Top speed of mach 0.92 is the fastest business jet ever built. The Citation x’s combination of speed, range and altitude makes it not only the most advanced jet in the air, but also most efficient. Powered by massive Rolls-Royce engines orginally designed for commercial airliners, the Citation X shrinks journey from Los Angeles to New York to approximately 4 hours covering a mile every  seconds. The Citation X can effectively serve both your  regional and transcontinental needs. All Citation X jets are also 100% wifi equipped. Seats 8 passengers.