The all-new XK just recently made its debut.Under the hood is a 4.2L V8 powertrain. With an output rating of 300 hp, the dead-sexy coupe should help move more cars out of the slow-moving Jaguar showrooms. Mated to the V8 is the manu-matic paddle-controlled 6-speed transmission. The aluminium body structure is 50% stiffer than its predecessor.