Depending on configuration, the 3.9-liter turbocharged diesel Cummins 4BT engine can generate between 105 and 170 horsepower. Although the engine's horsepower is modest, its torque is excellent, providing powerful pulling capability at low RPMs. This makes it particularly useful for commercial use, off-roading, and towing.

The Cummins 4BT has been used in real-world applications to power everything from Jeeps and custom pickups to delivery trucks and generators. It is a long-term investment for both commercial operators and enthusiasts due to its fuel efficiency and capacity to go hundreds of thousands of miles with adequate maintenance.