Compare the2027 GMC Terrain VS 2026 Acura RDX

With its standard Enhanced Automatic Emergency Braking, the GMC Terrain is better at preventing collisions with pedestrians than the Acura RDX, according to the Insurance Institute for Highway Safety:

	Terrain	RDX
Overall Evaluation	GOOD	ACCEPTABLE
	Crossing Child - DAY
12 MPH	AVOIDED	AVOIDED
25 MPH	-22 MPH	-16 MPH
	Crossing Adult - NIGHT
12 MPH Brights	AVOIDED	AVOIDED
12 MPH Low beams	AVOIDED	-10 MPH
25 MPH Brights	AVOIDED	AVOIDED
25 MPH Low beams	AVOIDED	-24 MPH
	Parallel Adult - NIGHT
25 MPH Brights	AVOIDED	-23 MPH
25 MPH Low beams	AVOIDED	No Slowing
Warning Issued-Brights	2.4 sec	2.2 sec
37 MPH Low beams	-22 MPH	No Slowing
Warning Issued-Low beams	1.3 sec	No Warning

In a Vehicle-to-Vehicle Frontal Crash Prevention 2.0 test conducted by the Insurance Institute for Highway Safety (IIHS), the GMC Terrain achieved a “Acceptable” rating - the second highest possible - for its performance in forward collision warning and automatic braking systems, demonstrating its excellent capabilities in preventing collisions. The Acura RDX has not been tested.

Both the Terrain and RDX have rear cross-traffic warning, but the Terrain has Rear Cross Traffic Braking (automatically applies the brakes) to better prevent a collision when backing near traffic. The RDX’s Rear Cross Traffic Monitor doesn’t automatically brake.

Both the Terrain and the RDX have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, front seatbelt pretensioners, plastic fuel tanks, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, lane departure warning systems, blind spot warning systems, rearview cameras, rear cross-path warning, available all-wheel drive and around view monitors.

The Terrain’s corrosion warranty is 1 year longer than the RDX’s (6 vs. 5 years).

There are over 6 times as many GMC dealers as there are Acura dealers, which makes it much easier should you ever need service under the Terrain’s warranty.

J.D. Power and Associates’ 2025 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that GMC vehicles are more reliable than Acura vehicles. J.D. Power ranks GMC above average in long-term dependability. With 68 more problems per 100 vehicles in the first three years of ownership, Acura is rated below average.

On the EPA test cycle the Terrain gets better mileage than the RDX:

			MPG
Terrain
	FWD	1.5 turbo 4-cyl.	25 city/28 hwy
	AWD	1.5 turbo 4-cyl.	24 city/28 hwy
		AT4/Denali 1.5 turbo 4-cyl.	24 city/26 hwy
RDX
	AWD	2.0 turbo 4-cyl.	21 city/27 hwy
		A-Spec 2.0 turbo 4-cyl.	21 city/26 hwy

To lower fuel costs and make buying fuel easier, the GMC Terrain uses regular unleaded gasoline. The RDX requires premium for maximum efficiency, which can cost on average about 84.9 cents more per gallon.

In its Green Vehicle Guide, the U.S. Environmental Protection Agency (EPA) rates the GMC Terrain higher (6 out of 10) than the Acura RDX (5). This means the Terrain produces up to 6.9 pounds less smog-producing pollutants than the RDX every 15,000 miles.

The Terrain stops much shorter than the RDX:

	Terrain	RDX
70 to 0 MPH	167 feet	180 feet	Car and Driver
60 to 0 MPH	127 feet	133 feet	Motor Trend

For better maneuverability, the Terrain’s turning circle is 1.8 feet tighter than the RDX’s (37.1 feet vs. 38.9 feet).

The GMC Terrain may be more efficient, handle and accelerate better because it weighs about 350 to 550 pounds less than the Acura RDX.

The Terrain is 6.4 inches shorter than the RDX, making the Terrain easier to handle, maneuver and park in tight spaces.

The front grille of the Terrain uses electronically controlled shutters to close off airflow and reduce drag when less engine cooling is needed. This helps improve highway fuel economy. The RDX doesn’t offer active grille shutters.

The Terrain has 1 inch more front headroom, 2.4 inches more front legroom, .3 inches more front hip room, .9 inches more rear headroom, 1.3 inches more rear legroom and 1.1 inches more rear hip room than the RDX.

The Terrain’s instruments include an oil pressure gauge and a temperature gauge - which could save your engine! Often ‘idiot lights’ don’t warn you until damage has been done. The RDX does not have an oil pressure gauge.

The Terrain has a standard heated steering wheel to take the chill out of steering on extremely cold winter days before the vehicle heater warms up. A heated steering wheel is only available on the RDX Advance.

The Terrain is available in both front-wheel drive and four-wheel drive configurations. The RDX doesn’t offer a two-wheel drive configuration.

The GMC Terrain outsold the Acura RDX by over two to one during 2025.