The 280 .57 and .58 versions have been produced for Poland since 1991, powered by the D2156HM6UT turbocharged engine with a power of 220 HP. The .57 version had a ZF S6-90 manual gearbox, and the .58 had a ZF 4HP500 automatic transmission. Both versions had accordion doors. Later there was a .58B version with lobe doors produced in 1992-93. D2156HM6UT, due to having a factory turbine, had a slightly different engine system than the regular D2156. These were very dynamic buses.
The engine is a modified version of the original D2156HM6U, but this bus was built with this modified engine already. The gearbox is a regular, not modified one.
@@BX60-05 That's amazing, it whistles like a turbo. Do you know when this bus was built? Do you know if there were any variations of the D2156 underfloor engines for the 280 prior to 1989? In Bulgaria they all sounded the same, but maybe there were other engine options. Then in 1993 they began re-engining to the D10. I read that existing D2156 units could be modified into the D10. Now I suppose those did have a turbo?
