2017 Polaris ACE 150 EFI vs. Polaris RZR 170: By the Numbers

Derrek Sigler
by Derrek Sigler
Comparing Polaris' unique Youth machines

The growing popularity of Youth model ATVs has led to some exciting advancements in what is available for the next generation of off-road enthusiasts. Polaris leads the industry with more models than any other major manufacturer and is the only one with a Youth-sized Side-by-Side in the extremely popular RZR 170. Polaris also sized down the popular ACE model with the introduction of the ACE 150 EFI. These machines are for drivers 10-years of age and older, and are similar to the vehicles the adults enjoy.

Both machines have some similarities, being off-road Youth machines with full-enclosed ROPS systems, steering wheels and seatbelts. So it really comes down to what your youngest drivers want – seating for two, or for one.

Polaris ACE 150 EFIPolaris RZR 170 EFI
Engine149cc 4-Stroke Single Cylinder169cc 4-Stroke Single Cylinder
TransmissionAutomatic PVT F/N/R; ChainAutomatic PVT F/N/R; O-ring Chain
Wheelbase65.0 in65.0 in
Overall Dimensions (LxWxH)85″ x 48″ x 58″85″ x 48″ x 55″
Weight572 lbs (dry)493 lbs (dry)
Front/Rear22 x 7-10/22 x 10-1019 x 7-8/20 x 10-9
Ground Clearance9.0 in6.0 in
Fuel Capacity2.5 gal2.5 gal
Front Suspension/TravelDual A-Arm 5.1″ TravelSingle A-Arm with 5″ Travel
Rear Suspension/TravelSwingarm Dual Shocks with 6″ TravelSwingarm Dual Shocks with 5″ Travel
Brakes4-Wheel Hydraulic Disc4-Wheel Hydraulic Disc

Power and Speed

The Polaris ACE 150 EFI has a single-cylinder, four-stroke, 149cc, electronic fuel injected (EFI) engine that is air and oil cooled. It is two-wheel drive and has forward, neutral and reverse gearing and is chain driven.

The RZR 170 runs on a 169cc 4-Stroke single cylinder, EFI engine that is fan cooled. It is also two-wheel drive, has forward, neutral and reverse gearing and is chain driven.

Polaris RZR 170 Action

Both machines have speed-limiters. From the factory, the ACE is limited to 10 mph. Adults can adjust the top speed, increasing it to 15 mph, 22 mph or 29 mph, as the driver’s skills progress. The RZR comes set at 15mph and can be boosted to 29.

Other safety features for both include LED daytime running lights, a seatbelt, side nets, a whip flag and a parking brake. They both come with DOT-approved helmets and a video explaining safe operation to help reinforce the importance of wearing proper safety gear and learning to drive safely.


The ACE 150 has 5.1 inches of independent front wheel travel with dual A-arms. Out back there is 6.0 inches of rear suspension travel with dual shocks mounted to a swingarm. The smallest ACE has 9.0 inches of ground clearance and large 22-inch tires mounted on 10-inch steel wheels.

Polaris ACE 150 Profile

The RZR 170 offers up 5.0 inches of travel front and rear, with independent A-arms up front and a solid-axle swingarm assembly on the rear. It has 6.0 inches of ground clearance. For rubber, there are 19-inch tires on the front and 20-inch on the rear, both mounted to steel wheels.

Bits and Pieces

The Polaris ACE 150 EFI has ample amount of headroom, a tilt steering wheel and pedals, and a fully adjustable bucket seat. The rear cargo area is rated to hold 50 lbs. The Polaris ACE 150 EFI comes in Indy Red, retails for $3,799.

Polaris RZR 170 Driving

The RZR 170 has seating and seatbelts for two. It has a small, rear cargo area. It is available in Bright White and VooDoo Blue, and retails for $4,799.

For more information, go to www.polaris.com, or visit your local dealer.

Derrek Sigler
Derrek Sigler

Derrek's love for all things ATV started when he was a mere 11 years old, growing up on his family farm. His mom gave him and his sister a choice - get a horse, or a three-wheeler. The sister wanted the horse, and Derrek wanted the ATV. Luckily he won out, and was soon burning up the trails on a Yamaha Tri-Moto 200. By the time he was 14, he had saved enough of his own money by working on the farm and in his folks restaurant to buy a new 4-wheeler. That happened the day he and his mom were driving past the dealership and saw 1987 Banshee. His mom had no idea what he was buying, and he never looked back. He's been riding ever since, and been writing professionally for many years. He has ridden all over North America and been behind the controls of just about every machine out there. And yes, he still has his 1987 Yamaha Banshee.

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