Above: a Scandinavian MD-81 in 2009 after a flight from Brussels to Copenhagen in 2009.
See
the back side of this airliner in Brussels. In 2009 Scandinavia airlines flies just 2 MD-81. But they also still fly 34 MD-82.
The MD 80/81/82/83 series is based on the DC-9. They are a bit longer,
and have different engines and wing, but the design of the front of the
airliner is still that of the DC-9.
The MD-81 and MD-82 are both 45,10 m long and seat both 150 passengers
with Scandinavian. Their fuel consumption is 0,041 l/seat km for both
MD-81 and MD-82.
The difference between the MD-81 and MD-82 is the range. The MD-81 has
only 1.400 km while the MD-82 has 2.400 km of range, thanks to more
powerful engines.