2020 Lexus IS Series vs. 2020 Mazda 6

Detailed Review, Specifications & Comparison

Your buying experience includes...

business_centerProfessional Staff
account_balanceSimple Financing
local_gas_stationFull Tank of Gas
local_car_washFree Car Wash

Safety

© 1999 - 2020 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2020/05/30

For enhanced safety, the front and rear seat shoulder belts of the Lexus IS Series 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 Mazda 6 doesn’t offer pretensioners for the rear seat belts.

The IS Series’ optional pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The Mazda 6 doesn’t offer pre-crash pretensioners.

The IS Series offers all-wheel drive to maximize traction under poor conditions, especially in ice and snow. The Mazda 6 doesn’t offer all-wheel drive.

Both the IS Series and the Mazda 6 have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, height adjustable front shoulder belts, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, lane departure warning systems, rearview cameras, available 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 Lexus IS Series is safer than the Mazda 6:

IS Series

Mazda 6

Passenger

STARS

4 Stars

4 Stars

Neck Compression

64 lbs.

107 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 Lexus IS Series is safer than the Mazda 6:

IS Series

Mazda 6

Front Seat

STARS

5 Stars

5 Stars

HIC

99

154

Chest Movement

.9 inches

1.1 inches

Abdominal Force

193 G’s

256 G’s

Rear Seat

STARS

5 Stars

5 Stars

HIC

89

356

Spine Acceleration

33 G’s

64 G’s

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

Warranty

© 1999 - 2020 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2020/05/30

The IS Series comes with a full 4-year/50,000-mile basic warranty, which covers the entire car and includes 24-hour roadside assistance. The 6’s 3-year/36,000-mile basic warranty expires 1 year and 14,000 miles sooner.

Lexus’ powertrain warranty covers the IS Series 1 year and 10,000 miles longer than Mazda covers the 6. Any repair needed on the engine, transmission, axles, joints or driveshafts is fully covered for 6 years or 70,000 miles. Coverage on the Mazda 6 ends after only 5 years or 60,000 miles.

The IS Series’ corrosion warranty is 1 year longer than the Mazda 6’s (6 vs. 5 years).

Reliability

© 1999 - 2020 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2020/05/30

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 IS Series’ reliability 31 points higher than the Mazda 6.

J.D. Power and Associates’ 2019 Initial Quality Study of new car owners surveyed provide the statistics that show that Lexus vehicles are better in initial quality than Mazda vehicles. J.D. Power ranks Lexus 8th in initial quality, above the industry average. With 4 more problems per 100 vehicles, Mazda is ranked 12th, below the industry average.

J.D. Power and Associates’ 2019 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Lexus vehicles are more reliable than Mazda vehicles. J.D. Power ranks Lexus first in reliability, above the industry average. With 53 more problems per 100 vehicles, Mazda is ranked 21st.

From surveys of all its subscribers, Consumer Reports’ December 2019 Auto Issue reports that Lexus vehicles are more reliable than Mazda vehicles. Consumer Reports ranks Lexus first in reliability. Mazda is ranked second.

Engine

© 1999 - 2020 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2020/05/30

The IS Series has more powerful engines than the Mazda 6:

Horsepower

Torque

IS 300 2.0 turbo 4-cylinder

241 HP

258 lbs.-ft.

IS 300 AWD 3.5 DOHC V6

260 HP

236 lbs.-ft.

IS 350 3.5 DOHC V6

311 HP

280 lbs.-ft.

Mazda 6 2.5 DOHC 4-cylinder

187 HP

186 lbs.-ft.

Mazda 6 Grand Touring/Signature 2.5 turbo 4-cylinder

250 HP

310 lbs.-ft.

As tested in Motor Trend the IS 300 2.0 turbo 4-cylinder is faster than the Mazda 6 4 cyl.:

IS Series

Mazda 6

Zero to 30 MPH

2.4 sec

2.6 sec

Zero to 60 MPH

7 sec

7.7 sec

Zero to 80 MPH

12.2 sec

13.2 sec

Passing 45 to 65 MPH

3.7 sec

4 sec

Quarter Mile

15.4 sec

16 sec

Speed in 1/4 Mile

89.9 MPH

87.9 MPH

Fuel Economy and Range

© 1999 - 2020 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2020/05/30

The IS Series has a gallon more fuel capacity than the Mazda 6 (17.4 vs. 16.4 gallons), for longer range between fill-ups.

Transmission

© 1999 - 2020 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2020/05/30

An eight-speed automatic is standard on the Lexus IS Series, for better acceleration and lower engine speed on the highway. Only a six-speed automatic is available for the Mazda 6.

Brakes and Stopping

© 1999 - 2020 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2020/05/30

For better stopping power the IS Series’ brake rotors are larger than those on the Mazda 6:

IS Series

Mazda 6

Mazda 6 Grand Touring/Signature

Front Rotors

13.1 inches

11.7 inches

12.6 inches

Rear Rotors

12.2 inches

10.9 inches

10.9 inches

The IS Series’ standard front and rear disc brakes are vented to help dissipate heat for shorter stops with less fading. The rear discs on the Mazda 6 are solid, not vented.

The IS Series stops much shorter than the Mazda 6:

IS Series

Mazda 6

70 to 0 MPH

177 feet

184 feet

Car and Driver

60 to 0 MPH

111 feet

124 feet

Motor Trend

Tires and Wheels

© 1999 - 2020 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2020/05/30

The IS Series’ standard tires provide better handling because they have a lower 45 series profile (height to width ratio) that provides a stiffer sidewall than the Mazda 6 Sport’s standard 55 series tires. The IS Series’ optional 225/40R18 front and 255/35R18 rear tires have a lower 40 series front and 35 series rear profile than the Mazda 6 Touring/Grand Touring/Signature’s 45 series tires.

