Originally Posted by
CT-UK
A 777 has a max of 0.8 Mach vs 0.86 for a 744. Quite a difference.
Boeing would disagree with you. Below are their typical listed cruise speeds at 35,000 (not maximum).
747-400 is
0.85 http://www.boeing.com/boeing/commerc..._400_prod.page
777-200 is
0.84 http://www.boeing.com/boeing/commerc...00product.page
777-300 is
0.84 http://www.boeing.com/boeing/commerc...00product.page