In 1986, MD-11 was launched, an improved and upgraded version of DC-10. The MD-11 was the most advanced trijet aircraft to be developed. It sold 200 units, but was discontinued in 2001 after the merger with Boeing as it competed with the Boeing 777. The final commercial aircraft design to be made by McDonnell Douglas came in 1988. The MD-90 was a stretched version of the MD-80, equipped with International Aero Engines V2500 turbofans, the largest rear-mounted engines ever on a commercial jet. The MD-95, a modern regional airliner closely resembling the DC-9-30, was the last McDonnell Douglas designed commercial jet produced.