The 850L incorporates an EPA Tier 4 Final John Deere PSS 9.0L diesel engine that provides a 10 percent increase in horsepower. At 225 hp (168 kW), Deere says that the 850L has more horsepower than any dozer in its size class. Equipped with the popular Eco mode feature, fuel consumption is reduced by up to 20 percent, without sacrificing performance. Auto-idle and idle shutdown are also standard which further minimize fuel costs. Like all John Deere dozers, the 850L features a dual-path hydrostatic transmission, now with 13 percent larger pumps than the K-Series.