Under the ownership of Rohr Industries since 1970, while the Flxible New Look was still in production, Rohr began development of what would become the Grumman 870 Advanced Design Bus. The Grumman 870 bus was one of two advanced-design buses (the other being the Rapid Transit Series (RTS II) developed by rival General Motors). Both models were compromises by the Urban Mass Transit Administration (UMTA), which sought to develop a "Transbus" design that would be "attractive, roomy, comfortable", and easier for elderly and disabled customers to board, accepting these two models as compromises. At the time, the federal government would subsidize the purchase of only the 870 or the RTS II.