Offer one or two sporty or pseudo-sporty trim levels in car lines aimed largely at volume fleet buyers and up to a quarter of buyers will choose them, Vauxhall sales figures show. The UK GM operation said its sporty Vectra models take the highest percentage of sport model sales, accounting for 25 percent of all Vectra registrations. The MV6 Omegas take five percent and the Astras just under 12 percent. The company couldn't supply figures for the Corsa.