Cummins 2021 Efficiency Series Engines
For 2021 Cummins will release new engines. All of the Efficiency Series engines will achieve peak torque at 950 rpm. Downspeeding is one of the tools to improve fuel use. This torque curve change helps the engines gain an impressive 3.5% fuel economy. This Series will have a new generation of EX engines, which are laser focused on Fuel Efficiency.