When it comes to professional-grade chainsaws, two models often stand out in the conversation: the Stihl MS 500i and the Husqvarna 390 XP. These chainsaws are engineered for high performance, heavy-duty forestry work, and demanding tasks that require raw power and cutting efficiency. Whether you’re a professional logger, a landowner with serious timber work, or someone who appreciates top-tier tools, choosing between these two powerhouses can be tough. Let’s dive deep into how the MS 500i and 390 XP compare in design, performance, technology, and user experience.
1. Engine Technology: Fuel Injection vs. Carburetor
One of the most significant differences between the Stihl MS 500i and Husqvarna 390 XP lies in their engine technology. The MS 500i is the world’s first chainsaw with electronically controlled fuel injection. This system adjusts fuel delivery based on temperature, altitude, and workload, offering optimal power at all times. It eliminates the need for a carburetor and enhances starting ease, throttle response, and fuel efficiency.
On the other hand, the Husqvarna 390 XP uses a traditional carbureted engine with X-Torq® technology, which reduces emissions and improves fuel efficiency compared to older models. However, it lacks the real-time adaptability of the MS 500i’s fuel injection system.
Verdict: If cutting-edge technology and responsive power are priorities, the MS 500i takes the lead.
2. Power and Engine Performance
Let’s look at the raw numbers. The Stihl MS 500i comes equipped with a 79.2 cc engine that produces around 6.7 horsepower (hp). That’s a massive amount of power packed into a saw that weighs about 13.9 lbs (powerhead only).
Meanwhile, the Husqvarna 390 XP sports an even larger 88 cc engine with 6.5 hp. However, it weighs 15.4 lbs (powerhead only), making it noticeably heavier than the MS 500i. While it delivers similar horsepower, the 390 XP’s extra weight can make a difference during long work sessions or when working overhead or on steep terrain.
Verdict: The MS 500i offers an impressive power-to-weight ratio, arguably the best in its class, giving it an edge for users looking for both muscle and maneuverability.
3. Cutting Performance and Handling
Both saws are capable of handling large trees and hardwoods. The MS 500i, thanks to its rapid acceleration and high torque, cuts incredibly fast, especially under variable conditions. Its lightweight body combined with high horsepower translates into less fatigue and quicker cutting—important for tasks like felling and bucking.
The 390 XP, while powerful and reliable, is slightly more demanding to handle due to its weight. However, it features low-vibration technology and adjustable oil flow, which help balance the load and reduce wear on the operator.
Verdict: For all-day use, especially in steep terrain or awkward positions, the MS 500i is easier to handle. But for experienced users who prefer the feel and power of a traditional saw, the 390 XP holds strong.
4. Durability and Build Quality
Both Stihl and Husqvarna have a reputation for building tough, long-lasting equipment, and these saws are no exception.
- The MS 500i features magnesium construction, which helps reduce weight while maintaining rugged durability.
- The Husqvarna 390 XP is known for its robust crankcase and cylinder, designed for prolonged use and resistance to wear, even in harsh conditions.
In terms of air filtration, both saws have excellent systems. The MS 500i uses Stihl’s HD2 filter, which keeps out fine dust and is easy to clean. Husqvarna counters with its Air Injection™ system, which pre-cleans air before it hits the filter—extending the filter’s lifespan and reducing maintenance intervals.
Verdict: It’s a tie. Both saws are engineered to withstand the rigors of professional forestry work.
5. Ease of Use and Starting
One area where the MS 500i clearly shines is starting performance. Because of its electronic fuel injection, the saw starts consistently in just a couple of pulls, hot or cold. There’s no need to adjust a choke or fiddle with a carburetor.
The 390 XP uses a Smart Start® system and a decompression valve, which makes starting easier than older models, but it still can’t match the simplicity of Stihl’s modern injection setup.
Verdict: The MS 500i wins for start-up convenience and overall user-friendliness.
6. Maintenance and Serviceability
While the MS 500i offers high performance and cutting-edge tech, that same technology means it’s more complex to service. The fuel injection system, though durable, may require specialized diagnostic tools if something goes wrong.
In contrast, the 390 XP is more traditional and easier to service in the field. Many experienced chainsaw users prefer this simplicity because they can make adjustments and repairs without needing advanced tools or software.
Verdict: For those who value DIY repairs and field fixes, the 390 XP might be preferable.
7. Bar and Chain Compatibility
Both saws are compatible with a wide range of bar sizes—typically from 20″ to 36″. The MS 500i is frequently paired with Stihl’s Light 04 or ES Light guide bars, which reduce weight while maintaining stiffness. Husqvarna offers X-Tough and X-Force bars, known for durability and balance.
Both brands offer high-quality chains like Stihl’s Rapid Super and Husqvarna’s C85/C83 full chisel chains, so cutting speed and chain durability are excellent on both sides.
Verdict: It’s another tie here, as both saws offer excellent bar and chain options for different cutting needs.
8. Price and Value
The MS 500i tends to be more expensive, thanks to its fuel-injection system and lighter build. It’s a premium saw aimed at professionals who want top-tier performance and are willing to pay for it.
The 390 XP, while still costly, is often slightly cheaper and appeals to users who want raw power and reliability without necessarily needing the latest tech.
Verdict: If budget matters, the 390 XP gives you serious performance for a little less money. But if cutting speed, comfort, and innovation are top priorities, the MS 500i justifies its higher price.
Final Thoughts
The Stihl MS 500i and Husqvarna 390 XP are both exceptional chainsaws that offer elite performance for professional users. Your choice will depend on your specific needs:
- Choose the MS 500i if you want lightweight handling, unmatched acceleration, modern technology, and maximum comfort.
- Choose the 390 XP if you prioritize simplicity, field-serviceability, and old-school power with tried-and-true reliability.
Whichever you choose, you’re getting a machine that’s built to take on the toughest jobs and deliver outstanding results every time.
