2020 Toyota Sienna vs. 2020 GMC Acadia

Detailed Review, Specifications & Comparison

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Safety

© 1999 - 2020 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2020/07/15

The Sienna has standard Active Headrests, which use a specially designed headrest to protect the driver and front passenger from whiplash. During a rear-end collision, the Active Headrests system moves the headrests forward to prevent neck and spine injuries. The Acadia doesn’t offer a whiplash protection system.

Both the Sienna and the Acadia have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, front seatbelt pretensioners, front wheel drive, height adjustable front shoulder belts, plastic fuel tanks, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights, rearview cameras, available all wheel drive, blind spot warning systems, around view monitors and rear cross-path warning.

The National Highway Traffic Safety Administration does 35 MPH front crash tests on new vehicles. In this test, results indicate that the Toyota Sienna is safer than the GMC Acadia:

Sienna

Acadia

Passenger

STARS

4 Stars

4 Stars

Chest Compression

.3 inches

.6 inches

Neck Injury Risk

35%

37%

Neck Compression

80 lbs.

186 lbs.

New test not comparable to pre-2011 test results. More stars = Better. Lower test results = Better.

The National Highway Traffic Safety Administration does side impact tests on new vehicles. In this test, which crashes the vehicle into a flat barrier at 38.5 MPH and into a post at 20 MPH, results indicate that the Toyota Sienna is safer than the GMC Acadia:

Sienna

Acadia

Front Seat

STARS

5 Stars

5 Stars

HIC

49

106

Chest Movement

.6 inches

.9 inches

Abdominal Force

144 G’s

155 G’s

Rear Seat

STARS

5 Stars

5 Stars

HIC

143

263

Hip Force

746 lbs.

896 lbs.

Into Pole

STARS

5 Stars

5 Stars

Hip Force

586 lbs.

673 lbs.

New test not comparable to pre-2011 test results. More stars = Better. Lower test results = Better.

Warranty

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The Sienna’s corrosion warranty is unlimited miles longer than the Acadia’s (unlimited vs. 100,000 miles).

Toyota pays for scheduled maintenance on the Sienna for 2 years and 25000 miles. Toyota will pay for oil changes, lubrication and any other required maintenance. GMC only pays for the first scheduled maintenance visit on the Acadia.

Reliability

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A reliable vehicle saves its owner time, money and trouble. Nobody wants to be stranded or have to be without a vehicle while it’s being repaired. Consumer Reports rates the Sienna’s reliability 28 points higher than the Acadia.

J.D. Power and Associates rated the Sienna third among minivans in their 2019 Initial Quality Study. The Acadia isn’t in the top three in its category.

J.D. Power and Associates’ 2019 Initial Quality Study of new car owners surveyed provide the statistics that show that Toyota vehicles are better in initial quality than GMC vehicles. J.D. Power ranks Toyota 8th in initial quality, above the industry average. With 4 more problems per 100 vehicles, GMC is ranked 12th, below the industry average.

J.D. Power and Associates’ 2019 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Toyota vehicles are more reliable than GMC vehicles. J.D. Power ranks Toyota second in reliability, above the industry average. With 53 more problems per 100 vehicles, GMC is ranked 22nd.

From surveys of all its subscribers, Consumer Reports’ December 2019 Auto Issue reports that Toyota vehicles are more reliable than GMC vehicles. Consumer Reports ranks Toyota third in reliability. GMC is ranked 22nd.

Engine

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The Sienna’s 3.5 DOHC V6 produces 103 more horsepower (296 vs. 193) and 75 lbs.-ft. more torque (263 vs. 188) than the Acadia’s standard 2.5 DOHC 4-cylinder. The Sienna’s 3.5 DOHC V6 produces 66 more horsepower (296 vs. 230) and 5 lbs.-ft. more torque (263 vs. 258) than the Acadia’s optional 2.0 turbo 4-cylinder.

Fuel Economy and Range

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To lower fuel costs and make buying fuel easier, the Toyota Sienna uses regular unleaded gasoline. The Acadia with the 2.0 turbo 4-cylinder engine requires premium for maximum efficiency, which can cost 20 to 55 cents more per gallon.

Brakes and Stopping

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For better stopping power the Sienna’s front brake rotors are larger than those on the Acadia:

Sienna

Acadia

Front Rotors

12.9 inches

12.6 inches

The Sienna stops shorter than the Acadia:

Sienna

Acadia

60 to 0 MPH

121 feet

126 feet

Motor Trend

Tires and Wheels

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The Sienna L/LE/XLE’s standard tires provide better handling because they have a lower 60 series profile (height to width ratio) that provides a stiffer sidewall than the Acadia’s standard 65 series tires. The Sienna SE’s tires have a lower 50 series profile than the Acadia’s optional 55 series tires.

Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires available on the Sienna can be driven up to 50 miles without any air pressure, allowing you to drive to a service station for a repair. The Acadia doesn’t offer run-flat tires.

