The new Legacy jets have the same flat-floor, 6-foot-high cabin cross section, but the 500 is longer. Embraer says the 450 will cruise at Mach .78 and the 500 at Mach .80, fastest in the class, and range with full reserves stretch to 3,000 nm for the larger 500. The jets are powered by Honeywell's HTF7000 family of engines rated in the 6,000- to 7,000-pound thrust range. Collins new Fusion integrated avionics system will be standard, including synthetic vision and autothrottle system. A head-up guidance system and enhanced vision will be options.