John Deere 4520 John Deere 4520 Price, Reviews, Specs: John Deere 4520 Row Crop Tractor is equipped with a John Deere turbocharged diesel 6-cylinder liquid-cooled inline 404 ci [6.6 L] engine, which delivers 107 hp (79.8 kW) power at rated rpm 2200. It was the first Deere Row Crop tractor with a factory-installed turbocharger. Early versions suffered serious problems with the … [Read more...] about John Deere 4520 Price, Specs, Reviews & Attachments