
There are inter-related rite...
Century dash for city I-Vtec is 12 secs, city V-Tec around 10-11 secs, vios dugong 11secs plus....
But Myvi auto more than 13 secs....
also SS engine note on high rev. is much less coarse and loud compare to city & vios....except that we get the burning sensation or some say hair saloon smell

Why do I say 0-100 is not very important?? Let's take an example. As u said, century dash for city I-Vtec is 12 secs, city V-Tec around 10-11 secs, vios dugong 11secs plus....but Myvi auto more than 13 secs....
Ok, now let's put in a vehicle that's almost 2x heavier than any of the above - a Toyota Hilux, turbodiesel 2.5l around 100bhp only but torque in excess of 300nm, and the century sprint of this vehicle is > 15 seconds at least.
Based on the 0-100 dash paper specs, very likely that all of the above will smoke the Hilux. But yet, in a real situation, unless the Hilux driver is not gunning it, the Hilux will smoke any of the above in an in-gear acceleration scenario. So why is this so when the Hilux has inferior 0-100 dash capability?
That, fellas, is because of the Hilux massive torque, like almost 3x that of the cars above, and coming in at such low rpms. That's why I said that 0-100 times are purely academic coz in real life, what makes the car highly driveable and 'w/o much effort' is the torque more so than the power.
If a 1.5l car has a good spread of torque (which unfortunately the Swift doesn't possess), it makes it so much easier to drive in comfort instead of having to gun it hard everytime u wanna do some overtaking stunt. I think the Vios and City (especially the iDsi) has a better spread of torque than the Swift, making them much easier to accelerate on the move and overtake relatively easier than the Swift.
Sure, none of the above is as much fun to drive than the Swift, but reality bites hard