guys... just thought i'd pitch in my penny's worth. have a '99 vitz (1.0 liter, a/t) and am not a racing fan when it comes to such cars as they're not made for this purpose.
but i can tell u for a fact that i did end up wasting a much newer kia classic (1.3 liter, m/t) and an almost same aged corolla (1.6 liter, a/t) on shaheed-e-millat road in karachi. in both cases, we were rolling 20kph and 30kph before we started and i turned o/d off.
if we had started from zero, i can bet the result would be opposite!
max i've gone on petrol is 163kph (it was still gaining speed, but i gave up) (this was before getting cng kit)
and on cng it's touched 140kph max (touches 130 easily, but 140 is very difficult on cng!)
and i agree with everyone who says about a "magical power" the car of this class shows after 80kph with o/d off! it has to be experienced...