

Simply enter the maximum power, torque and revs, and the name of your car, and click "Re-calculate" until you find a chart you like!!

http://www.btinternet.com/~vdsigs/fastolly/x-dyno.xls

Fantastic!!

Right I am going to use these down the pub!