Personally, I don´t think that the higher fuel-consumption was a major factor against the
MD-87. However, the
MD-87 was not a commercial success within the
MD-80series but secured some important orders which were highly contested. The main drivers for the
MD-87 were loyal
MD-80-operators. The original intention failed as a replacement for the DC-9-30.
Perhaps, this statement is an interesting one, once published by McDonnell Douglas in 1984:
“The design intent for the
MD-87 is to offer airlines the lowest costs per aeroplane-kilometre of any advanced technology aeroplane in its class. We believe that where traffic is suited to a smaller aircraft, the
MD-87 will be an ideal complement to the larger
MD-80s. Compared to the
MD-82, most common of the series currently in service, the
MD-87 will reduce direct operating costs per trip by 8 to 10 percent, according to our present estimates.
When greater passenger capacity is needed, one of the other
MD-80 models can be used to archieve lower costs per seat. With passenger configurations ranging from 109 to a maximum of 172 seats and the range capability varying from short hauls to transcontinental US or Australia service, we now can offer the airlines a twin-jet family with what we believe to be outstanding trip and seat economics and unparalleled flexibility. As a companion to other
MD-80s, the
MD-87 can give airlines maximum flexibility in meeting a wide range of service requirements. It can replace older, less efficient and noisier aircraft similar size and can meet growth needs for airlines currently flying smaller equipment."
The
MD-87 is a much more capable aircraft compared to the Fokker 100. The
MD-87 has the ability to lift a large amount of payload to provides a much higher usable range (even as a standard
MD-87 and not the
MD-87ER). This was important for some operators and the
MD-87 was seen as the best solution.
Other airlines selected the Fokker 100 (or BAe 146-300, Boeing 737-500 etc.). I think that the Fokker 100 was optimized for short hauls with a lighter airframe and performance data which reflected the demands of typical short missions. Some operators had their share of problems with their then-new Fokker 100s, including Swissair and KLM.
Btw. Swissair also decided to introduce the Fokker 100 to supplement their growing
MD-81-fleet and the
MD-87 was officially described by Swissair as "too heavy" for Europe. Ironically, the majority of
MD-87s were sold to European airlines. Some sources claim that Swissair originally wanted to operate the Fokker 100 with much "cheaper" pilots of Crossair but this wa snot allowed. Crossair later introduced the BAe 146/-200/-300. It is possible that the management of Swissair was not pleased with the idea to place their expensive pilots in a shortened
MD-80 (MD-87) with even more unattractive cost-structures. Subsidiary
CTA originally wanted to replace their Caravelle-fleet with Fokker 100ERs but ordered four
MD-87s because it seemed unrealistic to operate 119-seat Fokker 100s between Switzerland and the Canary Islands nonstop.
Other
MD-80-operators selected the
MD-87 and operated them for many years. The Fokker 100 was evaluated by SAS and Iberia and both airlines ordered the
MD-87.
It is noteworthy that only a few US-based
MD-80-operators opted to take the
MD-87 during the active production-run. Airlines like American, TWA, Alaska, Continental etc. decided against this version. So there were probably some important considerations and reasons to select alternative aircraft.
It is also interesting that a number of airlines originally operated a combined fleet of
MD-80s and Fokker 100s:
China Eastern Airlines, Korean Air, USAir and others.
Transwede even operated the
MD-80/-87 and Fokker 100 during a short time.
While most Fokker 100s replaced smaller aircraft, the Fokker 100 replaced portions of the Boeing 727-100-fleet at American Airlines and one manager once told that the Fokker 100 "would earn money from day one". The quietness of the Fokker 100 was also an important reason.
The Fokker 100 filled the gap between the services flown by American Eagle and the 142-seat Super 80.
Regards