Mitsubishi Heavy Industries, Ltd. (MHI) and Wärtsilä Corporation of will jointly develop new small, low-speed marine diesel engines with cylinder bores of 350 and 400 millimeters (mm). The two companies agreed on joint design and development of engines of less than 450 mm cylinder bore in May 2008, based on a previously signed strategic alliance agreement. The new engines, to have a power range of 3,500–9,000 kW, will be developed in collaboration, taking advantage of the strengths of the two companies.