10 material differences · fewer than 12

Tractor oneVALMET 8550 HiTech1998–2003No measured PTO figureTractor twoZETOR 161451984–1990No measured PTO figure

Which should you choose?

Read our verdict on the 8550 HiTech and the 16145 → It is generated from the rows below by a fixed, versioned rule set, and names the figure behind every call.

10 material differences · 4 fields identical or within 5%, which is not counted as material

VALMET 8550 HiTech and ZETOR 16145, field by field
Field	8550 HiTech	16145	Gap
Engine
Engine power, claimed claimed	157.8 hp	157.8 hp	—
Engine declared	VALMET 634 DSR (E)	—	—
Displacement declared	7.37 L	—	—
Maximum torque declared	479 lb·ft · 650 N·m	356 lb·ft · 483 N·m	+35% 8550 HiTech
Transmission
Top speed declared	24.9–31.1 mph · 40–50 km/h	18.6–24.9 mph · 30–40 km/h	differs
Clutch declared	Pedal-operated dry Fichtel & Sachs single-disc clutch	pedal-operated dry ZTS single-disc clutch	differs
Hydraulics & hitch
Pump flow declared	19.4 gpm · 73.6 L/min	12.2 gpm · 46.3 L/min	+59% 8550 HiTech
Pressure declared	3,046 psi · 210 bar	2,828 psi · 195 bar	+8% 8550 HiTech
Rear PTO speeds declared	540/1000 rpm	540 rpm / 1000 rpm	differs
Weight & dimensions
Unladen weight declared	11,244 lb · 5,100 kg	11,244 lb · 5,100 kg	—
Maximum permissible mass declared	18,739 lb · 8,500 kg	—	—
Wheelbase declared	108.2 in · 2,748 mm	106.3 in · 2,700 mm	—
Length declared	194.4 in · 4,937 mm	183.7 in · 4,665 mm	+6% 8550 HiTech
Width declared	85.7–105.8 in · 2,178–2,688 mm	86.2–89.8 in · 2,190–2,280 mm	differs
Height, over the cab declared	109.6 in · 2,785 mm	106.1 in · 2,695 mm	—
Ground clearance declared	20.5 in · 520 mm	12.6 in · 320 mm	+63% 8550 HiTech
Turning radius, braked declared	—	17.0 ft · 5.17 m	—
Fuel tank declared	174.4 qt · 165.0 L	206.1 qt · 195.0 L	+18% 16145

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