London’s usually predictable afternoon traffic was recently thrown into disarray as a rare automotive masterpiece, the first Pagani Utopia in the legendary “Cinque” spec, made its public entrance.

Why let someone else make merry with your back catalogue when you could merry-make yourself?

Pagani doesn’t build cars the way the rest of the industry does. This $2.5 million creation is assembled by hand, with materials and details most brands abandoned years ago. There are no cost-saving ...