Specifications for a 4-Cylinder Cummins Diesel Engine

by Martin Cole

There are two types of 4-cylinder diesel engines developed by Cummins: the 3.9-liter Cummins 4bt and the Cummins B3.3. The latter comes in five versions, ranging from 60 to 85 in horsepower. Cummins is an American business that builds, sells and services engines and other internal vehicle parts.


The 3.9-liter Cummins engine has a displacement of 239 cubic inches. It can achieve 105 horsepower at 2,300 rpm and torque of 265 pound-feet at 1,600 rpm. The B3.3 has a displacement of 199 cubic inches. Of the five versions, the B3.3-60 has 60 horsepower at 2,200 rpm and 158 pound-feet of torque at 1,600 rpm. The B3.3-60 generates 65 horsepower at 2,600 rpm and 158 pound-feet of torque at 1,600 rpm. Producing 193 pound-feet of torque at 2,600 rpm, the B3.3-60 has 75 horsepower at 2,600 rpm. The B3.3-60 has 80 horsepower at 2,200 rpm and 215 pound-feet of torque at 1,600 rpm. Finally, the B3.3-60 has horsepower of 85 at 2,600 rpm and 215 pound-feet of torque at 1,600 rpm.

General Features

The B3.3 engines have an in-line, 4-cylinder design. Each cylinder has a 3.7-inch bore and a 4.5-inch stroke. The compression ratio is 18.0:1. In the 3.9-liter engine, the compression ratio is 17.5:1. The bore and stroke of the 4-cylinders is 4 inches by 4.7 inches.


The B3.3 engines are 27.7 inches tall, 19.5 inches wide and 28.1 inches long. They have an oil capacity of 7.9 quarts and a 4.8-quart coolant capacity. Depending on the version, the engine weighs between 520 and 553 pounds. The in-line, 4-cylinder engine weighs 782 pounds and can hold 10 quarts of oil. The engine is 30.6 inches long, 24.6 inches wide and 37.7 inches tall.

Optional Extras

The B3.3 engine has many options, including flywheel housing and multiple flywheels. Flywheels are rimmed wheels that rotate; they decrease variants in the revolutions per minute and angular velocity. There are also different options for the height of the fan and auxiliary pump drive. A power take-off drive can be installed to provide 100 percent torque ability. The engine can also come with a positive displacement air compressor that is gear-driven.

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