Suspension and Handling

© 1999 - 2020 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2020/05/30

The IS Series 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. The Mazda 6’s suspension doesn’t offer adjustable shock absorbers.

The IS Series AWD handles at .89 G’s, while the Mazda 6 Grand Touring pulls only .82 G’s of cornering force in a Motor Trend skidpad test.

The IS 350 AWD executes Motor Trend’s “Figure Eight” maneuver 1.6 seconds quicker than the Mazda 6 Touring (26 seconds @ .72 average G’s vs. 27.6 seconds @ .62 average G’s).

For better maneuverability, the IS Series’ turning circle is 2.5 feet tighter than the Mazda 6’s (34.2 feet vs. 36.7 feet). The IS Series AWD’s turning circle is 1.3 feet tighter than the Mazda 6’s (35.4 feet vs. 36.7 feet).

Chassis

© 1999 - 2020 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2020/05/30

The IS Series is 8.4 inches shorter than the Mazda 6, making the IS Series easier to handle, maneuver and park in tight spaces.

As tested by Car and Driver, the interior of the IS 350 F Sport is quieter than the Mazda 6 Grand Touring:

IS Series

Mazda 6

At idle

42 dB

42 dB

Full-Throttle

73 dB

80 dB

70 MPH Cruising

65 dB

69 dB

Passenger Space

© 1999 - 2020 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2020/05/30

The IS Series has 2.6 inches more front legroom, .8 inches more front hip room and .5 inches more rear hip room than the Mazda 6.

Cargo Capacity

© 1999 - 2020 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2020/05/30

With its sedan body style, valet key, locking rear seatbacks and remote trunk release lockout, the IS Series offers cargo security. The Mazda 6’s non-lockable remote release defeats cargo security.

A standard locking glovebox (which can’t be accessed with the valet key) keeps your small valuables safer in the IS Series. The Mazda 6 doesn’t offer locking storage for small valuables.

Servicing Ease

© 1999 - 2020 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2020/05/30

The IS Series uses gas struts to support the hood for easier service access. The Mazda 6 uses a prop rod to support its heavy hood. It takes two hands to open the hood and set the prop rod, the prop rod gets in the way during maintenance and service, and the prop rod could be knocked out, causing the heavy hood to fall on the person maintaining or servicing the car.

The engine in the IS Series is mounted longitudinally (North-South), instead of sideways, as in the Mazda 6. This makes it easier to service and maintain, because the accessory belts are in front.

The IS Series has a maintenance free battery for long life without checking the battery’s water level. The Mazda 6 doesn’t have a maintenance free battery, so the water level in the battery’s cells must be checked often to prevent damage.

J.D. Power and Associates surveys of service recipients show that Lexus service is better than Mazda. J.D. Power ranks Lexus second in service department satisfaction. With a 70% lower rating, Mazda is ranked 25th.

Ergonomics

© 1999 - 2020 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2020/05/30

Unlike the driver-only memory seat in the Mazda 6 Grand Touring Reserve/Signature, the IS Series offers an optional driver and passenger memory, so that when drivers switch, the memory setting adjusts the driver’s seat, steering wheel position and outside mirror angle and the front passenger seat also adjusts to the new passenger’s preset preferences.

The IS Series’ optional easy entry system raises the steering wheel when the door is unlocked or the ignition is switched off, making it easier for the driver to get in and out. The Mazda 6 doesn’t offer an easy entry system.

If the windows are left open on the IS Series the driver can close them all at the outside door handle. On a hot day the driver can lower the windows at the outside door handle or from a distance using the keyless remote. (This window function must be activated by your Lexus service department.) The driver of the Mazda 6 can only operate the windows from inside the vehicle, with the ignition on.

The IS Series’ power window, power lock and power mirror switches are lit from behind, making them plainly visible and easier to operate at night. The Mazda 6’s power lock and power mirror switches are unlit, making them difficult to find at night and operate safely.

A power rear sunshade is optional in the IS Series to help block heat and glare for the rear passengers. The Mazda 6 doesn’t offer a rear sunshade.

The IS Series’ standard outside mirrors include heating elements to clear off the mirrors for better visibility. Mazda only offers heated mirrors on the Mazda 6 Grand Touring/Signature.

When the IS Series with available tilt-down mirrors is put in reverse, both rearview mirrors tilt from their original position. This gives the driver a better view of the curb during parallel parking maneuvers. Shifting out of reverse puts the mirrors into their original positions. The Mazda 6’s mirrors don’t automatically adjust for backing.

Both the IS Series and the Mazda 6 offer rear vents. For greater rear passenger comfort, the IS Series has standard rear air conditioning vents to keep rear occupants cool in summer or warm in winter. The Mazda 6 doesn’t offer rear air conditioning vents, only heat vents.

Economic Advantages

© 1999 - 2020 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2020/05/30

According to The Car Book by Jack Gillis, the IS Series is less expensive to operate than the Mazda 6 because it costs $43 less to do the manufacturer’s suggested maintenance for 50,000 miles. Typical repairs cost less on the IS Series than the Mazda 6, including $29 less for front brake pads and $80 less for a fuel pump.

© 1991-2018 Advanta-STAR Automotive Research. All rights reserved.

How much is your car worth?

Get the best value for your car from an Asbury dealership.

Featured Videos