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.
- Grasshopper 729T — commercial: daily paid use and high acreage; 52-inch deck; gas powered
- Gravely PRO-TURN 552 KAWASAKI FX921 — commercial: daily paid use and high acreage; 52-inch deck; gas powered
What’s different? The 4 differences that matter most, from the published figures.
- 729T uses a Kubota engine; PRO-TURN 552 KAWASAKI FX921 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.
- 729T holds 7.2 gal (27.2 L) of fuel; PRO-TURN 552 KAWASAKI FX921 holds 12.5 gal (47.3 L) of fuel, a 5.3 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.
- 729T lists at $18,550; PRO-TURN 552 KAWASAKI FX921 lists at $14,999, a $3,551 difference. List price is the maker's own figure before tax, freight and dealer setup. Dealers set the final price.
- 729T has a 58.7 ci (962 cc) engine; PRO-TURN 552 KAWASAKI FX921 has a 61 ci (999 cc) engine, a 2.3 ci difference. Displacement is the engine's size, not its output. A larger engine is not necessarily a more powerful one.
what isn’t comparable
Not comparable
- Engine Power: not published for 729T.
- Voltage: not published for 729T.
- Weight: not published for 729T.
- Ground Speed: not published for 729T.
- Transmission: not published for PRO-TURN 552 KAWASAKI FX921.
- Deck Material: not published for 729T.
- Drive System: not published for 729T.
- Cut height range: not published for 729T.
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 | 729T Grasshopper · Zero-Turn |
PRO-TURN 552 KAWASAKI FX921 Gravely · Zero-Turn |
|---|---|---|
| List price | $18,550 | $14,999 |
| Engine | ||
| Power Source | gas | gas |
| Displacement | 58.7 ci (962 cc) | 61 ci (999 cc) |
| Engine Power | — | 31 hp |
| Engine Make | Kubota | Kawasaki® |
| Engine Model | — | FX921V |
| Fuel Type | Gasoline | gas |
| Cylinders | 3 | — |
| Electrical | ||
| Voltage | — | 12 V |
| Deck | ||
| Cutting Width | 52 in (1321 mm) | 52 in (1321 mm) |
| Min Cut Height | — | 1 in (25 mm) |
| Max Cut Height | — | 5.5 in (140 mm) |
| Deck Material | — | Fabricated |
| Deck Gauge | — | 7 |
| Drive | ||
| Transmission | T6 Drive Transmission | — |
| Ground Speed | — | 15 mph |
| Reverse Speed | — | 6 mph |
| Drive System | — | Parker® HTJ |
| Dimensions | ||
| Weight | — | 1447 lbs (656.4 kg) |
| Fuel Capacity | 7.2 gal (27.2 L) | 12.5 gal (47.3 L) |
Where these models differ, explained
729T: Specs verified against the manufacturer spec sheet on Jun 6, 2026 — grasshoppermower.com.
PRO-TURN 552 KAWASAKI FX921: Specs verified against the retailer listing on Jun 6, 2026 — bobcatofatlanta.com.
Independent reference database. Specs compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.