J.I. Case 431 or Nuffield PM-4?
Which should you choose?
On performance, every comparable figure that differs favours the J.I. Case 431: hydraulic flow. It is also ahead on PTO independence.
- The J.I. Case 431 suits PTO-driven implements (mowers, balers, pumps) better on this data: an independent PTO.
- The J.I. Case 431 suits loader and hydraulic implement work better on this data: 18% (4.9 L/min / 1.3 gpm) more hydraulic flow.
Generated by rule set compare@4 from the figures on the side-by-side table, allowed by route “the same stated configuration”. Measured figures are compared only with measured, claimed only with claimed, at the same test condition; differences within each figure’s tolerance are not called.
What decides it, question by question?
| Question | 431 | PM-4 | Call |
|---|---|---|---|
| Which puts more power through the PTO shaft? | 25.0 kW (33.5 hp)Traktorenlexikon, “Case 431” | 25.3 kW (33.9 hp)Traktorenlexikon, “Nuffield Universal PM 4 / Petrol (1948-1954)” | EvenEven on power at the PTO shaft (both power at the PTO, claimed): the difference is under the 10% threshold for claimed figures, too small to call. |
| Which turns a litre of fuel into more work at the shaft? | — | — | No figureNo call on fuel efficiency at the shaft: no figure on record for the 431 and the PM-4. |
| Which pulls harder at the drawbar? | — | — | No figureNo call on drawbar power: no figure on record for the 431 and the PM-4. |
| Which pumps more oil for implements? | 32.2 L/min (8.5 gpm)Traktorenlexikon, “Case 431” | 27.3 L/min (7.2 gpm)Traktorenlexikon, “Nuffield Universal PM 4 / Petrol (1948-1954)” | AheadThe J.I. Case 431 has 18% more hydraulic flow (4.9 L/min / 1.3 gpm) than the Nuffield PM-4 (both pump flow, as stated by the source). |
| Which lifts more on the three-point hitch? | — | — | No figureNo call on three-point lift: no figure on record for the 431 and the PM-4. |
| Which is heavier, for traction? | 1,741 kg (3,838 lb)Traktorenlexikon, “Case 431” | 2,062 kg (4,546 lb)Traktorenlexikon, “Nuffield Universal PM 4 / Petrol (1948-1954)” | Ahead (a fact, not an advantage)The Nuffield PM-4 is 18% heavier (321 kg / 708 lb) than the J.I. Case 431 (both unladen weight, as stated by the source). |
| Which may carry more ballast and load? | — | — | No figureNo call on maximum permissible mass: no figure on record for the 431 and the PM-4. |
| Which has the wider choice of gears? | 4 to 12Traktorenlexikon, “Case 431” | 5Traktorenlexikon, “Nuffield Universal PM 4 / Petrol (1948-1954)” | EvenEven on forward gears (both forward gears, as stated by the source): the figures vary by configuration and the ranges overlap. |
| Which offers a creeper range? | — | — | No figureNo call on a creeper range: not stated for the 431 and the PM-4. |
| Which is faster on the road? | 20 km/h (12.4 mph) to 35 km/h (21.7 mph)Traktorenlexikon, “Case 431” | 28 km/h (17.4 mph)Traktorenlexikon, “Nuffield Universal PM 4 / Petrol (1948-1954)” | EvenEven on top speed (both top speed forward, as stated by the source): the figures vary by configuration and the ranges overlap. |
| Which offers more PTO speeds? | 540 rpmTraktorenlexikon, “Case 431” | 540 rpmTraktorenlexikon, “Nuffield Universal PM 4 / Petrol (1948-1954)” | EvenEven on PTO speeds: the same speeds (540 rpm). |
| Which PTO runs independently of the ground drive? | independentTraktorenlexikon, “Case 431” | dependent (stops with the clutch)Traktorenlexikon, “Nuffield Universal PM 4 / Petrol (1948-1954)” | AheadThe J.I. Case 431 has an independent PTO; the Nuffield PM-4’s is dependent (stops with the clutch). |
| Which drives on both axles? | 2WDTraktorenlexikon, “Case 431” | 2WDTraktorenlexikon, “Nuffield Universal PM 4 / Petrol (1948-1954)” | EvenEven on drive: all two-wheel drive. |
| Which is newer, and what about parts? | 1960–1969 | 1951–1957 | Ahead (a fact, not an advantage)The J.I. Case 431 is newer: production began 9 years later. We hold no parts-availability data, so there is no call on parts. |
What does this mean in plain words?
- The J.I. Case 431 has 18% more hydraulic flow (4.9 L/min / 1.3 gpm) than the Nuffield PM-4 (both pump flow, as stated by the source).
- The Nuffield PM-4 is 18% heavier (321 kg / 708 lb) than the J.I. Case 431 (both unladen weight, as stated by the source).
- The J.I. Case 431 has an independent PTO; the Nuffield PM-4’s is dependent (stops with the clutch).
- The J.I. Case 431 is newer: production began 9 years later. We hold no parts-availability data, so there is no call on parts.
- Even on power at the PTO shaft (both power at the PTO, claimed): the difference is under the 10% threshold for claimed figures, too small to call.
- Even on forward gears (both forward gears, as stated by the source): the figures vary by configuration and the ranges overlap.
- Even on top speed (both top speed forward, as stated by the source): the figures vary by configuration and the ranges overlap.
- Even on PTO speeds: the same speeds (540 rpm).
- Even on drive: all two-wheel drive.
- No figure on record for every machine, so no call on: fuel efficiency at the shaft, drawbar power, three-point lift, maximum permissible mass and a creeper range.
← Every figure for both machines, side by side, with sources