2019 Porsche Panamera vs. 2019 Alfa Romeo Giulia Quadrifoglio

Detailed Review, Specifications & Comparison

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2019 Alfa Romeo Giulia Quadrifoglio

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Safety

For enhanced safety, the front seat shoulder belts of the Porsche Panamera are height-adjustable to accommodate a wide variety of driver and passenger heights. A better fit can prevent injuries and the increased comfort also encourages passengers to buckle up. The Alfa Romeo Giulia Quadrifoglio doesn’t offer height-adjustable seat belts.

Both the Panamera and Giulia Quadrifoglio have child safety locks to prevent children from opening the rear doors. The Panamera offers optional 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 Giulia Quadrifoglio’s 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.

The Panamera offers available whiplash protection, which use a specially designed headrest to protect the driver and front passenger from whiplash. During a rear-end collision, the whiplash protection system moves the headrests forward to prevent neck and spine injuries. The Giulia Quadrifoglio doesn’t offer a whiplash protection system.

The Panamera offers all-wheel drive to maximize traction under poor conditions, especially in ice and snow. The Giulia Quadrifoglio doesn’t offer all-wheel drive.

A passive infrared night vision system optional on the Panamera helps the driver to more easily detect people, animals or other objects in front of the vehicle at night. Using an infrared camera to detect heat, the system then displays the image on a monitor in the dashboard and even aims one of the vehicle’s headlights in the direction of the person or object. The Giulia Quadrifoglio doesn’t offer a night vision system.

The Panamera offers an optional Surround View System to allow the driver to see objects all around the vehicle on a screen. The Giulia Quadrifoglio only offers a rear monitor and front and rear parking sensors that beep or flash a light. That doesn’t help with obstacles to the sides.

The Panamera has standard Porsche Connect, which uses a global positioning satellite (GPS) receiver and a cellular system to remotely unlock your doors if you lock your keys in, help track down your vehicle if it’s stolen or send emergency personnel to the scene if any airbags deploy. The Giulia Quadrifoglio doesn’t offer a GPS response system, only a navigation computer with no live response for emergencies, so if you’re involved in an accident and you’re incapacitated help may not come as quickly.

Both the Panamera and the Giulia Quadrifoglio have standard driver and passenger frontal airbags, front side-impact airbags, driver and front passenger knee 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 and blind spot warning systems.

Warranty

The Panamera’s corrosion warranty is 8 years longer than the Giulia Quadrifoglio’s (12 vs. 4 years).

There are over 9 percent more Porsche dealers than there are Alfa Romeo dealers, which makes it easier should you ever need service under the Panamera’s warranty.

Engine

The Panamera GTS’ standard 4.0 turbo V8 produces 14 lbs.-ft. more torque (457 vs. 443) than the Giulia Quadrifoglio’s 2.9 turbo V6. The Panamera 4 E-Hybrid’s standard 2.9 turbo V6 hybrid produces 73 lbs.-ft. more torque (516 vs. 443) than the Giulia Quadrifoglio’s 2.9 turbo V6. The Panamera Turbo S E-Hybrid ’s standard 4.0 turbo V8 hybrid produces 175 more horsepower (680 vs. 505) and 183 lbs.-ft. more torque (626 vs. 443) than the Giulia Quadrifoglio’s 2.9 turbo V6.

As tested in Motor Trend the Panamera 4S 2.9 turbo V6 is faster than the Alfa Romeo Giulia Quadrifoglio:

 

Panamera

Giulia Quadrifoglio

Zero to 30 MPH

1.3 sec

1.6 sec

Zero to 60 MPH

3.8 sec

3.9 sec

Fuel Economy and Range

On the EPA test cycle the Panamera RWD Auto with its standard engine gets better fuel mileage than the Giulia Quadrifoglio (21 city/28 hwy vs. 17 city/24 hwy).

The Panamera 4 E-Hybrid can drive on battery power alone for up to 31 miles. The Giulia Quadrifoglio must run its internal combustion engine to move.

Regenerative brakes improve the Panamera’s fuel efficiency by converting inertia back into energy instead of wasting it. The Giulia Quadrifoglio doesn’t offer a regenerative braking system.

The Panamera E Hybrid’s standard fuel tank has 5.8 gallons more fuel capacity than the Giulia Quadrifoglio (21.1 vs. 15.3 gallons), for longer range between fill-ups. The Panamera’s standard fuel tank has 8.4 gallons more fuel capacity than the Giulia Quadrifoglio (23.7 vs. 15.3 gallons).

Transmission

The Panamera offers a standard sequential manual gearbox (SMG). With no clutch pedal to worry about and a fully automatic mode, an SMG is much more efficient than a conventional automatic but just as easy to drive. The Giulia Quadrifoglio doesn’t offer an SMG or a conventional manual transmission.

Brakes and Stopping

For better stopping power the Panamera’s front brake rotors are larger than those on the Giulia Quadrifoglio:

 

Panamera

Giulia Quadrifoglio

Giulia Quadrifoglio

Front Rotors

16.5 inches

14.2 inches

15.4 inches

Rear Rotors

16.1 inches

13.8 inches

14.2 inches

Tires and Wheels

For better traction, the Panamera has larger standard tires than the Giulia Quadrifoglio (F:265/45R19 & R:295/40R19 vs. F:245/35R19 & R:285/30R19). The Panamera’s optional tires are larger than the largest tires available on the Giulia Quadrifoglio (F:275/40R20 & R:315/35R20 vs. F:245/35R19 & R:285/30R19).

