After Caterpillar stopped building on-highway engines in 2009, the main fight is between Detroit and Cummins when it comes to the best commercial diesel engines on the market currently.

The Detroit DD5 is the first of two new medium duty engines, with the Detroit DD8 planned to follow in 2018. The DD5 will initially offer two power ratings, one with 210hp and 575 ft.-lb.

Unearthing Motor City's Legacy: Beyond Barns to Detroit's Hidden Automotive ... it also harbors vintage industrial machinery and heritage fire engines. For a visual journey through this ...