WhichTractor
  • Rigid chassis
  • WhichTractor size: Utility
  • No lab test on file
  • 1972–1977
  • 8,031 built

WhichTractor size, not the maker’s category

Renault 421 Engine specs

12 engine values on record for the 421.

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 R7431”, 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.

What engine is in a 421?

A 421 has a MWM D 327-3, a 3-cylinder 2.83 L diesel engine.

Engine — MWM D 327-3 specifications
Make & modelMWM D 327-3Source 2
FuelDieselSource 2
Cylinders3Source 2
Displacement172.5 ci · 2.83 LSource 2
CoolingAir-cooled
Fuel injectionDirect injection method
Maximum torque127 lb·ft · 172 N·m
Maximum torque speed1,500 rpm
Air cleanerLAUTRETTE oil-bath air filter with cyclone separator
Cylinders3
Displacement3.0 qt · 2.8 L
Bore3.7 in · 95 mm
Stroke4.7 in · 120 mm
Rated engine speed2,150 rpm

Source · Traktorenlexikon, “Renault 421 R7431”

Sources and how this page was built

12 engine values from Traktorenlexikon, “Renault 461 R7441”; and Traktorenlexikon, “Renault 421 R7431”.

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 R7431 — CC BY-SA 4.0, WIKIBOOKS-TL-109199 · revision 993344. Wikibooks contributors (Traktorenlexikon). Original document
  2. Traktorenlexikon: Renault 461 R7441 — CC BY-SA 4.0, WIKIBOOKS-TL-84546 · revision 1018674. Wikibooks contributors (Traktorenlexikon). Original document