David Brown 770 Selematic vs Renault 421 M

10 material differences · fewer than 12

Tractor one

1965–1970

No measured PTO figure

Tractor two

1977–1985

No measured PTO figure

Which should you choose?

Read our verdict on the 770 Selematic and the 421 M → It is generated from the rows below by a fixed, versioned rule set, and names the figure behind every call.

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

David Brown 770 Selematic and Renault 421 M, field by field
Field	770 Selematic	421 M	Gap
Engine
Engine power, claimed claimed	33.0 hp	41.4 hp	+26% 421 M
Engine declared	DAVID BROWN AD 3/49 A (B)	MWM D 325-3	differs
Displacement declared	2.39 L	2.55 L	+7% 421 M
Maximum torque declared	101 lb·ft · 137 N·m	110 lb·ft · 149 N·m	+9% 421 M
Transmission
Top speed declared	15.5 mph · 25 km/h	15.5 mph · 25 km/h	—
Clutch declared	Pedal-operated dry Borg & Beck single-plate clutch	Dry Verto double clutch	differs
Hydraulics & hitch
Pump flow declared	5.4 gpm · 20.4 L/min	6.8 gpm · 25.9 L/min	+27% 421 M
Three-point lift at ends declared	1,598 lb · 725 kg	—	—
Rear PTO speeds declared	540 rpm	540 rpm	—
Weight & dimensions
Unladen weight declared	3,228 lb · 1,464 kg	4,398 lb · 1,995 kg	+36% 421 M
Wheelbase declared	75.0 in · 1,905 mm	78.0 in · 1,982 mm	—
Length declared	112.5 in · 2,858 mm	130.4 in · 3,312 mm	+16% 421 M
Width declared	64.6 in · 1,641 mm	66.1 in · 1,680 mm	—
Height declared	48.0 in · 1,219 mm	93.3 in · 2,370 mm	+94% 421 M
Ground clearance declared	16.5 in · 419 mm	15.7 in · 400 mm	—
Turning radius, braked declared	10.1 ft · 3.07 m	10.9 ft · 3.31 m	+8% 421 M
Fuel tank declared	38.5 qt · 36.4 L	50.7 qt · 48.0 L	+32% 421 M

Source

Source