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 Navigator (NVS 48 in EFI) — commercial: daily paid use and high acreage; 48-inch deck; gas powered
- Altoz XR 480 / 540 / 540 SS — commercial: daily paid use and high acreage; 48-inch deck; gas powered
What’s different? The 5 differences that matter most, from the published figures.
- Navigator (NVS 48 in EFI) uses a Kohler ECH730 engine; XR 480 / 540 / 540 SS uses a Kawasaki engine. The engine maker builds the engine; the mower maker chooses the model, rating and fit, so the badge alone does not settle output or longevity.
- Navigator (NVS 48 in EFI) weighs 1,191 lbs (540.2 kg); XR 480 / 540 / 540 SS weighs 800 lbs (362.9 kg), a 391 lbs difference. Operating weight bears on trailer payload, ramps and soft turf. On its own it says nothing about build quality. What Navigator (NVS 48 in EFI)'s weight means for a trailer ›
- Navigator (NVS 48 in EFI) holds 7.5 gal (28.4 L) of fuel; XR 480 / 540 / 540 SS holds 5 gal (18.9 L) of fuel, a 2.5 gal difference. Tank size bounds how long a machine runs between stops. Consumption varies with engine, load and speed, so hours per tank are not fixed.
- Navigator (NVS 48 in EFI) has a published top speed of 7 mph; XR 480 / 540 / 540 SS has a published top speed of 8 mph, a 1 mph difference. Top speed is the maker's maximum in transport. Mowing speed is lower and depends on grass, terrain and the deck.
- Navigator (NVS 48 in EFI) cuts from 1 in (25 mm) to 4 in (102 mm); XR 480 / 540 / 540 SS cuts from 1.5 in (38 mm) to 4.3 in (108 mm). The cut-height range is the shortest and tallest cut the deck offers. Most lawns are kept well inside it.
calculated figures and what isn’t comparable
Calculated by MowerFacts
- Navigator (NVS 48 in EFI) works out to 2.7 acres/hour; XR 480 / 540 / 540 SS works out to 3.1 acres/hour, a 0.4 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
- Warranty: not published for Navigator (NVS 48 in EFI).
- Blades: not published for Navigator (NVS 48 in EFI).
- Transmission: not published for Navigator (NVS 48 in EFI).
- Fuel Type: not published for Navigator (NVS 48 in EFI).
- Price: XR 480 / 540 / 540 SS is dealer quote only.
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 | Navigator (NVS 48 in EFI) Exmark · Commercial |
XR 480 / 540 / 540 SS Altoz · Commercial |
|---|---|---|
| List price | $20,499 | dealer quote |
| Engine | ||
| Power Source | gas | gas |
| Engine Make | Kohler ECH730 | Kawasaki |
| Displacement | 44.2 ci (725 cc) | 44.3 ci (726 cc) |
| Engine Power | 23 hp | 23 hp |
| Cylinders | — | 2 |
| Engine Model | — | FR |
| Fuel Type | — | Gasoline |
| Deck | ||
| Cutting Width | 48 in (1219 mm) | 48 in (1219 mm) |
| Blades | — | 3 |
| Deck Material | 7-gauge sides joined by a continuous bead weld to a 10-gauge top, 3/16" wear guard | Fabricated Steel |
| Deck Gauge | 7 | — |
| Anti-Scalp Rollers | — | Yes |
| Min Cut Height | 1 in (25 mm) | 1.5 in (38 mm) |
| Blade Tip Speed | — | 18501 ft/min (5639 m/min) |
| Max Cut Height | 4 in (102 mm) | 4.3 in (108 mm) |
| Drive | ||
| Transmission | — | Hydrostatic |
| Ground Speed | 7 mph | 8 mph |
| Drive Tire Size | — | 20" |
| Reverse Speed | 4.5 mph | — |
| Dimensions | ||
| Weight | 1191 lbs (540.2 kg) | 800 lbs (362.9 kg) |
| Fuel Capacity | 7.5 gal (28.4 L) | 5 gal (18.9 L) |
| Length | 94.5 in (2400 mm) | 80 in (2032 mm) |
| Width | 49.2 in (1250 mm) | — |
| Height | 51.2 in (1300 mm) | 49 in (1245 mm) |
| General | ||
| Warranty | — | 3 yr |
Where these models differ, explained
Navigator (NVS 48 in EFI): Specs verified against the retailer listing on Jun 6, 2026 — exmarkofdalton.com.
XR 480 / 540 / 540 SS: Specs verified against the manufacturer spec sheet on Jun 6, 2026 — altoz.com.
Independent reference database. Specs compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.