The maximum cruising speed of the McDonnell Douglas MD-80 is Mach 0.76 (504 mph, 811 km/h)

The MD-80 is not made by Boeing, it is made by McDonnell Douglas. Different variants of the MD-80 can hold different amounts of fuel. The lowest being the MD-87 at 5840 gallons, the highest being the MD-83 at 7000 gallons.

McDonnell Douglas MD-520N aircraft

The ticker for McDonnell Douglas Corp was MD on the New York Stock Exchange. It was merged into Boeing Co on 8/1/1997.

What was MD stock price on jan 4 1990