The Ferrari Roma Spider solved a problem that convertible GT cars have struggled with for decades: how to remove the roof without materially degrading either the driving experience or the visual coherence of the closed car. Ferrari’s retractable hardtop — which deploys or retracts in 13.5 seconds at speeds up to 60 km/h — preserves the Roma Coupe’s rear proportions sufficiently that the Spider does not look like a convertible that wishes it were a coupe. It looks like a car designed to be driven open, which is what it is.