2019 BMW 6 Series Gran Coupe vs. 2019 Genesis G80

Detailed Review, Specifications & Comparison

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Safety

The 6 Series Gran Coupe has standard Post-Crash Braking, which automatically apply the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The G80 doesn’t offer a post collision braking system: in the event of a collision that triggers the airbags, more collisions are possible without the protection of airbags that may have already deployed.

A passive infrared night vision system optional on the 6 Series Gran Coupe 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. The G80 doesn’t offer a night vision system.

The 6 Series Gran Coupe offers an optional Surround View to allow the driver to see objects all around the vehicle on a screen. The G80 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.

Compared to metal, the 6 Series Gran Coupe’s plastic fuel tank can withstand harder, more intrusive impacts without leaking; this decreases the possibility of fire. The Genesis G80 has a metal gas tank.

Both the 6 Series Gran Coupe and the G80 have standard driver and passenger frontal airbags, front side-impact airbags, driver 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, driver alert monitors, available all wheel drive, crash mitigating brakes, lane departure warning systems and blind spot warning systems.

Warranty

The 6 Series Gran Coupe’s corrosion warranty is 5 years longer than the G80’s (12 vs. 7 years).

Reliability

To reliably start during all conditions and help handle large electrical loads, the 6 Series Gran Coupe has a standard 900-amp battery. The G80’s 740-amp battery isn’t as powerful.

From surveys of all its subscribers, Consumer Reports’ December 2018 Auto Issue reports that BMW vehicles are more reliable than Genesis vehicles. Consumer Reports ranks BMW 4 places higher in reliability than Genesis.

Engine

The 6 Series Gran Coupe has more powerful engines than the G80:

 

Horsepower

Torque

640i Gran Coupe 3.0 turbo 6 cyl.

315 HP

332 lbs.-ft.

650i Gran Coupe 4.4 turbo V8

443 HP

479 lbs.-ft.

M6 Gran Coupe 4.4 turbo V8

552 HP

502 lbs.-ft.

Alpina B6 Gran Coupe 4.4 turbo V8

591 HP

590 lbs.-ft.

M6 Gran Coupe Competition 4.4 turbo V8

592 HP

502 lbs.-ft.

G80 3.8 DOHC V6

311 HP

293 lbs.-ft.

G80 3.3T Sport 3.3 turbo V6

365 HP

376 lbs.-ft.

G80 5.0 DOHC V8

420 HP

383 lbs.-ft.

As tested in Car and Driver the 650i Gran Coupe 4.4 turbo V8 is faster than the Genesis G80 (automatics tested):

 

6 Series Gran Coupe

G80 3.3T Sport

G80 5.0

Zero to 60 MPH

4.6 sec

5 sec

5 sec

Zero to 100 MPH

10.8 sec

12.5 sec

12.3 sec

5 to 60 MPH Rolling Start

5.3 sec

5.7 sec

5.6 sec

Quarter Mile

12.9 sec

13.6 sec

13.6 sec

Speed in 1/4 Mile

109 MPH

104 MPH

105 MPH

Fuel Economy and Range

On the EPA test cycle the 6 Series Gran Coupe gets better fuel mileage than the G80:

 

 

6 Series Gran Coupe

G80

 

RWD

n/a

18 city/26 hwy

3.8 V6/Auto

 

3.0 turbo 6 cyl./8-spd. Auto

20 city/29 hwy

17 city/25 hwy

3.3 turbo V6/Auto

 

n/a

16 city/24 hwy

5.0 V8/Auto

 

4.4 twin turbo V8 (443 HP)/8-spd. Auto

18 city/26 hwy

n/a

 

AWD

n/a

18 city/24 hwy

3.8 V6/Auto

 

3.0 turbo 6 cyl./8-spd. Auto

19 city/28 hwy

17 city/24 hwy

3.3 turbo V6/Auto

 

n/a

15 city/23 hwy

5.0 V8/Auto

 

4.4 twin turbo V8 (591 HP)/8-spd. Auto

17 city/25 hwy

n/a

 

Regenerative brakes improve the 6 Series Gran Coupe’s fuel efficiency by converting inertia back into energy instead of wasting it. The G80 doesn’t offer a regenerative braking system.

