8 material differences · fewer than 12
Tractor oneRenault 421 M1977–1985No measured PTO figureTractor twoSOMECA 420 (TD)1978–1985No measured PTO figure
Which should you choose?
Read our verdict on the 421 M and the 420 (TD) → It is generated from the rows below by a fixed, versioned rule set, and names the figure behind every call.
Field by field
8 material differences · 6 fields identical or within 5%, which is not counted as material
| Field | 421 M | 420 (TD) | Gap |
|---|---|---|---|
| Engine | |||
| Engine power, claimed claimed | 41.4 hp | 41.4 hp | — |
| Engine declared | MWM D 325-3 | FIAT-IVECO 8035.01.308 | differs |
| Displacement declared | 2.55 L | 2.34 L | +9% 421 M |
| Maximum torque declared | 110 lb·ft · 149 N·m | 107 lb·ft · 145 N·m | — |
| Transmission | |||
| Top speed declared | 15.5 mph · 25 km/h | 15.5 mph · 25 km/h | — |
| Clutch declared | Dry Verto double clutch | — | — |
| Hydraulics & hitch | |||
| Pump flow declared | 6.8 gpm · 25.9 L/min | 4.5 gpm · 17.0 L/min | +52% 421 M |
| Pressure declared | — | 2,843 psi · 196 bar | — |
| Rear PTO speeds declared | 540 rpm | 540 rpm | — |
| Weight & dimensions | |||
| Unladen weight declared | 4,398 lb · 1,995 kg | 3,638 lb · 1,650 kg | +21% 421 M |
| Wheelbase declared | 78.0 in · 1,982 mm | 74.8 in · 1,900 mm | — |
| Length declared | 130.4 in · 3,312 mm | 113.4 in · 2,880 mm | +15% 421 M |
| Width declared | 66.1–83.9 in · 1,680–2,130 mm | 65.2–81.1 in · 1,657–2,059 mm | — |
| Ground clearance declared | 15.7 in · 400 mm | 17.7 in · 450 mm | +13% 420 (TD) |
| Turning radius, braked declared | 10.9 ft · 3.31 m | 9.7 ft · 2.95 m | +12% 421 M |
| Fuel tank declared | 50.7 qt · 48.0 L | 38.0 qt · 36.0 L | +33% 421 M |
Height is not in this table. It is not one measurement: the sources measure it to different points — over the cab on some machines, over the steering wheel or the exhaust on others — and the same tractor measured two ways can differ by most of a metre. It appears here only when both machines' figures carry the point they were measured to and it is the same point, which is not the case for these two. Each machine's own page prints its height as its source gives it.
Renault 421 M sources
- Source: Traktorenlexikon, “Renault 421 M / R 7421”
- Source: Traktorenlexikon, “Renault 60 R7253”
SOMECA 420 (TD) sources
- Source: Traktorenlexikon, “Someca 420”
- Source: Traktorenlexikon, “Fiat 420/420 DT”