Nice machine, you will find it very powerful. Much more power than the 3320 I used to own. the turbo engine of the 3520 has the 3320 beat in every way. well worth the extra $$$:thumbsup:
I opted for the 3320 because of fuel economy and no turbo. "Every way"? No, just more HP, they're both the same tractor. Yes, those are the small R4's, Deere has two R4 tires for that tractor, neither is 'correct'.