The SDEC D series diesel engine features a high reliability, good fuel economy and fast transient load response. It is an outstanding representative of recently designed and leading technical indexes among domestic proven engines. With three optional engines of 5.3, 9.3 and 8.8L, the applicable power ranges from 132 to 375 Ps, making it the preferred power for medium sized passenger buses and city busses.
The prototype of D series is jointly designed with the Austrian company AVL to adapt to Chinese oil quality and user habits. In 2005, SDEC cooperated with the American SwRI to carry out reinforcing design and 4-valve upgrade following North American heavy-duty diesel engine standards. Meeting China IV and China V emission standards, this series engine has been selling well for 20 years, with currently more than 1 million sets in circulation.