Ariens lawn tractors S-12 vs Kubota F3990

Verdict by the numbers

• The Kubota F3990 is more powerful than the Ariens lawn tractors S-12: 39 HP versus 12 HP (+27 HP, +225%).
• The Kubota F3990 is the more recent model: production started in 2014, versus 1973 for the Ariens lawn tractors S-12.
• The Kubota F3990 is heavier: 778 kg versus 322 kg for the Ariens lawn tractors S-12.
• The Kubota F3990 has the wider mower deck: 60" versus 42".