The Citation X was, for a period, the fastest civilian aircraft in the world — a Rolls-Royce AE 3007C-powered jet capable of Mach 0.92 cruise that fundamentally changed what operators could expect from a business aircraft. Up to eight passengers traveled in a comfortable cabin across approximately 3,300 nautical miles, enabling transcontinental and select transatlantic missions at speeds that compressed schedules in ways no competitor could match. Collins Pro Line 4 avionics equipped the flight deck. For buyers who prioritize speed above all else and need genuine coast-to-coast or oceanic range, the Citation X remains a uniquely compelling pre-owned option.