WhichTractor
  • Rigid chassis
  • WhichTractor size: Utility
  • No lab test on file
  • 1977–1985
  • 3,196 built

WhichTractor size, not the maker’s category

Derived by WhichTractor from a sourced three-point linkage. How we decide what a machine is

Renault 421M specs: hp, weight, years

MWM D 325-3 three-cylinder diesel. The manufacturer claimed 41.4 horsepower. No laboratory has tested one, so there is no measured figure at the shaft.

Engine power, claimed · gross or net not stated

41.4 hp

30.9 kW as stated by the source

No lab test on file

Claimed · standard not stated by the source

Source · Traktorenlexikon, “Renault 421 M / R 7421”, claimed

This is the maker’s own figure, measured at the engine. Power at the PTO is lower — by how much, for this machine, nobody has measured.

Weight
4,398 lb
Hyd. flow
6.8 gpm
Top speed
15.5 mph

Renault 421M specs: key facts

  • The Renault 421M was built from 1977 to 1985.

  • The Renault 421M has a claimed engine power (gross or net not stated) of 30.9 kW (41.4 hp); it has no measured PTO figure.

  • The Renault 421M is two-wheel drive (2WD).

  • The Renault 421M has a MWM D 325-3 engine, a 3-cylinder 2.55 L diesel unit.Source 2

  • The Renault 421M weighs 1,995 kg (4,398 lb) unladen.

  • The Renault 421M has an independent rear PTO running at 540 rpm.

  • The hydraulic pump of the Renault 421M delivers 25.9 L/min (6.8 gpm).

Source · Traktorenlexikon, “Renault 421 M / R 7421”

Illustration of the 1977–1985 Renault 421 M, a 41 hp farm tractor, a drawing generated from its specification record
Illustration — not a photograph

How much horsepower does a 421M have?

The only figure for the 421M is 41.4 hp (30.9 kW) of claimed engine power, gross or net not stated, no test standard stated — not power at the shaft.

Engine, claimed (gross/net not stated)
41.4 hp

Source · Traktorenlexikon, “Renault 421 M / R 7421”

What engine is in a 421M?

A 421M has an MWM D 325-3, a 3-cylinder 2.55 L diesel engine.

Engine — 421M engine specifications
Make & modelMWM D 325-3Source 2
Cylinders3, air-cooledSource 2
Displacement155.7 ci · 2.55 LSource 2
Max torque110 lb·ft · 149 N·m @ 1,583 rpm
InjectionDirect injection
Electrical system12 V

Source · Traktorenlexikon, “Renault 421 M / R 7421”

How much will a 421M lift, and what is its hydraulic flow?

Hydraulic and PTO specifications for the 421M are below.

Hydraulics & PTO — 421M hydraulics and PTO specifications
Pump flow6.8 gpm · 25.9 L/min
Hitch categoryCategory 1
Rear PTOIndependent, engine-driven, 540 rpm @ 1,581 engine rpm
PTO shaft1 3/8" - 6 splines

Source · Traktorenlexikon, “Renault 421 M / R 7421”

What transmission does a 421M have?

Transmission specifications for the 421M are below.

Transmission — 421M transmission specifications
ClutchDry Verto double clutch
BrakesPedal operated Girling disc brake acting on half axles
SteeringMechanical Gemmer steering type 65
Top speed15.5 mph · 25 km/h

Source · Traktorenlexikon, “Renault 421 M / R 7421”

How much does a 421M weigh?

A 421M weighs 4,398 lb (1,995 kg) unladen.

Weights & dimensions — 421M weights and dimensions
Unladen weight4,398 lb · 1,995 kg
Wheelbase78.0 in · 1,982 mm
Length130.4 in · 3,312 mm
Width66.1–83.9 in · 1,680–2,130 mm
Height93.3 in · 2,370 mm
Ground clearance15.7 in · 400 mm
Front track47.2–74.8 in · 1,200–1,900 mm
Rear track51.2–70.9 in · 1,300–1,800 mm
Turning radius, braked10.9 ft · 3.31 m

Source · Traktorenlexikon, “Renault 421 M / R 7421”

What oil does a 421M take, and how much?

A 421M engine takes 8.7 qt (8.25 L). Single source, not independently verified — always confirm against the operator’s manual for your machine.

421M fluid capacities, grades and service intervals
SystemCapacity
Engine oil8.7 qt · 8.25 LSource: Traktorenlexikon, “Renault 421 M / R 7421” · single source, not independently verified
Transmission & hydraulic28.0 qt · 26.5 LSource: Traktorenlexikon, “Renault 421 M / R 7421” · single source, not independently verified

Always confirm against the operator’s manual for your machine before service.

Which tractors compare with a 421M?

Within 10% of its 41.4 hp of claimed engine power, the same type, and first built within 15 years of it.

Common questions about the Renault 421M

Is a 421M two-wheel drive or four-wheel drive?

The Renault 421M is two-wheel drive (2WD).

What PTO does a 421M have?

A 421M has a independent 540 rpm rear PTO on a 1 3/8" - 6 splines shaft.

Sources and how this page was built

Compiled from Traktorenlexikon, “Renault 421 M / R 7421”; and Traktorenlexikon, “Renault 60 R7253”.

Sources checked

14 SEP 2026

Spotted an error?

Sources

Facts taken from these documents, units converted. Numbers beside a figure refer to this list. Licences and attribution

  1. Traktorenlexikon: Renault 421 M / R 7421 — CC BY-SA 4.0, WIKIBOOKS-TL-109128 · revision 993345. Wikibooks contributors (Traktorenlexikon). Original document
  2. Traktorenlexikon: Renault 60 R7253 — CC BY-SA 4.0, WIKIBOOKS-TL-79816 · revision 1068193. Wikibooks contributors (Traktorenlexikon). Original document