Civitavecchia, Italy — Along Italy's Mediterranean coast on Thursday, driver Fabio Barone raced across the flight deck of a navy ship while chasing a world record: the fastest car on a boat. Last year ...

The Koenigsegg Agera RS did not stumble into the record books by accident. It arrived there through a ruthless focus on speed, stability, and usable performance that turned a niche Swedish hypercar ...