RIYADH, Oct 30 (Reuters) - Saudi startup Riyadh Air said

on Tuesday it had ordered 60 Airbus narrowbody

A321-family jets as it prepares to start operations in 2025.

The deal, signed at the Future Investment Initiative forum

in Riyadh, brings to 132 the total number of jets ordered by

Saudi Arabia's newest carrier, which last year ordered 39 Boeing

787 Dreamliners with options for 33 more.

The A321 deal would be worth around $4 billion after typical

discounts, based on estimated delivery prices from Cirium

Ascend.

It follows months of speculation about the order after a

report that it had chosen at least 100 Boeing 737 MAX aircraft.

The airline had cautioned that it was in the midst of a

sequence of potential orders and that it was studying both

Boeing ( BA ) and Airbus for the next narrowbody purchase.