Polaris Unleashes 275 HP RZR Boost
Polaris Unveils 2027 RZR Pro R Boost, Now The Most Powerful Side-by-Side At 275 HP
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Key Points
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There is inconsistency in reported turbocharger size for the Pro R Boost across sources: some outlets cite a 66-millimeter Garrett turbo, while others reference a 60-millimeter Garrett turbo.
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The Pro R Boost delivers 275 horsepower and 223 lb-ft of torque, with a broad usable power band where about 97% of peak torque (roughly 215 lb-ft) is available at 4,000 rpm and torque remains strong from roughly 3,500 to 6,500 rpm.
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Polaris has redesigned substantial driveline and cooling systems to support the boosted power, including a rear-mounted radiator fed by a roof-mounted scoop, revised CVT clutches with a stronger belt and cooling fins, and reinforced half-shafts/front differential.
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Polaris’ XPEDITION updates include a NUMATIX Controlled CVT designed to reduce engine rpm and cabin noise, along with onboard air integration; Apple CarPlay is planned for a future software update, and the model year adds a one-year factory warranty.
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For 2027, Polaris emphasizes refinement over an all-new platform, spotlighting updates to two flagship models (the Pro R Boost and XPEDITION) with an emphasis on ownership experience, technology, and usability enhancements across the lineup.
Polaris has unveiled the 2027 RZR Pro R Boost, a turbocharged side-by-side that pumps out 275 horsepower and 223 lb-ft of torque — making it the most powerful production side-by-side on the market, according to Car and Driver. It starts at $49,999 and goes on sale in November.
The Boost gets its power from a factory-turbocharged 2.0-liter four-cylinder engine called the ProStar Fury, reports UTV Guide. Polaris also updated its XPEDITION model for 2027, adding a brand-new pneumatic CVT system that changes how the transmission works from the ground up, Newsweek reported.
275 Horsepower Engine Built for Heat and Altitude
The ProStar Fury engine uses a Garrett turbocharger — sources differ on the exact size, with some citing 66 millimeters and others 60 millimeters. Either way, the result is 275 horsepower and a broad power band. About 97% of peak torque — roughly 215 lb-ft — hits as low as 4,000 rpm, according to UTV Guide. Usable torque stays strong from around 3,500 to 6,500 rpm.
Polaris engineered the Boost to hold full power even in extreme conditions. A rear-mounted radiator feeds off a roof-mounted air scoop to keep temperatures in check. The CVT clutches were redesigned with stronger belts and cooling fins. Half-shafts and the front differential were both reinforced to handle the added load, Auto Evolution noted.
How the Pro R Boost Stacks Up Against Can-Am and Kawasaki
The 2027 Pro R Boost takes direct aim at rivals like the Can-Am Maverick R and the Kawasaki Teryx H2. Polaris claims an edge in peak torque and a wider usable power band. Both rival machines are already high-powered, but the Boost's 223 lb-ft of torque and its broad delivery window give it a performance advantage across a range of riding conditions, Car and Driver reported.
UTV Guide called the Pro R Boost the most powerful production RZR Polaris has ever built. The model arrives ready for a final drive setup, meaning it is designed for sustained heavy use — not just peak bursts of speed.
XPEDITION Gets a Smarter Transmission and Less Cabin Noise
Polaris is also overhauling the XPEDITION for 2027. The big addition is the NUMATIX Controlled CVT — a system that uses air pressure to manage the transmission. The goal is to lower engine rpm during normal riding. That means a quieter cabin and a smoother ride, Newsweek reported.
The XPEDITION also gains onboard air integration for the 2027 model year. Apple CarPlay is planned but not yet available — Polaris says it will come through a future software update. The updated model also adds a one-year factory warranty, according to UTV Guide.
Polaris Bets on Refinement Over a Whole New Platform
Rather than building an all-new machine, Polaris chose to refine its two flagship models for 2027. The focus is on the ownership experience — better technology, more comfort, and stronger performance from proven platforms. Auto Evolution noted that the 2027 lineup reflects a broader push to improve everyday usability alongside raw horsepower.
The Pro R Boost's $49,999 starting price puts it at the top of the side-by-side market. But Polaris is betting that 275 horsepower, smarter cooling, and a redesigned drivetrain are worth the premium — and that buyers looking for the most powerful machine on the market will agree, Newsweek reported.
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