Cat C27 ACERT engines are the ideal solution for your demanding operations in the oilfield. Decades of field operation and intense research and development allow Cat C27 ACERT engines to deliver excellent performance with low operating costs and emissions. This is an ideal engine for land mechanical drilling applications such as mud pump drives. Cat C27 ACERT™ Industrial Diesel Engine. Ratings: 597-858 bkW (800-1150 bhp) @ 1800-2100 rpm meet U.S. EPA Tier 2 equivalent emission standards.