David Brown 990 Implematic or International Harvester 504?
Which should you choose?
On performance, every comparable figure that differs favours the International Harvester 504: hydraulic flow. It is also ahead on top speed.
- The International Harvester 504 suits loader and hydraulic implement work better on this data: 100% (22.8 L/min / 6.0 gpm) more hydraulic flow.
- The International Harvester 504 suits road haulage better on this data: 36% (8.0 km/h / 5.0 mph) more top speed.
Generated by rule set compare@4 from the figures on the side-by-side table, allowed by route “similar machines”. 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 | 990 Implematic | 504 | Call |
|---|---|---|---|
| Which puts more power through the PTO shaft? | 33.1 kW (44.4 hp)Traktorenlexikon, “David Brown 990 Implematic” | 32.9 kW (44.1 hp)Traktorenlexikon, “IHC 504” | 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 990 Implematic and the 504. |
| Which pulls harder at the drawbar? | — | — | No figureNo call on drawbar power: no figure on record for the 990 Implematic and the 504. |
| Which pumps more oil for implements? | 22.7 L/min (6.0 gpm)Traktorenlexikon, “David Brown 990 Implematic” | 45.5 L/min (12.0 gpm)Traktorenlexikon, “IHC 504” | AheadThe International Harvester 504 has 100% more hydraulic flow (22.8 L/min / 6.0 gpm) than the David Brown 990 Implematic (both pump flow, as stated by the source). |
| Which lifts more on the three-point hitch? | 825 kg (1,819 lb)Traktorenlexikon, “David Brown 990 Implematic” | — | No figureNo call on three-point lift: no figure on record for the 504. |
| Which is heavier, for traction? | 2,164 kg (4,771 lb)Traktorenlexikon, “David Brown 990 Implematic” | 2,022 kg (4,458 lb)Traktorenlexikon, “IHC 504” | EvenEven on weight (both unladen weight, as stated by the source): the difference is under the 10% threshold, too small to call. |
| Which may carry more ballast and load? | — | — | No figureNo call on maximum permissible mass: no figure on record for the 990 Implematic and the 504. |
| Which has the wider choice of gears? | 6 to 12Traktorenlexikon, “David Brown 990 Implematic” | 5 to 10Traktorenlexikon, “IHC 504” | 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 990 Implematic and the 504. |
| Which is faster on the road? | 22 km/h (13.7 mph)Traktorenlexikon, “David Brown 990 Implematic” | 30 km/h (18.6 mph)Traktorenlexikon, “IHC 504” | AheadThe International Harvester 504 has 36% more top speed (8.0 km/h / 5.0 mph) than the David Brown 990 Implematic (both top speed forward, as stated by the source). |
| Which offers more PTO speeds? | 540 rpmTraktorenlexikon, “David Brown 990 Implematic” | 540 rpmTraktorenlexikon, “IHC 504” | EvenEven on PTO speeds: the same speeds (540 rpm). |
| Which PTO runs independently of the ground drive? | — | dependent (stops with the clutch)Traktorenlexikon, “IHC 504” | No figureNo call on PTO independence: not stated for the 990 Implematic. |
| Which drives on both axles? | 2WDTraktorenlexikon, “David Brown 990 Implematic” | 2WDTraktorenlexikon, “IHC 504” | EvenEven on drive: all two-wheel drive. |
| Which is newer, and what about parts? | 1961–1965 | 1961–1968 | EvenSame era: production began within 5 years of each other. We hold no parts-availability data, so there is no call on parts. |
What does this mean in plain words?
- The International Harvester 504 has 100% more hydraulic flow (22.8 L/min / 6.0 gpm) than the David Brown 990 Implematic (both pump flow, as stated by the source).
- The International Harvester 504 has 36% more top speed (8.0 km/h / 5.0 mph) than the David Brown 990 Implematic (both top speed forward, as stated by the source).
- 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 weight (both unladen weight, as stated by the source): the difference is under the 10% threshold, 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 PTO speeds: the same speeds (540 rpm).
- Even on drive: all two-wheel drive.
- Same era: production began within 5 years of each other. We hold no parts-availability data, so there is no call on parts.
- No figure on record for every machine, so no call on: fuel efficiency at the shaft, drawbar power, three-point lift, maximum permissible mass, a creeper range and PTO independence.
← Every figure for both machines, side by side, with sources