Peterbilt 379 Vs 389: What’s the Difference & Which Should You Buy?

Would you consider trading in your Peterbilt 379 for a 389 if you’ve been driving one for a long time? They differ by only a few points, but they are significant nonetheless. Knowing the differences is essential to making an informed decision.

However, only a few differences exist between these two models, except for the fact that the 389 is merely a reconditioned 379.

Peterbilt 379 Vs 389: Which is the better? Both models were powered by the best engines available, resulting in reliable and powerful vehicles. Keep reading to find out more about each of them.

Peterbilt 379 Vs 389: Quick Comparison

SpecificationsPeterbilt 379Peterbilt 389
Design:-Traditional conventional truck (based on 1980s models)Classic all-aluminum truck
BBC length:-127 inches131 inches
Height:-13.5 ft.Approximately 12 to 13 feet
Headlights:-Basic headlightsImproved visibility and aerodynamics
Weight:-19,600 lbs (fully loaded tank)21,300 lbs (fully loaded tank)
Weight of engine:-2,890 lbs2,600 lbs
Filter gauge:-NoneParticulate filter for diesel
Engine used:-Detroit Diesel, Caterpillar, Cummins, & many moreCummins ISX & PACCAR MX-13 

Peterbilt 379 Vs 389: The Difference

Interior Features

A Peterbilt 379 truck is designed to optimize productivity and comfort. Due to the extra-large cab & contoured dash, all controls are within easy reach and easy to see as well.

Additionally, the Peterbilt 379 features a spacious, sound-proof sleeping cab system, making it the most comfortable truck available. Peterbilt 379 trucks are popularly equipped with 29 LTD Classic and the Cobra 25.

However, Peterbilt’s 389 models are known as “Icon of the Highway.” The Peterbilt 389 is equipped for long hours of road travel. Despite the spaciousness of the interior, this vehicle is comfortable and well-built. Luckily, Peterbilt’s SmartNav system is included with this 389 model.

With Bluetooth technology, drivers have access to vehicle information and entertainment with no need to look away from the road. As the dash is finished in charcoal, glare is reduced, and the dash will not fade or scratch.

The Peterbilt 389 is the winner in terms of interior features since it offers a lot of luxury while driving. UltraCab and low roof sleepers are equipped with shelves, cabinets, LED overhead lighting, & robust HVAC systems.  

Sleeper Options

The Peterbilt 379 gives you the conveniences of home while you’re on the road. The Peterbilt 379 comes in 4 standard sizes for detachable sleepers. Depending on the comfort level & weight, 379 offers the following sleeping arrangements:

  • Climate control at the rear
  • Power inverter
  • Audio control
  • Cabinets
  • Television bracket capabilities
  • Extra storage

Three sleeper options are available on the Peterbilt 389 truck model. The UltraCab offers 58”, 72″, and 78″ sleepers, while the Low Roof offers 44″, 58″, and 72″. Cabs are equipped with dark charcoal dashes that are scratch-free and UV-resistant.

Peterbilt 389 also tops in terms of storage because it comes with a refrigerator, microwave shelves, coffee maker, pantry cabinets and drawers, desk space, as well as a lift-up bunk. You will also find flat-screen or standard TVs in all of the sleepers.

Hood Features

Although each aluminum hood is slightly different, there are very subtle differences at first glance. A 131 inches BBC is standard on the 389, while the 379 is equipped with a smaller aluminum hood of 123”. Overall, the hoods of the 379 and 389 are wider and longer than the previous car models.

There’s a rounded edge around the grille of the 389, which is really noticeable as compared to the 379. In comparison to the modern wide-cabs, both the 379 and 389 are wider. Both models have a similar cab structure, but the 389 has a higher cab height and more streamlined styling to provide better airflow.

Peterbilt 389 is an upgraded version of 379. There is only a 4” difference in the length of the aluminum hoods and curved headlights of the 389. The 389 also has more advanced technology than the 379.

Engine Specs

Peterbilt’s 379 model offers you a wide choice of engines. The following engines are available for the 379:

  • Detroit Diesel (60, 12.7 series)
  • Cummins (N14, ISX, ISM)
  • Caterpillar (C16, C15, C13, C12, C11, C156NZ, 3406E, 3406C)

A powerful engine is used in the Peterbilt 389 model for enhanced power and weight savings, resulting in better fuel efficiency. A PACCAR MX-13 engine produces 500 horsepower & 1,850 lb-ft of torque, while still offering lightweight material advantages. A range of engine options is available for the 389, including:

  • Cummins ISX-15
  • PACCAR MX-13

Is there a particular reason why Peterbilt 389 won this category? The Cummins ISX15 engine can be fitted with a (CNG) compressed natural gas system in the 389. There is no better engine for fuel economy than the Cummins ISX15.

Peterbilt 379 Vs 389: Price Range

Brand new 2022 Peterbilt 389 models price over $200,000. However, there are plenty of older models priced as low as $120,000 that are on the market.

However, on the American market, the price of a second-hand Peterbilt 379 traditional truck ranges between $50,000 to $71,500. 

Basically, prices can vary based on a number of aspects, including age, location, condition, and specifications as well. Based on price and feature availability, Peterbilt 389 models are usually your best choices.

Peterbilt 379 Vs 389: What’s Better Than Others?

In 2007, Peterbilt stopped producing the 379 in place of its replacement, the 389 models. Whether you are an experienced driver or not, it is important to understand what you are buying.

A SmartNav consultant is included in the 389 vehicles and 150 pounds lighter compared to the 379 models. The 389 has a 4% reduction in fuel efficiency. Similarly, the hood is longer by 4 inches than the Peterbilt 379.

Compared to the 379, the 389 is an upgrade that is both straightforward and high quality also. The Peterbilt 389 headlights are 230% more effective, which is a significant improvement in invisibility.


How much horsepower does a Peterbilt 379 have?

2007 Peterbilt’s 379 models are powered by the Caterpillar C-15 engine, which can produce 475 horsepower. Featuring the latest technology, the Caterpillar C-15 provides semi trucks with adequate power for long trips on the highway.

How much does a Peterbilt cost?

Peterbilt trucks can vary greatly in price depending on the year, model, condition, mileage, and configuration. Peterbilt trucks typically cost between $160,000 to $300,000, although some models and custom-built tractors can cost over $550,000.

How many miles can a Peterbilt last?

Typically, Peterbilt semi trucks last between 750,000 and 1,000,000 miles through regular maintenance and proper care.

Sum Up

Even though there are only a few differences between Peterbilt 379 Vs 389, it’s still important to know what each is, and we discussed that already. Peterbilt trucks are known to be highly reliable, but with respect to specific models, they differ in subtle ways that ensure a comfortable & enjoyable ride.

Make sure to read other drivers’ reviews before buying, and do some research before getting started. The Peterbilt 389 is equipped with the latest technology, a stylish hood, an impressive engine, and a very comfortable cabin as well. Your decision between the 379 and 389 Peterbilts should now be a little easier!

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