7 material differences · fewer than 12

Tractor oneLamborghini R-1556 DT1981–1984No measured PTO figureTractor twoSOMECA 1580 (TD)1979–1983No measured PTO figure

Which should you choose?

Read our verdict on the R-1556 DT and the 1580 (TD) → It is generated from the rows below by a fixed, versioned rule set, and names the figure behind every call.

7 material differences · 7 fields identical or within 5%, which is not counted as material

Lamborghini R-1556 DT and SOMECA 1580 (TD), field by field
Field	R-1556 DT	1580 (TD)	Gap
Engine
Engine power, claimed claimed	153 hp	152.9 hp	—
Engine declared	HÜRLIMANN/SAURER H-1106/15-Turbo	FIAT-IVECO 8365.25.500 or 8365.05.501	differs
Displacement declared	6.84 L	8.10 L	+18% 1580 (TD)
Maximum torque declared	434 lb·ft · 588 N·m	423–456 lb·ft · 573–618 N·m	—
Transmission
Top speed declared	18.6 mph · 30 km/h	15.5–18.6 mph · 25–30 km/h	differs
Hydraulics & hitch
Pump flow declared	14.3 gpm · 54.0 L/min	14.7 gpm · 55.8 L/min	—
Pressure declared	—	3,336–3,481 psi · 230–240 bar	—
Rear PTO speeds declared	540/1000 rpm	540 rpm / 1000 rpm	differs
Weight & dimensions
Unladen weight declared	13,889 lb · 6,300 kg	13,228 lb · 6,000 kg	—
Maximum permissible mass declared	—	22,046 lb · 10,000 kg	—
Wheelbase declared	113.3 in · 2,877 mm	116.7 in · 2,963 mm	—
Length declared	178.1 in · 4,525 mm	170.3 in · 4,325 mm	—
Width declared	95.3 in · 2,420 mm	85.0–108.7 in · 2,160–2,760 mm	differs
Height, over the cab declared	110.2 in · 2,800 mm	109.6 in · 2,785 mm	—
Ground clearance declared	20.1 in · 510 mm	27.4 in · 695 mm	+36% 1580 (TD)
Fuel tank declared	126.8 qt · 120.0 L	295.9 qt · 280.0 L	+133% 1580 (TD)

Source

Source