ATVs have evolved from side-by-side quads to legitimate offroad vehicles in their own right. Polaris aims to make the RZR XP Turbo S the top of the ATV food chain with a complete ground-up redesign. The RZR has specs that would make any 4x4 blush — 72-inch width, 90-inch wheelbase, 25 inches of suspension travel, and huge 32-inch tires all-terrain tires. The chassis is stronger, with critical components like shock mounts and A-arms strengthened for better durability. The RZR rides on Polaris' DYNAMIX Active Suspension system and is powered by the 925cc Prostar turbocharged twin cylinder motor and automatic variable transmission. With a host of serious upgrades, the RZR XP Turbo S makes a case for being one of the best ATVs on the market.