Ski-Doo or Polaris for 2027? A straight comparison of the Summit and RMK mountain sleds, the Patriot 9R against the 850 E-TEC Turbo R, weights, how each brand sells its top models, and which fits Idaho and Oregon riding.
Ski-Doo and Polaris both build excellent mountain sleds, and for most riders the better brand is the one whose strengths match the snow you ride. Ski-Doo’s Summit leans on the 850 E-TEC Turbo R for power that holds at elevation. Polaris’s RMK leans on the naturally aspirated Patriot 9R and a lighter chassis for quick, flickable tree riding.
A word on where we stand: Edge Performance Sports in Ontario, Oregon sells Ski-Doo and Lynx snowmobiles. We do not sell Polaris snowmobiles (we are a Polaris dealer for RANGER, RZR, GENERAL and Sportsman). This comparison uses each manufacturer’s published 2027 specifications, and we say so wherever a number comes from one side only.
Quick answer: is Ski-Doo or Polaris better?
Neither wins outright. Choose Ski-Doo if you ride high elevation and big open climbs, want turbo power that holds up the mountain, or want to buy a top-trim sled off the showroom floor. Choose Polaris if you ride tight trees, value the lightest possible sled and instant throttle response, and are happy to order a top model through Polaris’s preseason SnowCheck program.
Ski-Doo vs Polaris at a glance (2027)
| Ski-Doo Summit | Polaris RMK | |
|---|---|---|
| Chassis | REV Gen5 | Polaris RMK chassis |
| Top engines | 850 E-TEC (165 hp); 850 E-TEC Turbo R (up to 180 hp at elevation) | Patriot 9R (899 cc, naturally aspirated); Patriot Boost (840 cc, turbocharged) |
| Other engines | 600R E-TEC (Summit Adrenaline) | 850 Patriot (RMK SPS, RMK SP); 650 (RMK SP) |
| Published horsepower | Yes, by Ski-Doo | Not published by Polaris |
| Lightest deep-snow example | Summit Expert 850 E-TEC 154: 434 lb dry | PRO RMK 9R 155: 414 lb dry (Polaris estimate) |
| Track lengths | 146, 154, 165 in. | 146, 155, 165 in. |
| How top trims are sold | Spring preorder plus in-season dealer stock | PRO RMK, RMK Khaos and Factory Edition are SnowCheck (preorder) only |
Dry weights are each manufacturer’s own figure and are measured their own way, so treat a 20 lb gap as a guide, not a scale reading.
Patriot 9R vs 850 E-TEC Turbo R: snap against pull
This is the matchup most mountain riders are really asking about.
Polaris Patriot 9R
The 9R is an 899 cc two-stroke with no turbo. Polaris built it around low rotating mass, so the engine spins up and drops back fast. In technical tree riding, where you are on and off the throttle every few seconds to pop the front end over a log or correct a line, that quick response is the whole point. Polaris does not publish a horsepower number for the 9R.
Ski-Doo 850 E-TEC Turbo R
The Turbo R is Ski-Doo’s turbocharged 849 cc two-stroke, rated by Ski-Doo at up to 180 hp at elevation. A naturally aspirated engine loses power as the air thins; the turbo compensates, so the Turbo R keeps pulling on long climbs and high-marking where an unboosted engine has started to fade.
Which engine fits your riding?
- Tight trees, boondocking, frequent stuck-and-recover: the 9R’s response and the RMK’s lower weight favor Polaris.
- Big bowls, long climbs, riding consistently above 7,000 to 8,000 feet: the Turbo R’s held power favors Ski-Doo.
- Want turbo power on a Polaris? That is the Patriot Boost, Polaris’s 840 cc turbo, offered on the PRO RMK and RMK Khaos.
Summit vs RMK: the chassis
Ski-Doo Summit (REV Gen5). For 2027 Ski-Doo trimmed weight from the Summit again. The lineup runs from the Adrenaline (the entry point, with a 600R E-TEC option) through the Edge, X, Expert and HCE trims, and most can be configured with either the 850 E-TEC or the Turbo R. Ski-Doo lists the 2027 Summit Expert 850 E-TEC 154 at 434 lb and the Summit Edge 850 E-TEC 154 at 441 lb dry.
