First of all, u need to know this is not fully manual. When u engage in manual mode, u get to play along ur so call virtual 7 speed gear. When ur rpm is higher than the gear spose to be, it will still automactically adjust ur virtual gear for u. U dun really get those kind of AMT or real gear as it's a CVT. FYI, new city aka 5G will have a fully manual transmission and no matter how high u rev ur rpm, it will maintain at ur desire gear. Too bad for 4G and below because of the virtual gear.

u mean if you floor the pedal, and its in manual mode the gear auto shift? .. its normal .

quickly speed up? how fast you want? if wanna speed up, floor the pedal, rev go over 4k.. enough ad.

There are several types of transmission in Honda City 3G and 4G, however for below procedure - i will explain these in my personal point of view

Direct to the point, I think if you need power, you should do the SPORT MANUAL MODE as below
1. Shift to S
2. Engage the 7 speed mode button (gear indicator will show up on dashboard)
3. hit downshift on your tiptronic (lower 1 gear) - (M will lights up on your dashboard, just beside the gear indicator)
4. REV! (and upshift when you feel the limit)

Of course, there are bulit in safety net that will automatically engage your gear up once your RPM reaches 6 or 7. That is to avoid stressing the gearbox too much (City uses Continuous Variable Transmission CVT, and heard it costs a bomb to replace, however there are some guys @ teamcity that's selling it for RM2 / 3K not sure including labour or not - i guess not!)

@ raymond, nice brakes. I'll consider it when it's time to change, it's worth the investment to spend for safety devices