International Harvester 423 vs International Harvester D-439

Verdict: International Harvester 423 vs International Harvester D-439

The International Harvester 423 and the International Harvester D-439 are both tractors — here is how they stack up on the figures that matter. International Harvester 423 leads on rated power with 40 hp against 39 hp. International Harvester D-439 is the lighter machine (1,584 kg vs 2,015 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. International Harvester 423 is the newer design (1966 vs 1962). In short: choose the International Harvester 423 for outright pulling power, or the International Harvester D-439 if a tighter budget and lighter footprint matter more. Compare the full spec tables below before booking a demo.