Compare the2025 Toyota Crown SigniaVS 2025 Acura RDX

For enhanced safety, the front and rear seat shoulder belts of the Toyota Crown Signia have pretensioners to tighten the seatbelts and eliminate dangerous slack in the event of a collision and force limiters to limit the pressure the belts will exert on the passengers. The Acura RDX doesn’t offer pretensioners for its rear seat belts.

In the past twenty years hundreds of infants and young children have died after being left in vehicles, usually by accident. When turning the vehicle off, drivers of the Crown Signia are reminded to check the back seat if they opened the rear door before starting out. The RDX doesn’t offer a back seat reminder.

The Crown Signia has standard Whiplash Injury Lessening Seats, which use a specially designed seat to protect the driver and front passenger from whiplash. During a rear-end collision, the Whiplash Injury Lessening Seats system allows the backrest to travel backwards to cushion the occupants and the headrests move forward to prevent neck and spine injuries. The RDX doesn’t offer a whiplash protection system.

With its standard Pre-Collision System with Pedestrian Detection, the Toyota Crown Signia is better at preventing collisions with pedestrians than the Acura RDX, according to the Insurance Institute for Highway Safety:

	Crown Signia	RDX
Overall Evaluation	GOOD	ACCEPTABLE
	Crossing Child - DAY
12 MPH	AVOIDED	AVOIDED
25 MPH	AVOIDED	-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
37 MPH Brights	AVOIDED	-31 MPH
37 MPH Low beams	AVOIDED	No Slowing
Warning Issued-Low beams	1.9 sec	No Warning

In a Vehicle-to-Vehicle Frontal Crash Prevention 2.0 test conducted by the Insurance Institute for Highway Safety (IIHS), the Toyota Crown Signia achieved a “Good” rating - the 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.

The Crown Signia has a standard Secondary Collision Brake, which automatically applies the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The RDX doesn’t offer a post collision braking system: in the event of a collision that triggers the airbags, more collisions are possible without the protection of airbags that may have already deployed.

Over 200 people are killed each year when backed over by motor vehicles. The Crown Signia Limited offers an optional Parking Support Brake that uses rear sensors to monitor for objects to the rear and automatically applies the brakes to prevent a collision. The RDX doesn’t offer backup collision prevention brakes.

Both the Crown Signia and RDX have rear cross-traffic warning, but the Crown Signia Limited offers optional Parking Support Brake (automatically applies the brakes) to better prevent a collision when backing near traffic. The RDX’s Rear Cross Traffic Monitor doesn’t automatically brake.

The Crown Signia’s driver alert monitor detects an inattentive driver then sounds a warning and suggests a break. According to the NHTSA, drivers who fall asleep cause about 100,000 crashes and 1500 deaths a year. The RDX doesn’t offer a driver alert monitor.

Both the Crown Signia and the RDX have standard driver and passenger frontal airbags, front side-impact airbags, driver and front passenger knee airbags, side-impact head airbags, height adjustable front shoulder belts, four-wheel antilock brakes, all wheel drive, 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 and available around view monitors.

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

	Crown Signia	RDX
OVERALL STARS	5 Stars	4 Stars
	Driver
STARS	4 Stars	4 Stars
HIC	136	300
Neck Stress	248 lbs.	262 lbs.
Neck Compression	16 lbs.	23 lbs.
	Passenger
STARS	5 Stars	4 Stars
HIC	179	353
Chest Compression	.6 inches	.6 inches
Neck Injury Risk	26.1%	30%
Neck Compression	31 lbs.	84 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 Crown Signia is safer than the Acura RDX:

	Crown Signia	RDX
	Front Seat
STARS	5 Stars	5 Stars
HIC	32	63
Abdominal Force	130 lbs.	130 lbs.
	Into Pole
STARS	5 Stars	5 Stars
HIC	293	486
Spine Acceleration	36 G’s	39 G’s

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

Toyota pays for scheduled maintenance on the Crown Signia for 1 year and 13000 miles longer than Acura pays for maintenance for the RDX (2/25000 vs. 1/12000).

There are almost 5 times as many Toyota dealers as there are Acura dealers, which makes it much easier should you ever need service under the Crown Signia’s warranty.

