The 2018 Ram 2500 stands as a testament to American durability, pairing a stout steel frame with a selection of potent powertrains. For those who demand serious capability, the inclusion of the Cummins turbodiesel engine is the cornerstone of this generation's identity. Delivering class-leading power and legendary reliability, the 6.7-liter Power Stroke provides the torque necessary to tackle any job or adventure, setting the standard in its segment long before the 2018 model year arrived.
2018 Ram 2500 Cummins Horsepower and Torque Specifications
Under the hood of the 2018 Ram 2500, the Cummins ISB6.7 turbocharged inline-six engine produces 370 horsepower and an impressive 850 lb-ft of torque. This specific output remained consistent throughout the model year, representing the peak of diesel performance for a half-ton capable truck. The substantial low-end torque is the defining characteristic, providing a surge of power that makes towing and hauling feel effortless from a standstill.
Performance Metrics in Context
Numbers on a page only tell part of the story; the real measure of the Cummins is how it feels behind the wheel. The massive torque curve allows the 2500 to pull heavy trailers and loads without straining the engine, creating a sense of calm confidence. Acceleration is smooth and deliberate, prioritizing efficiency and control over brute force, although the capability for sudden power is always present when needed.
Engineering and Design of the Power Stroke
The ISB6.7 design incorporates advanced technology to meet emissions standards without sacrificing durability. An air-to-air intercooler helps manage intake temperatures, ensuring efficient combustion and power delivery. The integration of a variable geometry turbocharger provides immediate response, reducing lag and ensuring that the 850 lb-ft of torque is available across a wide RPM range, from idle to highway cruising.
Towing and Payload Capacity Leadership
With the Cummins engine, the 2018 Ram 2500 could tow up to 31,210 pounds and carry a payload of 4,170 pounds. This capability is directly attributable to the high-torque output of the Power Stroke, which minimizes wheel spin and provides superior control when moving heavy masses. The diesel powerplant transforms the truck into a serious workhorse, capable of hauling fifth-wheel trailers and heavy equipment that would overwhelm many competitors.
Fuel Efficiency and Real-World Capability
Despite its power, the 2018 Ram 2500 Cummins offered respectable fuel efficiency, particularly when equipped with the available eTorque mild-hybrid system. This system used a belt-driven starter generator to assist during takeoff and recharge the battery, enhancing mileage in urban environments. On the highway, drivers could often achieve mid-20s MPG, a significant advantage for long-distance hauling or daily driving compared to gasoline alternatives.
Refinement and Driving Experience
Modern diesels have evolved beyond the rough-and-tumble trucks of the past, and the 2018 model exemplifies this progression. The Cummins engine operates with a muted growl rather than a harsh clatter, contributing to a comfortable cabin experience. Combined with the robust towing mirrors and available rearview camera, the driver benefits from a blend of capability and modern convenience that makes work feel less like a chore.
Reliability and Long-Term Value
The Cummins name is synonymous with durability, and the 2018 Ram 2500 continues that legacy. These engines are built with robust components designed to last well beyond the typical vehicle ownership cycle. For buyers seeking a truck that will perform heavy duties for years without major issues, the 2018 model represents a smart investment that holds its value and provides peace of mind mile after mile.
