Ramp Test vs 20 Minute FTP Test vs 8 Minute FTP Test

[MI-XC]

FTP test vs Ramp test

Last week I did a 20 min FTP test and got 285w. To validate that number I did a ramp test today and got 250w due to my poor VO2max capability. Both day I was pretty fresh so I think the the values are good. I am starting the road race speciality this week and I would like to have your opinion on which value should I use. Thanks for your help, J-C