THE S80 is Volvo's big, bold hope to make the transition into BMW, Mercedes-Benz territory. The car has the goods, and the price. The S80 also scores for interior ambience, especially in the top-of-the-line 200kW T6 version which has a staggering array of standard equipment. It is also full of clever design touches such as a split-fold rear seat release actuated from the boot.