2019 Alfa Romeo Giulia vs. 2019 Mazda 6

Detailed Review, Specifications & Comparison

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The Giulia 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 Giulia and the Mazda 6 have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, front seatbelt pretensioners, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights, rearview cameras, available crash mitigating brakes, lane departure warning systems, blind spot warning systems, front parking sensors and rear cross-path warning.

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 “Good” rating, the Insurance Institute for Highway Safety grants the Giulia the rating of “Top Pick” for 2018, a rating granted to only 104 vehicles tested by the IIHS. The Mazda 6 was last qualified as only a “Top Pick” in 2016.


The Giulia 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.


The engine in the Giulia has a single overhead cam for simplicity. The engines in the Mazda 6 have dual overhead cams, which add to the number of moving parts and the complexity of the cylinder heads.

The battery on the Giulia is in the trunk, which protects it from hot underhood temperatures that can degrade battery life. By keeping the Giulia’s battery 20 to 30 degrees cooler, its life is increased by years. The Mazda 6’s battery is in the hot engine compartment.


The Giulia’s 2.0 turbo 4 cyl. produces 93 more horsepower (280 vs. 187) and 120 lbs.-ft. more torque (306 vs. 186) than the Mazda 6’s standard 2.5 DOHC 4 cyl. The Giulia’s 2.0 turbo 4 cyl. produces 30 more horsepower (280 vs. 250) than the Mazda 6 Grand Touring/Signature’s standard 2.5 turbo 4 cyl.

As tested in Car and Driver the Alfa Romeo Giulia is faster than the Mazda 6:


6 4 cyl.

Mazda 6 Grand Touring/Signature

Zero to 60 MPH

5.5 sec

7.3 sec

6.4 sec

Zero to 100 MPH

14.1 sec

20.9 sec

16 sec

5 to 60 MPH Rolling Start

6.7 sec

7.5 sec

6.7 sec

Passing 50 to 70 MPH

4.3 sec

4.8 sec


Quarter Mile

14.1 sec

15.8 sec

14.9 sec

Speed in 1/4 Mile

100 MPH

89 MPH

97 MPH

Top Speed

149 MPH

135 MPH

149 MPH

Fuel Economy and Range

On the EPA test cycle the Giulia gets better fuel mileage than the Mazda 6:




2.0 Turbo 4 cyl.

24 city/33 hwy

Mazda 6


2.5 Turbo 4 cyl.

23 city/31 hwy

In heavy traffic or at stoplights the Giulia’s engine automatically turns off when the vehicle is stopped, saving fuel and reducing pollution. The engine is automatically restarted when the driver gets ready to move again. (Start/Stop isn’t accounted in present EPA fuel mileage tests.) The Mazda 6 doesn’t offer an automatic engine start/stop system.


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

Brakes and Stopping

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


Mazda 6

Mazda 6 Grand Touring/Signature

Front Rotors

13 inches

11.7 inches

12.6 inches

Rear Rotors

12.5 inches

10.9 inches

10.9 inches

The Giulia stops much shorter than the Mazda 6:


Mazda 6

70 to 0 MPH

163 feet

184 feet

Car and Driver

60 to 0 MPH

110 feet

124 feet

Motor Trend

Tires and Wheels

The Giulia’s standard tires provide better handling because they have a lower 50 series profile (height to width ratio) that provides a stiffer sidewall than the Mazda 6 Sport’s standard 55 series tires. The Giulia Ti’s optional 225/40R19 front and 255/35R19 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.

Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires standard on the Giulia can be driven up to 50 miles without any air pressure, allowing you to drive to a service station for a repair. The Mazda 6 doesn’t offer run-flat tires.

Suspension and Handling

The Giulia 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.

For better handling and stability, the track (width between the wheels) on the Giulia is 1.7 inches wider in the rear than the average track on the Mazda 6.

The Giulia Ti handles at .91 G’s, while the Mazda 6 Grand Touring pulls only .82 G’s of cornering force in a Motor Trend skidpad test.

The Giulia Ti Q4 executes Motor Trend’s “Figure Eight” maneuver 2 seconds quicker than the Mazda 6 Touring (25.6 seconds @ .71 average G’s vs. 27.6 seconds @ .62 average G’s).


The Giulia is 10.1 inches shorter than the Mazda 6, making the Giulia easier to handle, maneuver and park in tight spaces.

As tested by Car and Driver, the interior of the Giulia Ti is quieter than the Mazda 6 Grand Touring:



At idle

41 dB

42 dB


74 dB

80 dB

70 MPH Cruising

69 dB

69 dB

Passenger Space

The Giulia has .2 inches more front headroom, .2 inches more front legroom, .2 inches more front shoulder room and .5 inches more rear headroom than the Mazda 6.

Cargo Capacity

A low lift-over trunk design makes loading and unloading the Giulia easier. The Giulia’s trunk lift-over height is 25.8 inches, while the Mazda 6’s liftover is 28.5 inches.

A standard locking glovebox keeps your small valuables safer in the Giulia. The Mazda 6 doesn’t offer locking storage for small valuables.

Servicing Ease

The Giulia 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 Giulia 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 Giulia 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.


The Giulia’s standard easy entry system glides the driver’s seat back, making it easier for the driver to get in and out. The Mazda 6 doesn’t offer an easy entry system.

The power windows standard on both the Giulia and the Mazda 6 have locks to prevent small children from operating them. When the lock on the Giulia is engaged the driver can still operate all of the windows, for instance to close one opened by a child. The Mazda 6 prevents the driver from operating the other windows just as it does the other passengers.

Heated windshield washer nozzles are optional on the Giulia to prevent washer fluid and nozzles from freezing and help continue to keep the windshield clear in sub-freezing temperatures. The Mazda 6 doesn’t offer heated windshield washer nozzles.

The Giulia’s 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.

Both the Giulia and the Mazda 6 offer rear vents. For greater rear passenger comfort, the Giulia 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.


The Giulia was chosen as one of Car and Driver’s “Top Ten” in 2018. The Mazda 6 hasn’t been picked since 2015.

Motor Trend selected the Giulia as their 2018 Car of the Year. The Mazda 6 has never been chosen.

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

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