Childre Nissan Compares 2018 Nissan Altima VS 2018 Infiniti Q50 Near Gray, GA

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2018 Nissan Altima

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2018 Infiniti Q50

Safety Comparison

The Altima has standard Active Head Restraints, which use a specially designed headrest to protect the driver and front passenger from whiplash. During a rear-end collision, the Active Head Restraints system moves the headrests forward to prevent neck and spine injuries. The Q50 doesn’t offer a whiplash protection system.

Both the Altima and the Q50 have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, front seatbelt pretensioners, height-adjustable front shoulder belts, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, rearview cameras, available daytime running lights, blind spot warning systems, rear parking sensors 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 Nissan Altima is safer than the Infiniti Q50:





5 Stars

4 Stars




5 Stars

4 Stars

Neck Injury Risk



Neck Stress

216 lbs.

223 lbs.

Leg Forces (l/r)

32/46 lbs.

185/312 lbs.




4 Stars

3 Stars

Chest Compression

.6 inches

1 inches

Neck Injury Risk



Neck Stress

113 lbs.

145 lbs.

Neck Compression

62 lbs.

85 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 post at 20 MPH, results indicate that the Nissan Altima is safer than the Infiniti Q50:





Into Pole


5 Stars

5 Stars

Max Damage Depth

17 inches

19 inches

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

For its top level performance in all IIHS frontal, side, rear impact and roof-crush tests, with its optional front crash prevention system, and its available headlight’s “Acceptable” rating, the Insurance Institute for Highway Safety grants the Altima its highest rating: “Top Pick Plus” for 2017, a rating granted to only 60 vehicles tested by the IIHS. The Q50 has not been fully tested, yet.

Warranty Comparison

There are over 5 times as many Nissan dealers as there are Infiniti dealers, which makes it much easier should you ever need service under the Altima’s warranty.

Reliability Comparison

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 Altima’s reliability 27 points higher than the Q50.

J.D. Power and Associates rated the Altima third among midsize cars in their 2017 Initial Quality Study. The Q50 isn’t in the top three in its category.

J.D. Power and Associates’ 2017 Initial Quality Study of new car owners surveyed provide the statistics that show that Nissan vehicles are better in initial quality than Infiniti vehicles. J.D. Power ranks Nissan 10th in initial quality, above the industry average. With 14 more problems per 100 vehicles, Infiniti is ranked 23rd, below the industry average.

Fuel Economy and Range Comparison

On the EPA test cycle the Altima 3.5 V6 gets better highway fuel mileage than the Q50 2.0t RWD (32 hwy vs. 30 hwy).

To lower fuel costs and make buying fuel easier, the Nissan Altima uses regular unleaded gasoline. The Q50 requires premium, which can cost 20 to 55 cents more per gallon.

Tires and Wheels Comparison

The Altima has a standard easy tire fill system. When inflating the tires, the vehicle’s integrated tire pressure sensors keep track of the pressure as the tires fill and tell the driver when the tires are inflated to the proper pressure. The Q50 doesn’t offer vehicle monitored tire inflation.

Suspension and Handling Comparison

For better handling and stability, the average track (width between the wheels) on the Altima is 1.7 inches wider in the front and .7 inches wider in the rear than the average track on the Q50.

The Altima 3.5 SL handles at .87 G’s, while the Q50 pulls only .86 G’s of cornering force in a Road and Track skidpad test.

Chassis Comparison

The Nissan Altima may be more efficient, handle and accelerate better because it weighs about 450 to 700 pounds less than the Infiniti Q50.

The front grille of the Altima 2.5 uses electronically controlled shutters to close off airflow and reduce drag when less engine cooling is needed. This helps improve highway fuel economy. The Q50 doesn’t offer active grille shutters.

Passenger Space Comparison

The Altima has .5 inches more front legroom, .8 inches more front hip room, 1 inch more rear legroom and .3 inches more rear shoulder room than the Q50.

Cargo Capacity Comparison

The Altima has a much larger trunk than the Q50 (15.4 vs. 13.2 cubic feet).

The Altima’s standard rear seats fold to accommodate long and bulky cargo. The Q50 Pure/Red Sport 400/Hybrid doesn’t offer folding rear seats.

Economic Advantages Comparison

Insurance will cost less for the Altima owner. The Complete Car Cost Guide estimates that insurance for the Altima will cost $355 to $9790 less than the Q50 over a five-year period.

According to The Car Book by Jack Gillis, the Altima is less expensive to operate than the Q50 because typical repairs cost much less on the Altima than the Q50, including $409 less for a water pump, $222 less for an alternator, $20 less for front brake pads, $84 less for a starter, $74 less for fuel injection, $45 less for a fuel pump, $246 less for front struts, $692 less for a timing belt/chain and $716 less for a power steering pump.

IntelliChoice estimates that five-year ownership costs (depreciation, financing, insurance, fuel, fees, repairs and maintenance) for the Nissan Altima will be $14588 to $24647 less than for the Infiniti Q50.

Recommendations Comparison

Consumer Reports® recommends the Nissan Altima, based on reliability, safety and performance. The Infiniti Q50 isn't recommended.

J.D. Power and Associates rated the Altima first among midsize cars in owner reported satisfaction. This includes how well the vehicle performs and satisfies its owner’s expectations. The Q50 isn’t in the top three.

The Nissan Altima outsold the Infiniti Q50 by over six to one during the 2017 model year.

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