The Cessna Citation X is the worlds fastest civilian plane currently in service. The Citation X (pronounced ten) has a top speed of 1120 kph which is under the supersonic speeds achievable by Concorde and has a range of 6,000 kilometers (half of that of the Bombardier Global Express XRS). The planes spacious cabin seats between eight and twelve passengers and two crew members. More information is available from Cessna’s Citation micro site.