MPI MP21B

The MPI MP21B is a low-emissions diesel switcher locomotive built by MotivePower. It is powered by three Cummins QSK19C I6 engines with each one developing 700 horsepower (522 kW) and creating a total power output of 2,100 horsepower (1,570 kW). One MP21B locomotive was manufactured,^[2] currently operated by Amtrak.^[1]

MPI MP21B
Type and origin Power type Diesel-electric Builder MotivePower Model MP21B Build date 2008 Total produced 1
Specifications Gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge Prime mover Cummins QSK19C (×3) Engine type Straight-six engine Aspiration Turbocharger Cylinders I6 (×3)
Performance figures Power output 2,100 hp (1,570 kW)
Career Operators Amtrak[1]