A positive displacement unit might not be the the best choice for a near stock clio. Whilst generating instant lower rpm boost, their higher end efficiencies are significantly worse than centrifugal units, thus output at higher rpm sufferes severely and you would be stuck trying to decide on efficient power placement through the rpm range.
And they are extremely large physically, especially if you actually want to make decent power. There would be packaging issues, especially if you wanted to fit an IC/chargecooler like you have mentioned, rather than mating the discharge directly to a newly fabricated stubby inlet manifold.
Their torque delivery is also a lot more brutal, and with the clio's weak gearbox and engine internals, the last thing you want to do is to generate massive torque at low rpm's.
A centrifugal is small, light and easy to install.
Their output isnt great at lower engine speeds as their output increases with the square of rpm, however this generates a much smoother torque curve, similar to stock, and will allow engine and drivetrain components to 'wind up' rather than be hit with a hammer blow of torque on snap throttle opening.
They are also much more efficient at higher rpm and boost outputs.
So you would be able to run a centrifugal unit at higher peak boost values than a linear positive unit, thus make more power on the same stock engine without overstressing components. It wont drive as well off idle, but you'll still have plenty enough power to cause traction issues.
I love positive displacement, but in this application they wont work as well.