In heavy traffic or at stoplights the 6 Series Gran Coupe’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 G80 doesn’t offer an automatic engine start/stop system.

Transmission

The 6 Series Gran Coupe offers an available 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 G80 doesn’t offer an SMG.

Brakes and Stopping

For better stopping power the M6 w/Carbon Brakes’ brake rotors are larger than those on the G80:

 

640i/650i

M6 w/Carbon Brakes

G80 3.8

G80 3.3T Sport

Front Rotors

13.7 inches

16.1 inches

13.6 inches

14.2 inches

Rear Rotors

13.6 inches

15.6 inches

12.4 inches

13 inches

The 6 Series Gran Coupe’s standard front and rear disc brakes are vented to help dissipate heat for shorter stops with less fading. The rear discs standard on the G80 3.8 are solid, not vented.

The 6 Series Gran Coupe M6 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 G80 doesn’t offer ceramic brake rotors.

The 6 Series Gran Coupe stops much shorter than the G80:

 

6 Series Gran Coupe

G80

 

70 to 0 MPH

162 feet

180 feet

Car and Driver

60 to 0 MPH

102 feet

116 feet

Motor Trend

Tires and Wheels

For better traction, the M6 Gran Coupe’s tires are larger than the largest tires available on the G80 (F:265/35R20 & R:295/30R20 vs. F:245/40R19 & R:275/35R19).

The 6 Series Gran Coupe’s optional 245/35R20 front and 275/30R20 rear tires provide better handling because they have a lower 35 series front and 30 series rear profile (height to width ratio) that provides a stiffer sidewall than the G80’s optional 40 series front and 35 series rear tires.

For better ride, handling and brake cooling the 6 Series Gran Coupe offers optional 20-inch wheels. The G80’s largest wheels are only 19-inches.

Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires available on the 6 Series Gran Coupe can be driven up to 50 miles without any air pressure, allowing you to drive to a service station for a repair. The G80 doesn’t offer run-flat tires.

Suspension and Handling

The 6 Series Gran Coupe offers an available active suspension system, which counteracts cornering forces actively, limiting body roll and improving handling and stability. Genesis doesn’t offer an active suspension on the G80.

The M6 Gran Coupe handles at .97 G’s, while the G80 3.8 AWD pulls only .86 G’s of cornering force in a Motor Trend skidpad test.

The M6 Gran Coupe executes Motor Trend’s “Figure Eight” maneuver 2.4 seconds quicker than the G80 5.0 (24.3 seconds @ .82 average G’s vs. 26.7 seconds @ .7 average G’s).

Chassis

As tested by Car and Driver, the interior of the 640i Gran Coupe is quieter than the G80 5.0:

 

6 Series Gran Coupe

G80

At idle

36 dB

39 dB

70 MPH Cruising

69 dB

70 dB

Passenger Space

The 6 Series Gran Coupe has 4 inches more front hip room, .3 inches more rear legroom and 2.4 inches more rear hip room than the G80.

Cargo Capacity

The 6 Series Gran Coupe’s standard rear seats fold to accommodate long and bulky cargo. The G80 doesn’t offer folding rear seats, only a ski pass-through.

Ergonomics

Unlike the driver-only memory system in the G80, the 6 Series Gran Coupe offers an optional 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 6 Series Gran Coupe’s standard easy entry system raises the steering wheel and glides the driver’s seat back, making it easier for the driver to get in and out. An easy entry system costs extra on the G80.

If the windows are left open on the 6 Series Gran Coupe the driver can close them all at the outside door handle. On a hot day the driver can lower the windows from a distance using the keyless remote. The driver of the G80 can only operate the windows from inside the vehicle, with the ignition on.

Optional air conditioned seats in the 6 Series Gran Coupe keep the driver and front passenger comfortable and take the sting out of hot seats in summer. The G80 only offers an air-conditioned driver’s seat.

The 6 Series Gran Coupe (except xDrive)’s optional Parking Assistant can parallel park or back into a parking spot by itself, with the driver only controlling speed with the brake pedal. The G80 doesn’t offer an automated parking system.

Model Availability

The BMW 6 Series comes in sedan and four-door hatchback bodystyles; the Genesis G80 isn’t available as a four-door hatchback.

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

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