If the City you have at home is the one using CVT gearbox, then I think the low end torque response is very good as the gear ratio can be adjusted to suit lower RPM usage.
Wait, I think maybe I misunderstood you earlier when you mention 0 bar boost. You mean your engine will be running at 0-bar when it is under 2000rpm is it?
I think I should explain a bit more on the experience of driving a turbocharged car haha!
At idling (0% throttle), the boost level is -60 kPA.
At light throttle about 10-20%, the boost level will increase to maybe -40kPA to -20kPA.
At half throttle (50%), it will go up to 0-bar.
All these are vacuum area. Normally when we are driving with light load, we seldom drive past 0-bar because 0-bar is similar to a NA car (for me).
Beyond half throttle, the boost will start kicking in to positive region, and there's where all the fun are.
Cruising at normal speed (90-100km/h) doesn't require boost to sustain the speed so the reading may be around -40kPA. Cruising at higher speed to maybe 120km/h will demand higher pedal pressure at -20kPA. If I maintain my pedal at 0-bar, the maximum cruising speed will be around 130-140 km/h.
Any speed beyond, I will require some boost to help me sustain. I remember I was boosting 0.3-0.5 bar just to maintain my speed at 160km/h.
Back to your question, there is something called turbo spool or turbo lag. How quickly a turbo spool depends on many factors such as the size of turbine, the size of intercooler, piping length and design etc.
When my engine is running at below 2000rpm, the turbo is not spinning quick enough so the most it can go up to is 0-bar, but not able to generate sufficient boost until positive boost region.
I think someone else can help to explain a bit more hahaha! :sleep: