Boeing Said to Mull Stretching 737 to Counter Airbus A321neo

Boeing Co. is studying two designs for its so-called Max 10, a potential stretch of its largest 737 aimed at making up ground on Airbus Group SE’s longest single-aisle jet, according to people familiar with the plans.

One option Boeing has discussed with airlines and lessors in recent weeks is a simple lengthening of the 737 Max 9 that would offer much of the range and payload of Airbus’s A321neo, said the people, who asked not to be identified because the talks are private. The company is also vetting an alternative, more elaborate revamp that would feature the larger engines developed for the Airbus jet.