John Deere 2520

John Deere 3.6L 4-cyl diesel

Bore × stroke

4.02 in × 4.33 in

Rated speed

2,500 rpm

Compression

16.7:1

Cooling

liquid-cooled inline

Firing order

1-3-4-2

John Deere 3.3L 4-cyl gasoline

Bore × stroke

3.86 in × 4.33 in

Rated speed

2,500 rpm

Compression

7.6:1

Cooling

liquid-cooled inline

Firing order

1-3-4-2

John Deere Syncro-Range: Four shift stations with two forward gears each plus reverse gear in some stations. Shifts between gears within a station are synchronized. Tractor must be stopped to shift between stations.