Compare Mowers
List prices are the manufacturer’s published figures, re-checked daily; they exclude tax, freight and dealer setup.
A side-by-side reference of each model's stated specifications. MowerFacts doesn’t give opinions: where a published, spec-derived rule can separate machines we mark a Data Pick and show the rule; here, read the values and decide what fits your needs.
Best suited for
What each model is built for, from its duty class and key specs. This is a neutral reference — MowerFacts does not rank one model above another.
- Exmark Commercial 21 X-Series (ECX180) — commercial: daily paid use and high acreage; 21-inch deck; gas powered
- Husqvarna W520 — commercial: daily paid use and high acreage; 20-inch deck; gas powered
What’s different? The 4 differences that matter most, from the published figures.
- Commercial 21 X-Series (ECX180) lists at $1,899; W520 lists at $1,499, a $400 difference. List price is the maker's own figure before tax, freight and dealer setup. Dealers set the final price.
- Commercial 21 X-Series (ECX180) has a published top speed of 4.2 mph; W520 has a published top speed of 3.7 mph, a 0.5 mph difference. Top speed is the maker's maximum in transport. Mowing speed is lower and depends on grass, terrain and the deck.
- Commercial 21 X-Series (ECX180) has a 21 in (533 mm) deck; W520 has a 20 in (508 mm) deck, a 1 in difference. Deck width sets how much grass each pass covers. Mowing time also depends on ground speed, turns and obstacles, so a wider deck alone does not fix the job's length. Time both decks on your own lawn ›
- Commercial 21 X-Series (ECX180) weighs 117 lbs (53.1 kg); W520 weighs 112 lbs (50.8 kg), a 5 lbs difference. Operating weight bears on trailer payload, ramps and soft turf. On its own it says nothing about build quality. What Commercial 21 X-Series (ECX180)'s weight means for a trailer ›
calculated figures and what isn’t comparable
Calculated by MowerFacts
- Commercial 21 X-Series (ECX180) works out to 0.7 acres/hour; W520 works out to 0.6 acres/hour, a 0.1 acres/hour difference. Calculated by MowerFacts from deck width and the published top speed at 80% efficiency; it is not a manufacturer figure, and real mowing is slower.
Not comparable
- Engine Power: not published for Commercial 21 X-Series (ECX180).
- Fuel Capacity: not published for W520.
- Deck Material: not published for Commercial 21 X-Series (ECX180).
- Drive System: not published for Commercial 21 X-Series (ECX180).
- Discharge: not published for Commercial 21 X-Series (ECX180).
- Cut height range: not published for W520.
Verified means each manufacturer publishes the figure. A bigger number is only a bigger number; nothing here says which machine is better. The full specification table is below.
Which is faster on your property? › Measure your lawn once and MowerFacts times all 2 against it.
| Spec | Commercial 21 X-Series (ECX180) Exmark · Commercial |
W520 Husqvarna · Commercial |
|---|---|---|
| List price | $1,899 | $1,499 |
| Engine | ||
| Power Source | gas | gas |
| Engine Make | Kawasaki FJ180V | Kawasaki |
| Displacement | 10.9 ci (179 cc) | 10.9 ci (178.6 cc) |
| Engine Power | — | 4.6 hp |
| Engine Model | — | FJ180 KAI |
| Deck | ||
| Cutting Width | 21 in (533 mm) | 20 in (508 mm) |
| Deck Material | — | Aluminium |
| Discharge | — | Collection/BioClip®/Rear discharge |
| Min Cut Height | 1 in (25 mm) | — |
| Cut Positions | — | 9 |
| Max Cut Height | 4.5 in (114 mm) | — |
| Drive | ||
| Ground Speed | 4.2 mph | 3.7 mph |
| Drive System | — | Self-propelled, variable speed |
| Dimensions | ||
| Weight | 117 lbs (53.1 kg) | 112 lbs (50.8 kg) |
| Fuel Capacity | 1 gal (3.8 L) | — |
Where these models differ, explained
Commercial 21 X-Series (ECX180): Specs verified against the retailer listing on Jun 6, 2026 — altmantractor.com.
Independent reference database. Specs compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.