The battery on the Crown Signia is in the trunk, which protects it from hot underhood temperatures that can degrade battery life. By keeping the Crown Signia’s battery 20 to 30 degrees cooler, its life is increased by years. The RDX’s battery is in the hot engine compartment.

J.D. Power and Associates’ 2024 Initial Quality Study of new car owners surveyed provide the statistics that show that Toyota vehicles are better in initial quality than Acura vehicles. J.D. Power ranks Toyota above average in initial quality. With 1 more problems per 100 vehicles, Acura is rated lower.

J.D. Power and Associates’ 2024 survey of the owners of three-year-old vehicles provides the statistics that show that Toyota vehicles are more reliable than Acura vehicles. J.D. Power ranks Toyota second in reliability, above the industry average. With 69 more problems per 100 vehicles, Acura is ranked 20th.

From surveys of all its subscribers, Consumer Reports’ March 2025 Auto Issue reports that Toyota vehicles are more reliable than Acura vehicles. Consumer Reports ranks Toyota third in overall reliability. Acura is ranked fifth.

As tested in Motor Trend the Toyota Crown Signia is faster than the Acura RDX:

	Crown Signia	RDX
Zero to 60 MPH	6.9 sec	7.1 sec
Quarter Mile	15.2 sec	15.5 sec
Speed in 1/4 Mile	92.6 MPH	90.7 MPH

On the EPA test cycle the Crown Signia gets better mileage than the RDX:

			MPG
Crown Signia
		2.5 4-cyl. Hybrid	39 city/37 hwy
RDX
		2.0 turbo 4-cyl.	21 city/27 hwy
		A-Spec 2.0 turbo 4-cyl.	21 city/26 hwy

Regenerative brakes improve the Crown Signia’s fuel efficiency by converting inertia back into energy instead of wasting it. The RDX doesn’t offer a regenerative braking system.

To lower fuel costs and make buying fuel easier, the Toyota Crown Signia 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 Toyota Crown Signia higher (6 out of 10) than the Acura RDX (5). This means the Crown Signia produces up to 6.9 pounds less smog-producing pollutants than the RDX every 15,000 miles.

The Crown Signia has a standard continuously variable transmission (CVT). With no “steps” between gears, it can keep the engine at the most efficient speed for fuel economy, or keep it at its peak horsepower indefinitely for maximum acceleration. The RDX doesn’t offer a CVT.

For better stopping power the Crown Signia’s brake rotors are larger than those on the RDX:

	Crown Signia	RDX
Front Rotors	12.9 inches	12.4 inches
Rear Rotors	12.5 inches	12.2 inches

The Crown Signia’s standard front and rear disc brakes are vented to help dissipate heat for shorter stops with less fading. The rear discs on the RDX are solid, not vented.

The Crown Signia stops much shorter than the RDX:

	Crown Signia	RDX
60 to 0 MPH	116 feet	133 feet	Motor Trend

For better ride, handling and brake cooling the Crown Signia Limited has standard 21-inch wheels. The RDX’s largest wheels are only 20-inches.

For a smoother ride and more stable handling, the Crown Signia’s wheelbase is 3.9 inches longer than on the RDX (112.2 inches vs. 108.3 inches).

The Crown Signia Limited handles at .82 G’s, while the RDX pulls only .81 G’s of cornering force in a Motor Trend skidpad test.

The Crown Signia Limited executes Motor Trend’s “Figure Eight” maneuver quicker than the RDX (27.3 seconds @ .67 average G’s vs. 27.7 seconds @ .62 average G’s).

The Crown Signia has .5 inches more front legroom and .6 inches more rear headroom than the RDX.

The Crown Signia’s standard towing capacity is much higher than the RDX’s (2700 vs. 1500 pounds).

The Crown Signia’s standard Smart Key System allow you to unlock the doors from any outside door handle, open the cargo door, and start the engine, all without removing the key from the pocket or purse. Smart Entry standard on the RDX doesn’t offer a sensor on the rear doors, so you’ll have to reach a front handle to unlock the rear door.

The Toyota Crown Signia has power folding mirrors that offer unparalleled convenience while maneuvering in tight places or parked. With the mirrors folded it’s easier to walk past and help prevent parking damage. The mirrors can be quickly unfolded when the driver is ready to leave. Power folding mirrors are only offered on the RDX Advance.

The Crown Signia 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.