Polaris RMK. Polaris’s mountain range for 2027 is the PRO RMK, RMK Khaos, RMK Factory Edition, the new RMK SPS and the RMK SP. Polaris lists the PRO RMK with the 9R and a 155 in. track at an estimated 414 lb. The RMK SPS is the model to know if you skip the preorder window: it comes in 146, 155 and 165 in. tracks with the 850 or 9R and is sold through the season, with Polaris quoting the 9R RMK SPS at $18,999.
In practice, riders describe the RMK as the narrower, lighter sled that is easier to lay over in trees, and the Summit as the more planted sled on steep, committed climbs. Both are generalizations; a test sit and a demo ride tell you more than any spec table.
Buying: SnowCheck, stock and service
How each brand sells its best sleds. Polaris sells its PRO RMK, RMK Khaos and RMK Factory Edition only through SnowCheck, its spring preorder program. Miss that window and your Polaris choice narrows to the RMK SPS and RMK SP. Ski-Doo also runs a spring preorder, but many Summit configurations also reach dealer floors for the season, so a buyer in the fall can usually still walk in and choose.
What is on our floor in Ontario. Recent Ski-Doo stock has included Summit Edge and Summit Expert 850 E-TEC models, a Summit Adrenaline with the 850 E-TEC Turbo R, Backcountry crossovers, a Tundra and MXZ 200 youth sleds, plus Lynx. See current snowmobile inventory.
Service after the sale. A mountain sled lives on clutch setup, belts and pre-season inspection. Whichever brand you buy, buy it where you will get it serviced. We service Ski-Doo and Lynx in our Ontario shop; schedule service here.
Which should you buy?
- Buy a Ski-Doo Summit if you ride high and open, want the Turbo R’s power at elevation, value Ski-Doo’s published specifications and in-season availability, and want a dealer an hour west of Boise who sells and services it.
- Buy a Polaris RMK if you live in the trees, want the lightest sled and the 9R’s instant response, and can commit to a SnowCheck order for the PRO RMK or Khaos.
Frequently asked questions
Is Ski-Doo or Polaris more reliable?
Neither brand has a clear, published reliability edge. Both have issued snowmobile recalls in recent model years, so check any sled, new or used, against the NHTSA and CPSC recall lookups and ask the dealer for proof that recall work is done. Maintenance history and clutch setup matter more than the badge.
What is the difference between the Polaris 9R and the Ski-Doo 850 Turbo R?
The Polaris Patriot 9R is an 899 cc naturally aspirated two-stroke built for instant throttle response. The Ski-Doo 850 E-TEC Turbo R is a turbocharged 849 cc two-stroke that Ski-Doo rates at up to 180 hp at elevation, built to hold power as the air thins.
Which is lighter, the Summit or the RMK?
By the manufacturers’ own figures, the Polaris PRO RMK 9R 155 (414 lb, estimated) is lighter than the Ski-Doo Summit Expert 850 E-TEC 154 (434 lb). Turbo models on both sides weigh more than their naturally aspirated versions.
Does Polaris make a turbo mountain sled?
Yes. The Patriot Boost is Polaris’s 840 cc turbocharged engine, offered on the PRO RMK and RMK Khaos. It is the Polaris answer to the Ski-Doo Turbo R.
Can I still buy a Polaris PRO RMK if I missed SnowCheck?
Polaris sells the PRO RMK, RMK Khaos and RMK Factory Edition only through SnowCheck, so after that window you would be looking at leftover dealer units or the RMK SPS and RMK SP, which are sold through the season.
Do you sell Polaris snowmobiles?
No. Edge Performance Sports sells Ski-Doo and Lynx snowmobiles and services them in Ontario, Oregon. We sell Polaris off-road vehicles: RANGER, RZR, GENERAL and Sportsman.
Where can I compare Ski-Doo sleds near Boise?
Our Ontario showroom is about an hour west of Boise on I-84 and carries Summit, Backcountry, Tundra and youth Ski-Doo models alongside Lynx. Call ahead and we will have the sleds you want to compare set out.