Talk:RR3 Wiki:Upgrades Strategy For 100% Completion/@comment-33144957-20170920122803/@comment-26829117-20170920123645

No we don't really know why but we suspect it is to do with rounding and PR is actually two decimal places but only displayed to one.

What we have worked out is that the delta PR appears to be the same for an upgrade type for each car. For example we think the C-X75 Engine upgrades should all be 0.6x but we don't know what x is.

We also don't know what the starting PR for any vehicle is for example, the C-X75 PR could be 66.8y. We've made a few attempts to calculate x and y but never found a satisfactory solution that would enable the tables to be more accurate.

We also don't know whether FM are rounding or truncating because they have some very strange rules.