The Turbo R doesn't possess the same power and speed capabilities as the Pro R, but this UTV is plenty quick and has the same great suspension for rugged terrains. If rock crawling and retaining a lower budget is a priority, the Turbo R may be a better fit for your needs.

McArdle explains that due to the turbocharger, the Turbo R gets a great mid-band power delivery setup. Without a turbo, the Pro R gets more of an instant power delivery, which makes low-rpm throttle more sensitive, depending on throttle mode. Throttle modes include Sport, Tock, and Race.

Purpose-built and ready to go straight from the factory, the RZR Turbo R 4 Sport offers 181 HP, MaxLink Suspension, vented 1/4 doors, 4-pt harnesses, tilt steering and LED lights that set you and the crew up for the ride ahead.

225 hp The 2.0-liter ProStar Fury engine is the same you'll find in the Polaris Slingshot but turned up even more. It makes 225 hp in the RZR Pro R at 8,250 rpm, just shy of its ear-ringing redline of 8,500 rpm. That oomph is sent through a continuously variable transmission to either the rear wheels or all four.

90 mph POWER. The Pro R is powered by their new naturally- aspirated ProStar Fury 2.0L, four-cylinder motor that pushes out a whopping 225 hp and a top speed of 90 mph.

181 HP Get power-on-demand from this 181 HP 4-stroke DOHC twin-cylinder turbocharged machine delivering intense corner-to-corner acceleration. And when low and slow is what you need when coming across technical terrain, RZR Turbo R offers plenty of low gear to crawl over obstacles.

90 mph POWER. The Pro R is powered by their new naturally- aspirated ProStar Fury 2.0L, four-cylinder motor that pushes out a whopping 225 hp and a top speed of 90 mph.

90 mph The machine can run all the way up to 90 mph. That makes it the fastest production side-by-side we've tested to date.

The machine can run all the way up to 90 mph.

Gets 181 horsepower from a turbocharged, 1,000cc parallel twin; Has 28 inches of suspension travel; Second only to the top-dog RZR Pro R for desert prowess in the Polaris lineup; Can be had with the excellent Dynamix DV active suspension.

Both RZRs feature the same proven 181-horsepower engine, CVT transmission, and front and rear differentials with the Turbo R getting a revised lower low range in the gearbox. On paper, drag-race results favor the lighter, 2056-pound and 32-inch-tire-diameter Pro XP 4 over the 2286-pound Turbo R with 35s.

Due to factory-imposed limitations, the ECU of a stock Polaris RZR Turbo governs the top speed to 85 MPH.