The G650, which was announced in March 2008, is the biggest, fastest and longest-range business jet yet. It is also the first entirely new design from the company since the Gulfstream II. The G650 features a cabin with 6-foot-5-inch headroom that is 8½ feet wide, the largest purpose-built business jet by far. Top speed is expected to be Mach .925 (525 knots), squeezing it past the speedy Citation X to claim the top speed for a civilian jet. And the G650 can cover 5,000 nm at Mach .90 (516 knots), or 7,000 nm at Mach .85 (488 knots), also far ahead of the competition.