Speed rating V is rated to 149mph W rated to 168mph Officially you should fit the rating recommended by the Manufacturer - though no problem to fit higher. ie if you have a 2 litre mondeo its OK to fit W tyres but you shouldnt fit S rated (112) to a Ferrari
Cheers chaps. Just had four new tyres, the old ones were 91V and I notice the new ones are 91W.</p> </p> So I should be OK.</p>