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 Radius E-Series (RDE 54 in) — commercial: daily paid use and high acreage; 54-inch deck; gas powered
- Walker Walker Model R22 — commercial: daily paid use and high acreage; 54-inch deck; gas powered
What’s different? The 5 differences that matter most, from the published figures.
- Radius E-Series (RDE 54 in) uses a Kawasaki FR691 engine; Walker Model R22 uses a Kohler 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.
- Radius E-Series (RDE 54 in) holds 7 gal (26.5 L) of fuel; Walker Model R22 holds 3 gal (11.4 L) of fuel, a 4 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.
- Radius E-Series (RDE 54 in) cuts from 1.5 in (38 mm) to 5 in (127 mm); Walker Model R22 cuts from 1.5 in (38 mm) to 4 in (102 mm). The cut-height range is the shortest and tallest cut the deck offers. Most lawns are kept well inside it.
- Radius E-Series (RDE 54 in) has a published top speed of 8 mph; Walker Model R22 has a published top speed of 7 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.
- Radius E-Series (RDE 54 in) has a 23 hp engine; Walker Model R22 has a 22 hp engine, a 1 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.
calculated figures and what isn’t comparable
Calculated by MowerFacts
- Radius E-Series (RDE 54 in) works out to 3.5 acres/hour; Walker Model R22 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
- Displacement: not published for Radius E-Series (RDE 54 in).
- Weight: not published for Radius E-Series (RDE 54 in).
- Transmission: not published for Radius E-Series (RDE 54 in).
- Fuel Type: not published for Radius E-Series (RDE 54 in).
- Price: Walker Model R22 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 | Radius E-Series (RDE 54 in) Exmark · Commercial |
Walker Model R22 Walker · Commercial |
|---|---|---|
| List price | $6,999 | dealer quote |
| Engine | ||
| Power Source | gas | gas |
| Engine Make | Kawasaki FR691 | Kohler |
| Displacement | — | 45.6 ci (747 cc) |
| Engine Power | 23 hp | 22 hp |
| Fuel Type | — | Gasoline (unleaded - min. 87 octane) |
| Deck | ||
| Cutting Width | 54 in (1372 mm) | 54 in (1372 mm) |
| Min Cut Height | 1.5 in (38 mm) | 1.5 in (38 mm) |
| Max Cut Height | 5 in (127 mm) | 4 in (102 mm) |
| Drive | ||
| Transmission | — | Dual Independent Hydro-Gear ZT-2200 Integrated Transaxles |
| Ground Speed | 8 mph | 7 mph |
| Dimensions | ||
| Weight | — | 404 lbs (183.2 kg) |
| Fuel Capacity | 7 gal (26.5 L) | 3 gal (11.4 L) |
Where these models differ, explained
Radius E-Series (RDE 54 in): Specs verified against the manufacturer spec sheet on Jun 6, 2026 — exmark.com.
Walker Model R22: Specs verified against the manufacturer spec sheet on Jun 6, 2026 — walker.com.
Independent reference database. Specs compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.