2019 BMW 6 Series Gran Coupe vs. 2019 Genesis G90

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 G90 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 G90 doesn’t offer a night vision system.

Both the 6 Series Gran Coupe and the G90 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, blind spot warning systems and around view monitors.

Warranty

The 6 Series Gran Coupe’s corrosion warranty is 5 years longer than the G90’s (12 vs. 7 years).

Reliability

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 G90:

 

Horsepower

Torque

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.

G90 3.3T 3.3 turbo V6

365 HP

376 lbs.-ft.

G90 5.0 DOHC V8

420 HP

383 lbs.-ft.

As tested in Motor Trend the 650i Gran Coupe 4.4 turbo V8 is faster than the G90 5.0 DOHC V8 (automatics tested):

 

6 Series Gran Coupe

G90

Zero to 30 MPH

1.4 sec

1.9 sec

Zero to 60 MPH

4.2 sec

5 sec

Zero to 80 MPH

6.9 sec

8.1 sec

Zero to 100 MPH

10.7 sec

12.3 sec

Passing 45 to 65 MPH

2.1 sec

2.5 sec

Quarter Mile

12.7 sec

13.5 sec

Speed in 1/4 Mile

108 MPH

104.5 MPH

Fuel Economy and Range

On the EPA test cycle the 6 Series Gran Coupe gets better fuel mileage than the G90:

 

 

6 Series Gran Coupe

G90

 

RWD

3.0 turbo 6 cyl./8-spd. Auto

20 city/29 hwy

17 city/24 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

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 G90 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 G90 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 G90 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 G90:

 

M6 w/Carbon Brakes

G90 3.3T

G90 5.0

Front Rotors

16.1 inches

14.2 inches

14.8 inches

Rear Rotors

15.6 inches

13.4 inches

13.4 inches

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 G90 doesn’t offer ceramic brake rotors.

The 6 Series Gran Coupe stops much shorter than the G90:

 

6 Series Gran Coupe

G90

 

70 to 0 MPH

162 feet

179 feet

Car and Driver

60 to 0 MPH

102 feet

122 feet

Motor Trend

Tires and Wheels

For better traction, the M6 Gran Coupe’s tires are larger than the largest tires available on the G90 (F:265/35R20 & R:295/30R20 vs. F:245/45R19 & R:275/40R19).

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 G90’s 45 series front and 40 series rear tires.

For better ride, handling and brake cooling the 6 Series Gran Coupe offers optional 20-inch wheels. The G90’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 G90 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 G90.

The M6 Gran Coupe handles at .97 G’s, while the G90 3.3T AWD pulls only .83 G’s of cornering force in a Motor Trend skidpad test.

The M6 Gran Coupe executes Motor Trend’s “Figure Eight” maneuver 2.6 seconds quicker than the G90 3.3T AWD (24.3 seconds @ .82 average G’s vs. 26.9 seconds @ .67 average G’s).

Chassis

The BMW 6 Series Gran Coupe may be more efficient, handle and accelerate better because it weighs about 150 to 450 pounds less than the Genesis G90.

The 6 Series Gran Coupe is 7.7 inches shorter than the G90, making the 6 Series Gran Coupe easier to handle, maneuver and park in tight spaces.

Passenger Space

The 6 Series Gran Coupe has 3.2 inches more front hip room and 2.2 inches more rear hip room than the G90.

Cargo Capacity

The 6 Series Gran Coupe’s standard rear seats fold to accommodate long and bulky cargo. The G90 doesn’t offer folding rear seats, only a ski pass-through.

Ergonomics

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 G90 can only operate the windows from inside the vehicle, with the ignition on.

In poor weather, headlights can lose their effectiveness as grime builds up on their lenses. This can reduce visibility without the driver realizing. The 6 Series Gran Coupe has standard headlight washers to keep headlight output high. The G90 doesn’t offer headlight washers.

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 G90 doesn’t offer an automated parking system.

Model Availability

The BMW 6 Series comes in sedan and four-door hatchback bodystyles; the Genesis G90 isn’t available as a four-door hatchback.

Recommendations

The BMW 6 Series outsold the Genesis G90 by 68% during 2018.

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

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