The Convair 990 Coronado was a narrow-body jet airliner produced by the Convair division of General Dynamics, a "stretched" version of their earlier Convair 880 produced in response to a request from American Airlines. The 990 was lengthened by 10 feet, which increased the number of passengers from between 88 and 110 in the 880, to between 96 and 121. This was still fewer than the contemporary Boeing 707 (110 to 189) or Douglas DC-8 (105 to 173), although the 990 was claimed to be some 25 to 35 mph faster than either in cruise.
Read more about Convair 990 Coronado: Design and Development, Operational History, Variants, Operators, Accidents and Incidents, Aircraft On Display, Specifications (Convair 990A)