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Smittybilt 2781 vs Viair 400p – Best Air Compressor…

    Smittybilt 2781 5.65 CFM Universal Air Compressor






    VIAIR 400P – 40043 Portable Compressor Kit. Tire Pump

    Smittybilt 2781 vs Viair 400p

    Smittybilt 2781 vs Viair 400p: What makes the Smittybilt 2781 and Viair 400p different from one another in terms of air compressor? The goal of this comparison analysis between the Smittybilt 2781 and Viair 400p is to determine which is the best air compressor.

    Smittybilt 2781 vs Viair 400p – Quick Comparison Summary

    • Both the Smittybilt 2781 and the Viair 400p have some of the same excellent features, such as a 150 PSI pressure gauge, a storage bag, and much more.
    • While the Viair 400p only has 2.3 CFM, the Smittybilt 2781 has 5.65 CFM.
      The Smittybilt 2781 weighs 15 pounds, whereas the Viair 400p weighs 10.4 pounds.

    • A Viair 400p inline fuse is 40 AMP, compared to a Smittybilt 2781 inline fuse’s 30 AMP.

    • The length of the hose on a Smittybilt 2781 is 15.9 feet, while the length of the hose on a Viair 400p is 25 feet.

    • In comparison to the Viair 400p, the Smittybilt 2781 air compressor is extremely popular.

    • The Viair 400p’s dimensions are 13 x 11 x 9.5 inches, while the Smittybilt 2781’s dimensions are 15 x 12 x 11 inches.

    • The Viair 400p has a maximum airflow of 65 liters per minute, while the Smittybilt 2781 has a maximum airflow of 72 liters per minute.

    • The Viair 400p is more expensive than the Smittybilt 2781. 

    Smittybilt 2781 5.65 CFM Universal Air Compressor

    VIAIR 400P – 40043 Portable Compressor Kit. Tire Pump

    Smittybilt 2781

    Viair 400p








    Maximum Airflow

    72 Liters Per Minute

    65 Liters Per Minute

    Air Flow Capacity

    6 Cubic Feet Per Minute

    2.3 Cubic Feet Per Minute

    Hose Length

    15.9 Feet

    25 Feet

    Inline Fuse

    30 AMP

    40 AMP

    Cover Included

    Air Compressor, Pressure Hoses, Cary Bag

    Presta Valve Adapter, 3pc Inflation Tips Kit, Deluxe Dual Compartment Carry Bag, 25ft Inside Braided 5-in-1 Inflator/Deflator Air Hose with Inline 100 PSI Gauge, 12v Portable Compressor

    Pressure Gauge

    150 PSI

    150 PSI


    Bag Included

    Bag Included

    Power Source

    Corded Electric

    Corded Electric

    Recommended Uses For Product

    Drilling, Air Brushing, Spraying, Nailing

    Tire Inflation


    13 Volts

    12 Volts


    15 Pounds

    10.4 Pounds


    15 x 12 x 11 inches

    13 x 11 x 9.5 inches

    FAQS :

    Advertised at 5.65 cfm and 72 l/min, but these numbers don't match up. what's up? 72 litres per minute = 2.542656 cubic feet per minute.

    Answer: 72 lpm is the number for the model 2780 compressor. The Smittybilt website says that the 2781 has a flow rate of 160 lpm, which is equal to 5.65 cfm.

    How much pressure can the compressor take? What does the compressor's max pressure safety valve blow at?

    Answer: I have two of these compressors that feed into a 3-gallon tank and are controlled by a 120/90 psi pressure switch. Unfortunately, the pressure relief valves on both compressors pop at between 115 and 120 psi. I just bought two new 165psi safety valves to replace them.


    Answer: Some inches over 7 feet. with strong clamps. We took off the clamps and put in an adapter for a jumper cable. So, I don't have to open the hood or worry about scratching the battery terminals. Also, the coil hose was changed out for a straight hose.

    What exactly does this kit have? hoses or add-ons? bag? what can I hope for?

    Answer: It comes with a bag, a compressor, a coiled air hose, alligator clips for connecting to the battery, and an adapter with a pressure gauge that connects to the hose shown in the picture on Amazon. Except for the Schrader valve, all of the connections are quick connect. The Schrader valve stem connection screws on just like the cap. On the back of the compressor is a switch that turns it on and off. It doesn't turn off by itself, so if you are filling smaller items, like a bike tyre, you need to be aware that this compressor is powerful and will quickly overfill it. I got the pressure in my 285-17 tyres from 35 psi to 75 psi in about 5 minutes per tyre. Between the alligator clip cable and the air hose, this should be able to do all the tyres on a typical civilian vehicle. It uses some power, so I wouldn't use it if the car wasn't running. That way, I wouldn't go from having a flat tyre to having a dead battery.

