Detroit Diesel's two-stroke engines were its bread and butter for decades, but the four-stroke Series 60 and DD15 were a big departure. How similar are the two?

Check out this 1.5 Billion Dollar engine featuring the Detroit Diesel DD15 with 1,850 lb-ft at 1,100 rpm torque inside Diesel Power Magazine.

There has been some talk about the inline-six engine making a comeback, and Detroit Diesel Corporation has long recognized its utility, designing the DD15 with an inline 6-cylinder configuration ...

Detroit Diesel's two-stroke engines were its bread and butter for decades, but the four-stroke Series 60 and DD15 were a big departure. How similar are the two?