Suspension and Handling

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For a smoother ride and more stable handling, the Sienna’s wheelbase is 6.8 inches longer than on the Acadia (119.3 inches vs. 112.5 inches).

For better handling and stability, the track (width between the wheels) on the Sienna is 3.2 inches wider in the front and 3.2 inches wider in the rear than on the Acadia.

For better maneuverability, the Sienna AWD’s turning circle is 1.3 feet tighter than the Acadia’s (37.4 feet vs. 38.7 feet). The Sienna’s turning circle is 1.2 feet tighter than the Acadia’s (37.5 feet vs. 38.7 feet).

Passenger Space

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The Sienna offers optional seating for 8 passengers; the Acadia can only carry up to 7.

The Sienna has 20.6 cubic feet more passenger volume than the Acadia (164.4 vs. 143.8).

The Sienna has 1 inch more front headroom, 2.9 inches more front hip room, 5.6 inches more front shoulder room, .1 inches more rear headroom, 12.8 inches more rear hip room and 5.9 inches more rear shoulder room than the Acadia AT4.

The Sienna has 1 inch more front headroom, 2.9 inches more front hip room, 5.6 inches more front shoulder room, .1 inches more rear headroom, 12.8 inches more rear hip room, 5.9 inches more rear shoulder room, 1.1 inches more third row headroom, 6.6 inches more third row legroom, 7.4 inches more third row hip room and 6.8 inches more third row shoulder room than the Acadia.

For enhanced passenger comfort on long trips the Sienna’s middle and third row seats recline. The Acadia’s third row seats don’t recline.

The front step up height for the Sienna is 1.3 inches lower than the Acadia (16.7” vs. 18”).

Cargo Capacity

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The Sienna’s cargo area provides more volume than the Acadia.

Sienna

Acadia

Behind Third Seat

39.1 cubic feet

12.8 cubic feet

Third Seat Folded

n/a

41.7 cubic feet

Third Seat Removed

87.1 cubic feet

n/a

Second Seat Folded

117.8 cubic feet

79 cubic feet

A low lift-over cargo hatch design makes loading and unloading the Sienna easier. The Sienna’s cargo hatch lift-over height is 23.6 inches, while the Acadia’s liftover is 32 inches.

The Sienna’s cargo area is larger than the Acadia’s in almost every dimension:

Sienna

Acadia AT4

Acadia

Length to seat (3rd/2nd/1st)

23.5”/54”/74”

n.a./48”/83”

18.5”/48”/83”

Max Width

51.5”

50”

50”

Min Width

47.5”

42.5”

42.5”

Height

45”

33”

33”

The Sienna has a standard Split & Stow 3rd Row third row seat, which folds flat into the floor. This completely clears a very large cargo area quickly. The Acadia doesn’t offer seats that fold into the floor.

A standard locking glovebox (which can’t be accessed with the valet key) keeps your small valuables safer in the Sienna. The Acadia doesn’t offer locking storage for small valuables.

Towing

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The Sienna’s standard towing capacity is much higher than the Acadia’s (3500 vs. 1000 pounds).

Ergonomics

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The Sienna’s front and rear power windows all open or close fully with one touch of the switches, making it more convenient at drive-up windows and toll booths, or when talking with someone outside the car. The Acadia’s rear power window switches have to be held the entire time to open them fully. Only its driver’s window closes automatically.

The Sienna has a standard locking fuel door with a remote release located convenient to the driver. A locking fuel door helps prevent vandalism, such as sugar in the tank and fuel theft. The Acadia doesn’t offer a locking fuel door.

The Sienna Limited Premium’s standard wipers adjust their speed and turn on and off automatically according to the amount of rainfall on the windshield. The Acadia’s intermittent wipers change speed with vehicle speed, but can’t turn on and off or change speed based on changing rainfall.

Economic Advantages

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Insurance will cost less for the Sienna owner. The Complete Car Cost Guide estimates that insurance for the Sienna will cost $285 less than the Acadia over a five-year period.

The Sienna will cost the buyer less in the long run because of its superior resale value. The IntelliChoice estimates that the Sienna will retain 45.43% to 52.8% of its original price after five years, while the Acadia only retains 35.93% to 45.86%.

According to The Car Book by Jack Gillis, the Sienna is less expensive to operate than the Acadia because it costs $91 less to do the manufacturer’s suggested maintenance for 50,000 miles. Typical repairs cost much less on the Sienna than the Acadia, including $69 less for a muffler, $128 less for front brake pads, $3 less for front struts and $610 less for a power steering pump.

IntelliChoice estimates that five-year ownership costs (depreciation, financing, insurance, fuel, fees, repairs and maintenance) for the Toyota Sienna will be $697 to $5434 less than for the GMC Acadia.

Recommendations

© 1999 - 2020 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2020/07/15

Consumer Reports® recommends the Toyota Sienna, based on reliability, safety and performance.

© 1991-2018 Advanta-STAR Automotive Research. All rights reserved.

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