    Can you get a device that will turn off a compressor on its own?

    Answer: We don't sell anything like that to turn off the compressor at a certain PSI. The PSI fills would have to be controlled by hand. The automatic feature on our portable air compressors makes it much easier to move from one tyre to another and to check the tyre pressure in the middle of a fill. Compressors that aren't automatic must be turned off between filling tyres and when checking tyre pressure. That means you will have to run back and forth to the compressor to turn on and off the unit. The automatic feature will save you time and effort so that you can quickly get the tyres inflated.

    Can you plug the compressor into your truck's 12 volt outlet?

    No, it doesn't. It has separate connections for the positive and negative posts on a 12-volt battery. By the way, it's a great item.

    What makes this unit different from the 400p rvs. I saw an ad for an RV that said you should only buy models that had just been remodelled.

    Answer: The RVS unit comes with 60 feet of hose, a 90-degree twist-on chuck that is 40 inches long, and a new grey bag.

    I want to use the air hose that I have. It has a 1/4-inch quick-connect coupling that is standard. Will the viair work with it?

    Answer: You can use your own 1/4-inch hose with a quick coupler. Just make sure you use an open-ended chuck, since your 400P doesn't have an auto-shutoff feature.

    Can I connect a normal air hose to this unit?

    Answer: I'm not sure. It looks like the air hose that comes with it plugs into a connection that is unique to the compressor unit. Description: Smittybilt 2781 vs Viair 400P

    About this item – Smittybilt 2781 5.65 CFM Universal Air Compressor , Black

    • A storage bag is provided.
    • Smittybilt 2781 Universal Air Compressor, 5.65 CFM A Smittybilt Air Compressor is the most powerful compression device in its class, with a 1/3 horsepower oil-less direct drive engine and a 30 amp in-line fuse, plus the extra convenience of being able to air up or air down your tyres to meet various sorts of terrain.
    • The Smittybilt 2781 5.65 CFM Universal Air Compressor provides the extra advantage of allowing the tyres to be inflated or deflated to accommodate different terrain types. A Smittybilt air compressor is the most powerful in its category. It is equipped with a 1/3 horsepower oil-less direct drive motor and an inline 30 amp fuse.
    • 72 litres per minute is the maximum airflow. Quick-release coil hose measuring 24 feet in length
    • The thermal cutoff switch protects the motor from harm.
    • Few brands in the off-road business can match Smittybilt’s legacy. Customers have relied on Smittybilt for over 50 years to outfit their Jeeps with dependable and practical accessories.
    • All Smittybilt products are designed by off-road enthusiasts who saw a need for something superior to what was offered previously. This legacy of invention continues to this day with over 2,000 unique items for not only Jeeps but also trucks and SUVs.
    • In addition to widely imitated products such as the Sure Step, Smittybilt is mostly recognised for its distinctive bumpers and protection. However, their extensive product line also includes trail equipment, winches, soft goods, and much more, in addition to Jeep accessories.
    • Integrated 150 PSI pressure gauge that is easy to read.
    • The maximum continuous cycle time (duty cycle) at 40 psi and 75 degrees Fahrenheit is 40 minutes.

    About this item – VIAIR 400P – 40043 Portable Compressor Kit. Tire Pump, Truck/SUV Tire Inflator, For Up to 35-Inch Tires

    • Please Note: The air hose included with this kit may become brittle if exposed to UV or sunlight for an extended period of time.
    • Maximum working pressure of 150 psi and a 33% duty cycle.
    • utilises our brand-new I-Beam sand tray for enhanced stability and reduced weight. The 400P is a larger, more powerful portable tyre inflator kit that can inflate a 35-inch tyre to 30 PSI in less than six minutes. The 400P, used and endorsed by off-road enthusiasts worldwide, can save your life while you are miles from civilization.
    • For on-road and off-road car enthusiasts, VIAIR Corporation offers the most comprehensive array of DC, fractional horsepower, oil-less air compressors, and air accessories. Our compressors and components are the industry standard for 12- and 24-volt automotive aftermarket applications around the world.
    • The most comprehensive array of air compressors and air accessories for on- and off-road markets is offered by VIAIR. The industry standard for both 12-volt and 24-volt automobile applications globally, VIAIR products are utilised in the OEM market, 4×4 and Sport Air Suspension.
    • Their compressors are currently in use in every region of the world, in the toughest conditions imaginable, and the company is recognised by both its clients and colleagues as the leading manufacturer of high-performance air compressors for mobile pneumatic applications.
    • Direct dual battery clamps with an inbuilt 40-amp fuse.
    • Includes a premium carry bag and an anti-vibration tray, among other features.
    • 12 Volt Operated – 150PSI Working Pressure Maximum; engine must be running while in use.
    • 2.3 CFM at 0 PSI free flow