"The suspension is based on the Cup set-up. As a reminder, over the normal Renaultsport 182, this has lower ride height, stiffer springs (20% front, 15% rear), re-rated dampers (+20% front, +10% rear), strengthened front wheel hub carriers and revised steering geometry.
The Trophy suspension is lowered a further 10mm at the front with shorter springs. The dampers are supplied by Sachs Race Engineering and have a unique damping force/velocity curve. Normally only used in competition cars, these dampers cost 10 times more than a conventional road car damper and feature a remote reservoir to accommodate nearly 50% of the oil and gas. This remote reservoir provides three benefits:
It liberates enough space to package a thicker and therefore stiffer damper rod, thus increasing camber compliance. The increased oil volume brings better thermal stability, to enable the damper to maintain optimal performance at all times. The space liberated allows the hydraulic components and damper valving to work more effectively
Another unusual feature of the damper is that a hydraulic bump stop replaces the usual physical elastometric one. This gives a much more progressive stiffness rate once the bump stop starts to work and thus allows a lower ride height without compromising bump travel. The objective of the lower ride height is to improve the turn in and reduce understeer.
Overall, these chassis modifications give the Trophy much improved damping control at all speeds, improved traction and reduced body movements (roll and pitch). This is particularly noticeable on poor quality roads i.e. typical English B roads
These dampers are much more expensive than those normally used on road cars and their use will always be restricted to specialist performance cars"
http://www.carpages.co.uk/renault/renault-clio-part-2-29-05-05.asp