Starting with the standard Up, three engines will be available at launch. The first two are gasoline engines rated at 59 and 74 horsepower. The third is a compressed natural gas (CNG) engine that outputs 67 horsepower.
The Cross Up is about as much of a crossover as the Mini Countryman (which is to say, not much of one), but it does ride higher than the standard Up. Most interestingly, the Cross Up gains an extra set of doors to aid ingress into its expanded rear seat.
The last, and oddest, Up concept is the Up Arruzza Sailing Team. (Yes, even the name is odd.) This nautical-themed, open-top concept features wood trim contrasting with its white paint. Presumably, "I'm on a boat" is playing on a continuous loop from its audio system.