2020 Porsche Panamera vs. 2020 Lexus GS Series

Detailed Review, Specifications & Comparison

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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 2020/08/13

Both the Panamera and GS Series 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 GS 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.

The Panamera offers an optional Surround View System to allow the driver to see objects all around the vehicle on a screen. The GS Series 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.

Both the Panamera and the GS Series have standard driver and passenger frontal airbags, front and rear side-impact airbags, driver and front passenger knee 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, daytime running lights, rearview cameras, available crash mitigating brakes, night vision systems, lane departure warning systems and blind spot warning systems.

Warranty

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The Panamera’s corrosion warranty is 6 years longer than the GS Series’ (12 vs. 6 years).

Reliability

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

Engine

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The Panamera’s standard 3.0 turbo V6 produces 19 more horsepower (330 vs. 311) and 50 lbs.-ft. more torque (330 vs. 280) than the GS Series’ 3.5 DOHC V6. The Panamera 4S’ standard 2.9 turbo V6 produces 129 more horsepower (440 vs. 311) and 125 lbs.-ft. more torque (405 vs. 280) than the GS Series’ 3.5 DOHC V6. The Panamera GTS’ standard 4.0 turbo V8 produces 142 more horsepower (453 vs. 311) and 177 lbs.-ft. more torque (457 vs. 280) than the GS Series’ 3.5 DOHC V6. The Panamera 4 E-Hybrid’s standard 2.9 turbo V6 hybrid produces 146 more horsepower (457 vs. 311) and 236 lbs.-ft. more torque (516 vs. 280) than the GS Series’ 3.5 DOHC V6. The Panamera Turbo S E-Hybrid’s standard 4.0 turbo V8 hybrid produces 366 more horsepower (677 vs. 311) and 346 lbs.-ft. more torque (626 vs. 280) than the GS Series’ 3.5 DOHC V6.

As tested in Car and Driver the Porsche Panamera (base engine) is faster than the Lexus GS Series:

Panamera

GS Series

Zero to 30 MPH

1.8 sec

2.1 sec

Zero to 60 MPH

4.7 sec

5.5 sec

Zero to 100 MPH

11.6 sec

13.6 sec

5 to 60 MPH Rolling Start

5.5 sec

5.7 sec

Passing 30 to 50 MPH

3 sec

3.1 sec

Quarter Mile

13.3 sec

14.1 sec

Speed in 1/4 Mile

107 MPH

102 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 2020/08/13

On the EPA test cycle the Panamera E-Hybrid running on electricity gets better fuel mileage than the GS Series:

MPGe

Panamera E-Hybrid

AWD

2.9 turbo V6 Hybrid

48 city/54 hwy

4.0 turbo V8 Hybrid

46 city/51 hwy

MPG

GS Series

FWD

3.5 DOHC V6

20 city/28 hwy

F Sport 3.5 DOHC V6

19 city/27 hwy

AWD

3.5 DOHC V6

19 city/26 hwy

The Panamera 4 E-Hybrid can drive on battery power alone for up to 14 miles. The GS Series must run its internal combustion engine to move.

An engine control system that can shut down half of the engine’s cylinders helps improve the Panamera Turbo/GTS’ fuel efficiency. The GS Series doesn’t offer a system that can shut down part of the engine.

Regenerative brakes improve the Panamera’s fuel efficiency by converting inertia back into energy instead of wasting it (mild regeneration on non-hybrids). The GS Series doesn’t offer a regenerative braking system.

In heavy traffic or at stoplights the Panamera’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 GS Series doesn’t offer an automatic engine start/stop system.

The Panamera E Hybrid’s standard fuel tank has 3.7 gallons more fuel capacity than the GS Series (21.1 vs. 17.4 gallons), for longer range between fill-ups. The Panamera’s standard fuel tank has 6.3 gallons more fuel capacity than the GS Series (23.7 vs. 17.4 gallons).

Transmission

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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 GS Series doesn’t offer an SMG or a conventional manual transmission.

The Panamera’s optional launch control uses engine electronics to hold engine RPM’s precisely in order to provide the most stable and rapid acceleration possible, using all of the available traction. The GS Series doesn’t offer launch control.

Brakes and Stopping

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

Panamera Base

Panamera

GS Series

GS Series F Sport

Front Rotors

13.8 inches

16.5 inches

13.1 inches

14 inches

Rear Rotors

13 inches

16.1 inches

12.2 inches

12.2 inches

The Panamera offers optional heat-treated ceramic brake rotors, which last ten to twenty times as long as conventional cast iron rotors, don’t rust, don’t fade during repeated high speed braking, and their lighter weight contribute to better braking, handling and acceleration. The GS Series doesn’t offer ceramic brake rotors.

