John Deere 9R 640 vs John Deere 9RX 770

Verdict: John Deere 9R 640 vs John Deere 9RX 770

The John Deere 9R 640 and the John Deere 9RX 770 are both tractors — here is how they stack up on the figures that matter. John Deere 9RX 770 leads on rated power with 770 hp against 632 hp. John Deere 9R 640 is the lighter machine (21,174 kg vs 33,566 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. John Deere 9RX 770 holds more fuel (1951.9 L vs 1514.0 L) for longer stints between fills. John Deere 9RX 770 is the newer design (2025 vs 2021). In short: choose the John Deere 9RX 770 for outright pulling power, or the John Deere 9R 640 if a tighter budget and lighter footprint matter more. Compare the full spec tables below before booking a demo.