For better ride, handling and brake cooling the Panamera offers optional 21-inch wheels. The Giulia Quadrifoglio’s largest wheels are only 19-inches.

Suspension and Handling

The Panamera offers active sway bars, which help keep it flat and controlled during cornering, but disconnect at lower speeds to smooth the ride and offer greater off-road suspension articulation. This helps keep the tires glued to the road on-road and off. The Giulia Quadrifoglio doesn’t offer an active sway bar system.

The Panamera offers an available adjustable active suspension system, which counteracts cornering forces actively, limiting body roll and improving handling and stability. Alfa Romeo doesn’t offer an active suspension on the Giulia Quadrifoglio.

The Panamera has a standard automatic front and rear load leveling suspension to keep ride height level with a heavy load or when towing. The Panamera’s height leveling suspension allows the driver to raise ride height for better off-road clearance and then lower it again for easier entering and exiting and better on-road handling. The Giulia Quadrifoglio doesn’t offer a load leveling suspension.

For a smoother ride and more stable handling, the Panamera’s wheelbase is 5.1 inches longer than on the Giulia Quadrifoglio (116.1 inches vs. 111 inches). The Panamera Executive’s wheelbase is 11 inches longer than on the Giulia Quadrifoglio (122 inches vs. 111 inches).

For better handling and stability, the average track (width between the wheels) on the Panamera is 4.3 inches wider in the front and 1.5 inches wider in the rear than the track on the Giulia Quadrifoglio.

The Panamera 4S handles at 1.01 G’s, while the Giulia Quadrifoglio pulls only .97 G’s of cornering force in a Motor Trend skidpad test.

Chassis

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

The Panamera offers available computer-generated active noise cancellation to help remove annoying noise and vibration from the passenger compartment, especially at low frequencies. The Giulia Quadrifoglio doesn’t offer active noise cancellation.

As tested by Car and Driver, the interior of the Panamera Turbo is quieter than the Giulia Quadrifoglio:

 

Panamera

Giulia Quadrifoglio

At idle

44 dB

48 dB

Full-Throttle

75 dB

80 dB

70 MPH Cruising

64 dB

68 dB

Passenger Space

Because it has more passenger and cargo room, the EPA rates the Panamera 4dr Hatchback a Large car, while the Giulia Quadrifoglio is rated a Mid-size.

The Panamera has 12.6 cubic feet more passenger volume than the Giulia Quadrifoglio (108 vs. 95.4).

For enhanced passenger comfort on long trips the Panamera’s available rear seats recline. The Giulia Quadrifoglio’s rear seats don’t recline.

Cargo Capacity

The Panamera has a much larger trunk with its rear seat up than the Giulia Quadrifoglio (17.6 vs. 12 cubic feet).

The Panamera 4dr Hatchback has a much larger trunk with its rear seat up than the Giulia Quadrifoglio (18.3 vs. 12 cubic feet).

Pressing a switch automatically lowers the Panamera’s rear seats, to make changing between passengers and cargo easier. The Giulia Quadrifoglio doesn’t offer automatic folding seats.

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

To make loading and unloading groceries and cargo easier, especially for short adults, the Panamera has a standard power liftgate, which opens and closes automatically by pressing a button, or optionally by just kicking your foot under the back bumper, completely leaving your hands free. The Giulia Quadrifoglio doesn’t offer a power trunk.

Ergonomics

Unlike the driver-only memory seat and mirrors in the Giulia Quadrifoglio, the Panamera offers an optional driver and passenger memory, so that when drivers switch, the memory setting adjusts the driver’s seat, steering wheel position, outside mirror angle, climate settings and radio stations and the front passenger seat also adjusts to the new passenger’s preset preferences.

The Panamera’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 Giulia Quadrifoglio has neither an oil pressure gauge nor a temperature gauge.

To improve rear visibility by keeping the rear window clear, the Panamera offers an optional rear wiper. The Giulia Quadrifoglio doesn’t offer a rear wiper.

A power rear sunshade is optional in the Panamera to help block heat and glare for the rear passengers. The Giulia Quadrifoglio doesn’t offer a rear sunshade.

When the Panamera is put in reverse, the passenger rearview mirror tilts from its original position. This gives the driver a better view of the curb during parallel parking maneuvers. Shifting out of reverse puts the mirror into its original position. The Giulia Quadrifoglio’s mirror doesn’t automatically adjust for backing.

Optional air conditioned front and rear seats keep the Panamera’s passengers comfortable and take the sting out of hot leather in summer. The Giulia Quadrifoglio doesn’t offer air-conditioned seats.

The Panamera offers an optional 115-volt a/c outlet on the center console, allowing you to recharge a laptop or run small household appliances without special adapters that can break or get misplaced. The Giulia Quadrifoglio doesn’t offer a house-current electrical outlet.

Model Availability

The Porsche Panamera comes in four door hatchback and station wagon bodystyles; the Alfa Romeo Giulia Quadrifoglio isn’t available as a station wagon.

Economic Advantages

The Panamera will cost the buyer less in the long run because of its superior resale value. The IntelliChoice estimates that the Panamera will retain 42.42% to 48.11% of its original price after five years, while the Giulia Quadrifoglio only retains 39.17%.

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

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