John Deere 4040S vs John Deere 6510S

Verdict: John Deere 4040S vs John Deere 6510S

The John Deere 4040S and the John Deere 6510S are both tractors — here is how they stack up on the figures that matter. John Deere 4040S leads on rated power with 115 hp against 114 hp. John Deere 4040S is the lighter machine (5,021 kg vs 8,152 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. John Deere 6510S holds more fuel (165.0 L vs 140.0 L) for longer stints between fills. John Deere 6510S is the newer design (1999 vs 1981). In short: choose the John Deere 4040S for outright pulling power, or the John Deere 6510S if a tighter budget and lighter footprint matter more. Compare the full spec tables below before booking a demo.