John Deere Equipment Private Ltd offers 425 eng hp Four-Wheel Drive Tractor. John Deere Equipment Private Ltd is ISO 9001:2000 and ISO 14001:2004 certified. The 425 eng hp Four-Wheel Drive Tractor includes John Deere PowerTech ™ Plus engines meet Tier 3 EPA emissions regulations. The 13.5L [824 cu in] Tier 3 engine used in these tractors features improved torque curve. By moving peak torque from 1400 rpm to 1600 rpm, the torque rises quicker for improved engine response to changing loads.