Head to head · Utility

UTB/Universal 643 vs UTB/Universal U-651M

Image not recorded
UTB/UniversalModel A

UTB/Universal 643

Utility

power
64 hp
displacement
219 ci
Cylinders
4
Forward gears
12
Full 643 specs
Image not recorded
UTB/UniversalModel B

UTB/Universal U-651M

Tractor

power
65 hp
displacement
291 ci
Cylinders
4
Forward gears
10
Full U-651M specs
UTB/UniversalUTB/Universal 643
vs
UTB/UniversalUTB/Universal U-651M

How they compare

Headline specs vs. the whole Utility

n = 4,321–5,720

Engine Power

▲ U-651M higher · +1 hp (+2%)
64364 hp
U-651M65 hp
Median Utility Tractor55 hp

643 is in the 57th percentile; U-651M is in the 59th · 5,383 models

Engine Displacement

▲ U-651M higher · +72 ci (+33%)
643219 ci
U-651M291 ci
Median Utility Tractor183 ci

643 is in the 60th percentile; U-651M is in the 84th · 5,580 models

Cylinders

= Effectively tied
6434
U-651M4
Median Utility Tractor4

643 is in the 50th percentile; U-651M is in the 50th · 5,720 models

Forward Gears

▲ 643 higher · +2 (+20%)
64312
U-651M10
Median Utility Tractor12

643 is in the 50th percentile; U-651M is in the 39th · 4,941 models

643 (A)U-651M (B)Median Utility Tractor

Full comparison

Every spec, side by side

General Information

SpecUTB/Universal 643UTB/Universal U-651MDifference
ManufacturerUTB/UniversalUTB/UniversalSame
Model643U-651M—
CategoryUtilityNot recorded—

Engine

SpecUTB/Universal 643UTB/Universal U-651MDifference
ManufacturerUTBUTBSame
ModelNot recordedD-110—
Power Output64hp65hp▲ U-651M+1 hp · +2%
Rated RPM2,400RPM1,800RPM▲ 643+600 RPM · +33%
Cylinders44Same
Displacement219ci291ci▲ U-651M+72 ci · +33%
Bore4in4.3in▲ U-651M+0.3 in · +7%
Stroke4.3in5.1in▲ U-651M+0.8 in · +19%

Transmission

SpecUTB/Universal 643UTB/Universal U-651MDifference
TypeMultiple (constant mesh, creeper, shuttle)Manual—

Dimensions & Weight

SpecUTB/Universal 643UTB/Universal U-651MDifference
Length149in155in▲ U-651M+6 in · +4%
WidthNot recorded74.8in—
Height100in104in▲ U-651M+4 in · +4%
Operating Weight6,192lb8,069lb▲ U-651M+1,877 lb · +30%

Hydraulics

SpecUTB/Universal 643UTB/Universal U-651MDifference
System TypeOpen centerNot recorded—

Power Take-off (PTO)

SpecUTB/Universal 643UTB/Universal U-651MDifference
Type540/1000Not recorded—

Hitch & Towing

SpecUTB/Universal 643UTB/Universal U-651MDifference
Hitch TypeCategory IIThree-Point Hitch—
Hitch Category3Category 2—
Hitch PositionRearRearSame

Chassis & Drive

SpecUTB/Universal 643UTB/Universal U-651MDifference
Chassis TypeNot recorded4x4 MFWD 4WD—
Drive TypeNot recorded4WD—

Electrical

SpecUTB/Universal 643UTB/Universal U-651MDifference
Starter TypeElectricElectric Starter—

Capacities

SpecUTB/Universal 643UTB/Universal U-651MDifference
Coolant3.7galNot recorded—

Operator Station

SpecUTB/Universal 643UTB/Universal U-651MDifference
TypeOpenNot recorded—

Category context

Both models against the field

Engine Power

median 55 hp
A · 57th percentile (64 hp)B · 59th percentile (65 hp)

Engine Displacement

median 183 ci
A · 60th percentile (219 ci)B · 84th percentile (291 ci)

Cylinders

median 4
A · 50th percentile (4)B · 50th percentile (4)

Forward Gears

median 12
A · 50th percentile (12)B · 39th percentile (10)

Operating Weight

median 5,303 lb
A · 58th percentile (6,192 lb)B · 76th percentile (8,069 lb)
A · 643B · U-651MMedian Utility Tractor
Full spec pageUTB/Universal 643Full spec pageUTB/Universal U-651M