Certified Benz & Beemer Compares 2012 Acura RDX VS 2012 Lexus RX Near Scottsdale, AZ

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2012 Acura RDX

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2012 Lexus RX

Safety Comparison

Using vehicle speed sensors and seat sensors, smart airbags in the RDX deploy with different levels of force or don’t deploy at all to help better protect passengers of all sizes in different collisions. The RDX’s side airbags will shut off if a child is leaning against the door. The RX Series’ side airbags don’t have smart features and will always deploy full force.

Both the RDX and the RX Series have standard driver and passenger frontal airbags, front side-impact airbags, 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 and available all wheel drive.

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


RX Series



5 Stars

5 Stars

Head Injury Index



Chest forces

40 g’s

41 g’s



5 Stars

5 Stars

Chest forces

37 g’s

45 g’s

More stars indicate a better overall result. Lower numbers indicate better individual test results.

Warranty Comparison

There are over 37 percent more Acura dealers than there are Lexus dealers, which makes it easier to get service under the RDX’s warranty.

Reliability Comparison

A reliable vehicle saves its owner time, money and trouble. Nobody wants to be stranded or have to be without their vehicle while it’s being repaired. Consumer Reports predicts that the RDX’s reliability will be 12% better than the Lexus RX Series and 37% better than the Lexus RX Series Hybrid.

J.D. Power and Associates rated the RDX second among entry premium crossover/SUV’s in their 2011 Initial Quality Study. The RX Series was rated third in its category.

Engine Comparison

The RDX’s 2.3 turbo 4 cyl. produces 12 lbs.-ft. more torque (260 vs. 248) than the RX 350’s standard 3.5 DOHC V6.

As tested in Motor Trend the Acura RDX is faster than the Lexus RX Series:


RX 350

RX 450h

Zero to 60 MPH

6.5 sec

6.8 sec

6.9 sec

Quarter Mile

15.1 sec

15.3 sec

15.2 sec

Brakes and Stopping Comparison

The RDX stops shorter than the RX Series:


RX Series

60 to 0 MPH

134 feet

138 feet

Motor Trend

60 to 0 MPH (Wet)

145 feet

155 feet

Consumer Reports

Tires and Wheels Comparison

The RDX’s tires provide better handling because they have a lower 55 series profile (height to width ratio) that provides a stiffer sidewall than the RX Series’ standard 60 series tires.

Suspension and Handling Comparison

The RDX SH-AWD™ handles at .84 G’s, while the RX 350 AWD pulls only .76 G’s of cornering force in a Car and Driver skidpad test.

The RDX SH-AWD™ executes Motor Trend’s “Figure Eight” maneuver 1 seconds quicker than the RX 450h AWD (27.7 seconds @ .62 average G’s vs. 28.7 seconds @ .57 average G’s).

Chassis Comparison

The Acura RDX may be more efficient, handle and accelerate better because it weighs about 450 to 700 pounds less than the Lexus RX Series.

The RDX is 5.3 inches shorter than the RX Series, making the RDX easier to handle, maneuver and park in tight spaces.

As tested by Car and Driver while cruising at 70 MPH, the interior of the RDX SH-AWD™ is quieter than the RX 350 AWD (69 vs. 70 dB).

Passenger Space Comparison

The RDX has .2 inches more front shoulder room, .6 inches more rear headroom and .9 inches more rear legroom than the RX Series.

Cargo Capacity Comparison

A low lift-over cargo hatch design makes loading and unloading the RDX easier. The RDX’s cargo hatch lift-over height is 29 inches, while the RX Series’ liftover is 30.9 inches.

Ergonomics Comparison

The RDX’s speed-sensitive wipers speed up when the vehicle does, so that the driver doesn’t have to continually adjust the speed of the wipers. The RX Series’ standard manually variable intermittent wipers have to be constantly adjusted.

Economic Advantages Comparison

Insurance will cost less for the RDX owner. The Complete Car Cost Guide estimates that insurance for the RDX will cost $965 to $2900 less than the RX Series over a five-year period.

According to The Car Book by Jack Gillis, the RDX is less expensive to operate than the RX Series because it costs $448 less to do the manufacturer’s suggested maintenance for 50,000 miles. Typical repairs cost much less on the RDX than the RX Series, including $310 less for an alternator, $225 less for front brake pads, $446 less for fuel injection, $1301 less for a fuel pump, $1596 less for front struts and $296 less for a timing belt/chain.

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