I just learned about this engine. It's different because instead of a camshaft its valves are operated by pneumatic actuators. This detail makes it possible to switch between 2 and 4 stroke cycles depending on engine RPMs and load. The engine's controller can adjust valve timing to maximize performance, minimize fuel consumption or regulate emissions. The model that Koenigsegg is working on will be a 2L inline-3 capable of producing 300 HP (220kW) naturally aspirated. Pretty impressive.
