The Rolls-Royce Phantom Coupé has a few of the same familial traits as its cousin, the convertible Drophead Coupé: rear-hinged suicide doors and an optional brushed-stainless-steel finish for the hood, and the same 6.75-liter V-12. However, increased structural rigidity and stiffer rear dampers produce a firmer ride, and a more substantial rear antiroll bar further reduces the Rolls’ trademark “waftability.” The Phantom Coupé can reach 60 mph in 5.6 seconds en route to a top speed of 155 mph. The interior includes optional starlight headlining, which uses fiber optics to make the roof resemble a starry night sky. The feature begs the question: Who needs a convertible? Pros: A nice cruiser with glamorous options.