Just a quick point renault performance figures seem to underestimate the car. For example every road test I have seen for the 182 its 0-60 times has been well under 7.1 (renault claim to 100km/ph) lowest 6.3, however the Cooper S road test seem to suggest that the cooper S is not as fast as BMW claims, normally about 7.6 in mags.
Therefore expect the williams to be faster than 7.6
Williams Power to weight ratio 152 bhp per tonne
Cooper S works (210 bhp) power to weight ratio around 170 bhp
i would imagine though that the
MCS works would be slightly quicker point to point, wouldn't fancy the standard S chances though.