Talk:Renault DeZir/@comment-2A01:CB05:4B6:2E00:AE17:C71:55F6:A00A-20171101221610/@comment-31458611-20171108183845

The 4th nitro level will cost you 55 or 56 in rank. But how can you know, you asked. For any given MAX variable (accel, TS, handling, nitro), the successive rank increases by level are 10, 15, 20, 25 and 30% of the total rank increase associated with that variable. And when you stepped up nitro from 1 to 3, the rank went up from 680 to 758, which means that the next step, or the 25% one, will add 25 x (758-680) / (15+20) to the rank.