FPV motor sizes explained: 1404, 2207, 2807 and more.
Learn what motor numbers actually mean, how stator width and height affect torque and throttle feel, and when it makes sense to size up or down for your next FPV build. This guide is written to help beginners choose faster and experienced builders compare motor classes more confidently.
What FPV motor numbers mean
FPV motor names usually follow a simple pattern such as 1404, 2207, or 2807. In most cases, the first two digits refer to stator width in millimeters and the last two digits refer to stator height. That means a 2207 motor has a stator that is 22mm wide and 7mm tall.
Those dimensions matter because stator size strongly affects how a motor handles load. Larger stators usually provide more torque and better control over bigger props, while smaller stators save weight and make more sense on compact, efficient builds.
How to think about motor size
Treat motor size as part of the whole power system, not as a single spec. Prop size, battery voltage, build weight, and your flying style all decide whether a smaller, lighter motor or a larger, torquier motor makes more sense.
1. Motor numbers describe stator size
A code like 2207 usually means 22mm stator width and 7mm stator height, which gives you a quick clue about the motor class.
2. Width and height affect feel
Wider stators generally help with torque, while taller stators often support stronger sustained output and top-end behavior.
3. Bigger is not always better
A larger motor can improve authority on bigger props, but it also adds weight and may hurt efficiency on smaller builds.
4. Size around the full build
Prop size, battery voltage, frame weight, and flying style should all be considered before you lock in a motor size.
Common FPV motor sizes
This table gives a practical overview of common FPV motor sizes, what stator dimensions they represent, and where they usually fit best. The exact best choice still depends on prop load, KV, frame style, and the way you want the quad to feel in the air.
Motor Size | Stator Dimensions | Best For | Typical Feel | Notes |
|---|---|---|---|---|
1404 | 14mm × 4mm | 3-inch to 3.5-inch ultralight builds | Light and efficient | Good for smaller props and sub-250 style setups. |
1507 | 15mm × 7mm | 3-inch to 4-inch aggressive builds | Punchy and responsive | Useful when a smaller quad needs more authority. |
2004 | 20mm × 4mm | 4-inch and lighter cinewhoops | Balanced and smooth | A practical middle ground between compact size and usable torque. |
2207 | 22mm × 7mm | 5-inch freestyle | Strong torque and classic freestyle punch | One of the most common all-around 5-inch motor sizes. |
2306 | 23mm × 6mm | 5-inch all-around and cinematic | Smooth with strong output | Often compared with 2207 because both work well on 5-inch props. |
2807 | 28mm × 7mm | 7-inch long range | High torque and steady control | Well suited to bigger props and endurance-focused setups. |
3110 | 31mm × 10mm | Heavy long-range and large props | Very strong and load-friendly | A larger motor class for bigger propellers and payloads. |
1404 motors
Best for lightweight 3-inch and 3.5-inch builds where low weight and efficiency matter more than brute force.
2207 motors
A proven 5-inch freestyle choice with excellent balance between torque, punch, and general-purpose flight feel.
2807 motors
A much larger motor class designed to control 7-inch props efficiently on long-range and endurance-oriented builds.
1404 motors explained
A 1404 motor uses a 14mm wide stator that is 4mm tall. This is a compact motor size that works well on lightweight 3-inch and 3.5-inch builds where every gram matters and the props are small enough that huge torque is not necessary.
This size makes sense when you want an efficient quad that still feels lively without carrying unnecessary motor mass. It is not the best fit for a heavy freestyle rig, but it can be excellent for ultralight and sub-250 style flying.
2207 motors explained
A 2207 motor has a 22mm stator width and a 7mm stator height. It is one of the most popular sizes in FPV because it delivers the kind of torque, responsiveness, and overall authority that 5-inch freestyle pilots usually want.
This size is often treated as the classic all-around 5-inch freestyle option. It has enough motor volume to feel locked in during aggressive moves while still staying practical for everyday freestyle and general-purpose flying.
2807 motors explained
A 2807 motor steps much further up in stator width while keeping a 7mm height. This is the kind of motor size you see on 7-inch long-range builds where larger props, longer flight times, and heavier airframes require more torque and better load handling.
On this kind of build, the goal is usually not maximum RPM. The goal is efficient thrust, predictable control, and a setup that stays comfortable under the load of larger props and long cruising flights.
Wider vs taller stators
Wider stators usually help with low-end torque and prop authority, while taller stators are often associated with stronger sustained output and top-end behavior. That is why two motors with similar volume can still feel different when one is wider and the other is taller.
In practice, this means you should not focus on one number alone. The full stator shape, motor weight, KV, and intended use all matter when comparing motors for a specific build.
When to size up or down
Size up when you increase prop diameter, add build weight, or want a stronger and more locked-in feel under load. Bigger motors make the most sense when the quad needs more torque to stay in control during punch-outs, recoveries, and efficient cruising with larger propellers.
Size down when the build is light and efficient by design. On smaller frames, a compact motor often feels better because it saves weight and avoids overbuilding the quad. The best choice is not the biggest motor you can fit, but the smallest one that does the job well.
Motor size FAQ
Not automatically, but a larger stator usually means more torque potential and better load handling. The final result still depends on KV, propeller choice, voltage, and overall build weight.
Both are popular 5-inch sizes, but they can feel slightly different because their stator shape is different. A 2207 is often described as punchy and balanced, while a 2306 can feel a little smoother depending on the setup.
Size up when the build gets heavier, the prop gets larger, or the quad feels weak under load. A bigger motor usually makes more sense when you want stronger recovery, more torque, or better control over larger propellers.
Size down when the build is light, the props are small, and you want better agility or efficiency. Smaller motors reduce weight and can feel better on compact frames where large stators would be unnecessary.
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