Swedish manufacturer Koenigsegg doesn't build anything but four-wheeled, two-doored supercars. This Koenigsegg Motorcycle Concept shows what a two-wheeled take might look like. Moscow-based designer Maxim Burov imagines the bike as a sleek affair, with wrap-around bodywork that hides the gas tank, engine, and the majority of the rest of the bike's components. The single seat is as short and stout as the bike itself, which lacks a windshield, and, for now, a working prototype.
This isn't the kind of concept car you see at the big auto shows. The Alfa Romeo C18 Concept is purely conceptual, as it doesn't exist at all. Yet. Designed by Antonio Paglia, it's based on the Alfa 8C, and has a swooping body with a "windscreen" that merges with the hood and is covered in a honeycomb pattern. It's unclear whether that would be replaced by traditional glass in a rear-world version, but what is clear is that the car's clean lines, contrasting surfaces, and LED lighting would all look great on the open road.