Every John Deere Tractor Engine Ranked WORST to BEST (You Won't Believe #1)

0:00 A ranking of John Deere tractor engines based on ownership experience, repair costs, and reliability. 1:17 Detroit Diesel six seventy-one 2:49 V8 4:51 DEF engines 7:32 two point nine liter PowerTech three-cylinder 9:26 Tier 3 PowerTech Plus engines 11:04 three hundred and eighty cubic inch diesel 12:27 five hundred and thirty-one cubic inch diesel 14:08 JD14X and the JD18X 15:48 eight point one liter PowerTech 17:22 four hundred and four cubic inch diesel 19:29 two-cylinder 21:38 four hundred and sixty-six cubic inch diesel Which John Deere engine would I trust on a real working farm? I rank twelve of Deere’s most important engines from worst to best, and the number one choice may surprise you. I compare them by ownership experience, repair costs, reliability, serviceability, and how they handle real farm work—not just horsepower. From the Detroit Diesel six seventy-one and the big V8 to the four-oh-four, four sixty-six, two-cylinder, and the newest JD14X and JD18X engines, I explain what makes each one succeed or struggle. I also cover the problems worth checking before buying a used John Deere, including EGR systems, DEF components, sleeve pitting, PTO issues, oil pressure, overhaul costs, and service history. By the end, I’ll explain why one older inline-six earns the top spot.