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.
- Scag Liberty Z — commercial: daily paid use and high acreage; 36-inch deck; gas powered
- Gravely COMPACT-PRO 34 KAWASAKI — commercial: daily paid use and high acreage; 34-inch deck; gas powered
What’s different? The 5 differences that matter most, from the published figures.
- Liberty Z holds 3.5 gal (13.2 L) of fuel; COMPACT-PRO 34 KAWASAKI holds 7.2 gal (27.2 L) of fuel, a 3.7 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.
- Liberty Z lists at $5,599 to $7,399; COMPACT-PRO 34 KAWASAKI lists at $8,099, a $2,500 difference. List price is the maker's own figure before tax, freight and dealer setup. Dealers set the final price.
- Liberty Z weighs 555 lbs (251.7 kg); COMPACT-PRO 34 KAWASAKI weighs 737 lbs (334.3 kg), a 182 lbs difference. Operating weight bears on trailer payload, ramps and soft turf. On its own it says nothing about build quality. What Liberty Z's weight means for a trailer ›
- Liberty Z has a 18 hp engine; COMPACT-PRO 34 KAWASAKI has a 15.5 hp engine, a 2.5 hp difference. Published horsepower is the maker's rating at a stated engine speed. It is a different measure from displacement, and two engines of equal rating can pull differently.
- Liberty Z has a 36 in (914 mm) deck; COMPACT-PRO 34 KAWASAKI has a 34 in (864 mm) deck, a 2 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 ›
calculated figures and what isn’t comparable
Calculated by MowerFacts
- Liberty Z works out to 2.0 acres/hour; COMPACT-PRO 34 KAWASAKI works out to 1.9 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
- Displacement: not published for Liberty Z.
- Fuel Type: not published for Liberty Z.
- Deck Material: not published for Liberty Z.
- Discharge: not published for Liberty Z.
- Cut height range: not published for COMPACT-PRO 34 KAWASAKI.
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 | Liberty Z Scag · Zero-Turn |
COMPACT-PRO 34 KAWASAKI Gravely · Zero-Turn |
|---|---|---|
| List price | $5,599–$7,399 | $8,099 |
| Engine | ||
| Power Source | gas | gas |
| Displacement | — | 36.8 ci (603 cc) |
| Engine Power | 18 hp | 15.5 hp |
| Engine Make | Kawasaki® FR Series | Kawasaki® |
| Engine Model | — | FX481V |
| Fuel Type | — | Gas |
| Deck | ||
| Cutting Width | 36 in (914 mm) | 34 in (864 mm) |
| Min Cut Height | 1.5 in (38 mm) | — |
| Max Cut Height | 4.5 in (114 mm) | — |
| Deck Material | — | 10 ga |
| Deck Construction | Dual-plate cutter deck constructed of 2 steel plates. Reinforcement plate at cutter deck spindles. | Fabricated X-Factor® 3 |
| Deck Gauge | — | 10 |
| Discharge | — | Side |
| Drive | ||
| Ground Speed | 7 mph | 7 mph |
| Drive Tire Size | 20″ x 8″-10″ (36″)20″ x 10″-8″ (42″, 48″ and 52″)20″ x 10″-10″ (61″) | — |
| Reverse Speed | 5 mph | 3 mph |
| Drive System | 36″ and 42″ models: Hydro-Gear ZT-2800 Transaxle48″, 52″ and 61″ models: Tuff Torq TZ450 Transaxle | Hydro-Gear® ZT-3100® Transaxles |
| Dimensions | ||
| Weight | 555 lbs (251.7 kg) | 737 lbs (334.3 kg) |
| Fuel Capacity | 3.5 gal (13.2 L) | 7.2 gal (27.2 L) |
| Commercial / Pro | ||
| Seat Type | Padded with arm rests, adjustment forward and back (tools required)(no armrests on 36″ and 42″ models) | — |
Where these models differ, explained
Liberty Z: Specs verified against the manufacturer spec sheet on Jun 6, 2026 — scag.com.
COMPACT-PRO 34 KAWASAKI: Specs verified against the retailer listing on Jun 6, 2026 — allmachines.com.
Independent reference database. Specs compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.