the convertible "volante" version was unveiled at the north american international auto show held in detroit in 1996. both versions initially had a supercharged straight-six engine that has a power output of and of torque. in the united states, the coupé was sold for us$140,000, and the volante for us$150,000. works service provided a special driving dynamics package, which greatly enhanced performance and handling for drivers who wanted more than what the standard configuration offered. the straight-6 models were phased out in mid-1999 due to lack of market interest.