Kemna Cadillac Compares 2015 Cadillac SRX VS 2015 Lexus RX Near Algona, IA

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2015 Cadillac SRX

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2015 Lexus RX

Safety Comparison

For enhanced safety, the front shoulder belts of the Cadillac SRX are height-adjustable, and the rear seat shoulder belts have child comfort guides to move the belt to properly fit children. A better fit can prevent injuries and the increased comfort also encourages children to buckle up. The Lexus RX Series has only front height-adjustable seat belts.

Both the SRX and RX Series have child safety locks to prevent children from opening the rear doors. The SRX has power child safety locks, allowing the driver to activate and deactivate them from the driver's seat and to know when they're engaged. The RX Series’ child locks have to be individually engaged at each rear door with a manual switch. The driver can’t know the status of the locks without opening the doors and checking them.

Over 200 people are killed each year when backed over by motor vehicles. The SRX offers optional Rear Automatic Braking which use rear sensors to monitor and automatically apply the brakes to prevent a rear collision. The RX Series doesn’t offer backup collision prevention brakes.

The SRX’s optional lane departure warning system alerts a temporarily inattentive driver when the vehicle begins to leave its lane. The RX Series doesn’t offer a lane departure warning system.

To help make backing safer, the SRX’s optional cross-path warning system uses wide-angle radar in the rear bumper to alert the driver to vehicles approaching from the side, helping the driver avoid collisions. The RX Series doesn’t offer a cross-path warning system.

Both the SRX and the RX Series have standard driver and passenger frontal airbags, front side-impact 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 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 Cadillac SRX is safer than the Lexus RX Series:


RX Series



5 Stars

4 Stars

Neck Injury Risk



Neck Compression

26 lbs.

75 lbs.

Leg Forces (l/r)

308/301 lbs.

341/436 lbs.



4 Stars

4 Stars

Chest Compression

.4 inches

.7 inches

Neck Injury Risk



Neck Stress

203 lbs.

205 lbs.

Leg Forces (l/r)

160/264 lbs.

312/397 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, results indicate that the Cadillac SRX is safer than the Lexus RX Series:


RX Series

Front Seat


5 Stars

5 Stars




Chest Movement

.4 inches

.4 inches

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

Warranty Comparison

Cadillac pays for scheduled maintenance on the SRX for 4 years and 50,000 miles. Cadillac will pay for oil changes, lubrication and any other required maintenance. Lexus doesn’t pay scheduled maintenance for the RX Series.

There are almost 8 times as many Cadillac dealers as there are Lexus dealers, which makes it much easier should you ever need service under the SRX’s warranty.

Engine Comparison

The SRX’s 3.6 DOHC V6 produces 38 more horsepower (308 vs. 270) and 17 lbs.-ft. more torque (265 vs. 248) than the RX 350’s standard 3.5 DOHC V6. The SRX’s 3.6 DOHC V6 produces 13 more horsepower (308 vs. 295) than the RX 450h’s standard 3.5 DOHC V6 hybrid.

As tested in Consumer Reports the Cadillac SRX is faster than the RX 350:


RX Series

Zero to 30 MPH

2.7 sec

2.8 sec

Zero to 60 MPH

7.1 sec

7.3 sec

Speed in 1/4 Mile

90.6 MPH

90.4 MPH

Fuel Economy and Range Comparison

To lower fuel costs and make buying fuel easier, the Cadillac SRX uses regular unleaded gasoline. The RX 450h requires premium, which can cost 20 to 55 cents more per gallon.

The SRX has 3.8 gallons more fuel capacity than the RX Series Hybrid’s standard fuel tank (21 vs. 17.2 gallons), for longer range between fill-ups. The SRX has 1.8 gallons more fuel capacity than the RX Series’ standard fuel tank (21 vs. 19.2 gallons).

Brakes and Stopping Comparison

For better stopping power the SRX’s brake rotors are larger than those on the RX Series:


RX Series

Front Rotors

13.6 inches

12.9 inches

Rear Rotors

12.4 inches

12.2 inches

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

The SRX stops much shorter than the RX Series:


RX Series

70 to 0 MPH

173 feet

175 feet

Car and Driver

60 to 0 MPH

128 feet

138 feet

Motor Trend

60 to 0 MPH (Wet)

147 feet

155 feet

Consumer Reports

Tires and Wheels Comparison

For better ride, handling and brake cooling the SRX offers optional 20-inch wheels. The RX Series’ largest wheels are only 19-inches.

The Cadillac SRX’s wheels have 6 lugs for longer wheel bearing life, less chance of rotor warping and greater strength. The Lexus RX Series only has 5 wheel lugs per wheel.

Suspension and Handling Comparison

The SRX offers an optional driver-adjustable suspension system. It allows the driver to choose between an extra-supple ride, reducing fatigue on long trips, or a sport setting, which allows maximum control for tricky roads or off-road. The RX Series’ suspension doesn’t offer adjustable shock absorbers.

For a smoother ride and more stable handling, the SRX’s wheelbase is 2.6 inches longer than on the RX Series (110.5 inches vs. 107.9 inches).

The SRX 4 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 SRX 4 executes Motor Trend’s “Figure Eight” maneuver 1.5 seconds quicker than the RX 450h AWD (27.2 seconds @ .63 average G’s vs. 28.7 seconds @ .57 average G’s).

For greater off-road capability the SRX has a greater minimum ground clearance than the RX 450h (7 vs. 6.9 inches), allowing the SRX to travel over rougher terrain without being stopped or damaged.

Chassis Comparison

The SRX uses computer-generated active noise cancellation to help remove annoying noise and vibration from the passenger compartment, especially at low frequencies. The RX Series doesn’t offer active noise cancellation.

Passenger Space Comparison

The SRX has .7 inches more front headroom, .4 inches more front shoulder room, .7 inches more rear headroom and .2 inches more rear hip room than the RX Series.

Ergonomics Comparison

The SRX’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 RX Series does not have an oil pressure gauge.

While driving with high beams on, sensitive light sensors available for the SRX detect other vehicles which could be blinded and automatically switch to low beams. The RX Series doesn’t offer automatic dimming high beams.

To help drivers see further while navigating curves, the SRX offers optional adaptive headlights to illuminate around corners automatically by reading vehicle speed and steering wheel angle. The RX Series doesn’t offer cornering lights.

Both the SRX and the RX Series offer optional heated front seats. The SRX also offers optional heated rear seats to keep those passengers extremely comfortable in the winter. Heated rear seats aren’t available in the RX Series.

Economic Advantages Comparison

Insurance will cost less for the SRX owner. The Complete Car Cost Guide estimates that insurance for the SRX will cost $355 less than the RX Series over a five-year period.

According to The Car Book by Jack Gillis, the SRX is less expensive to operate than the RX Series because it costs $477 less to do the manufacturer’s suggested maintenance for 50,000 miles. Typical repairs cost much less on the SRX than the RX Series, including $430 less for a water pump, $410 less for a starter, $37 less for fuel injection, $1087 less for a timing belt/chain and $108 less for a power steering pump.

Recommendations Comparison

The SRX was chosen as one of Car and Driver’s “Top Five Trucks” for 3 of the last 11 years. The RX Series has never been a Car and Driver “Top Five Truck” pick.

The Cadillac SRX outsold the Lexus RX Series by over two to one during the 2014 model year.

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