12 material differences
Tractor oneAGCO-ALLIS 66901991–1997No measured PTO figureTractor twoCase-IH 4240 (PRO)1993–1998No measured PTO figure
Which should you choose?
Read our verdict on the 6690 and the 4240 (PRO) → It is generated from the rows below by a fixed, versioned rule set, and names the figure behind every call.
Field by field
12 material differences · 3 fields identical or within 5%, which is not counted as material
| Field | 6690 | 4240 (PRO) | Gap |
|---|---|---|---|
| Engine | |||
| Engine power, claimed claimed | 88.8 hp | 88.8 hp | — |
| Engine declared | S.L.H. 1000.4 AT | IHC D-268 or D-268/68 | differs |
| Displacement declared | 4.00 L | 4.39 L | +10% 4240 (PRO) |
| Maximum torque declared | 224 lb·ft · 304 N·m | 232 lb·ft · 315 N·m | — |
| Transmission | |||
| Top speed declared | 18.6–24.9 mph · 30–40 km/h | 18.6 mph · 30 km/h | differs |
| Clutch declared | Pedal-operated dry Same double clutch type 12 inch | Pedal-operated dry single-plate clutch | differs |
| Hydraulics & hitch | |||
| Hydraulic centre declared | Open centre | — | — |
| Pump flow declared | 9.5 gpm · 35.8 L/min | — | — |
| Pressure declared | 3,046 psi · 210 bar | — | — |
| Three-point lift, at the coupling points declared | 6,790 lb · 3,080 kg | 7,374 lb · 3,345 kg | +9% 4240 (PRO) |
| Rear PTO speeds declared | 540/1000/540E/1000E rpm | 540/1000 rpm | differs |
| Weight & dimensions | |||
| Unladen weight declared | 6,856 lb · 3,110 kg | 6,691 lb · 3,035 kg | — |
| Maximum permissible mass declared | 11,464 lb · 5,200 kg | 12,125 lb · 5,500 kg | +6% 4240 (PRO) |
| Wheelbase declared | 96.4 in · 2,449 mm | 88.0 in · 2,235 mm | +10% 6690 |
| Length declared | 161.2 in · 4,094 mm | 148.0 in · 3,759 mm | +9% 6690 |
| Width declared | 82.4 in · 2,093 mm | 73.0–92.7 in · 1,854–2,354 mm | differs |
| Ground clearance declared | 17.3 in · 440 mm | 20.3 in · 515 mm | +17% 4240 (PRO) |
| Turning radius, braked declared | 9.6 ft · 2.94 m | — | — |
| Fuel tank declared | 83.5 qt · 79.0 L | 118.3 qt · 112.0 L | +42% 4240 (PRO) |
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.
AGCO-ALLIS 6690 sources
Source
- Source: Traktorenlexikon, “AGCO-Allis 6690”
Case-IH 4240 (PRO) sources
Source
- Source: Traktorenlexikon, “Case-IH 4240”