The Panamera stops much shorter than the GS Series:

Panamera

GS Series

70 to 0 MPH

153 feet

174 feet

Car and Driver

60 to 0 MPH

101 feet

110 feet

Motor Trend

Tires and Wheels

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For better traction, the Panamera has larger standard tires than the GS Series (F:265/45R19 & R:295/40R19 vs. 235/45R18). The Panamera’s optional tires are larger than the largest tires available on the GS Series (F:275/40R20 & R:315/35R20 vs. F:235/40R19 & R:265/35R19).

The Panamera’s standard 295/40R19 rear tires provide better handling because they have a lower 40 series profile (height to width ratio) that provides a stiffer sidewall than the GS Series’ standard 45 series tires. The Panamera’s optional 275/35R21 front and 315/30R21 rear tires have a lower 35 series front and 30 series rear profile than the GS Series F Sport’s 40 series front and 35 series rear tires.

For better ride, handling and brake cooling the Panamera has standard 19-inch wheels. Smaller 18-inch wheels are standard on the GS Series. The Panamera’s optional 21-inch wheels are larger than the 19-inch wheels optional on the GS Series.

Suspension and Handling

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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 GS Series 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. Lexus doesn’t offer an active suspension on the GS Series.

The Panamera has a standard automatic load leveling suspension to keep ride height level with a heavy load or when towing. The GS Series doesn’t offer a load leveling suspension.

For a smoother ride and more stable handling, the Panamera’s wheelbase is 3.9 inches longer than on the GS Series (116.1 inches vs. 112.2 inches). The Panamera Executive’s wheelbase is 9.8 inches longer than on the GS Series (122 inches vs. 112.2 inches).

For better handling and stability, the average track (width between the wheels) on the Panamera is 3.5 inches wider in the front and 2.1 inches wider in the rear than the track on the GS Series.

The Panamera Turbo handles at 1.00 G’s, while the GS 350 pulls only .88 G’s of cornering force in a Car and Driver skidpad test.

The Panamera Turbo executes Motor Trend’s “Figure Eight” maneuver 2.2 seconds quicker than the GS 350 (23.9 seconds @ .86 average G’s vs. 26.1 seconds @ .72 average G’s).

Chassis

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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 GS Series 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 GS Series doesn’t offer active noise cancellation.

As tested by Car and Driver while under full throttle, the interior of the Panamera Turbo is quieter than the GS 350 (75 vs. 79 dB).

Passenger Space

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

The Panamera has 9 cubic feet more passenger volume than the GS Series (108 vs. 99).

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

Cargo Capacity

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The Panamera’s available rear seats fold to accommodate long and bulky cargo. The GS Series doesn’t offer folding rear seats, only a ski pass-through.

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

To make loading groceries and cargo easier when your hands are full, the Panamera’s available liftgate can be opened and closed just by kicking your foot under the back bumper, leaving your hands completely free. The GS Series doesn’t offer a hands-free gesture to open its trunk, forcing you to put cargo down if your hands are full.

Servicing Ease

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J.D. Power and Associates surveys of service recipients show that Porsche service is better than Lexus. J.D. Power ranks Porsche first in service department satisfaction. With a 12% lower rating, Lexus is ranked second.

Ergonomics

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The Panamera’s rain-sensitive wipers adjust their speed and turn on and off automatically based on the amount of rainfall on the windshield. This allows the driver to concentrate on driving without constantly adjusting the wipers. The GS Series’ standard manually variable intermittent wipers have to be constantly adjusted.

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

A power rear sunshade is optional in the Panamera (except Sport Turismo) and power rear side window sunshades are optional in the Panamera to help block heat and glare for the rear passengers. The GS Series doesn’t offer rear side window sunshades.

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

The Panamera offers optional massaging front and rear seats in order to maximize comfort and eliminate fatigue on long trips. Massaging seats aren’t available in the GS Series.

The Panamera Sport Turismo offers an optional 115-volt a/c outlet in the cargo area, allowing you to recharge a laptop or run small household appliances without special adapters that can break or get misplaced. The GS Series doesn’t offer a house-current electrical outlet.

Model Availability

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The Porsche Panamera comes in four door hatchback and station wagon bodystyles; the Lexus GS Series isn’t available as a station wagon.

Recommendations

© 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 2020/08/13

The Porsche Panamera outsold the Lexus GS Series by 67% during the 2019 model year.

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