2019 Genesis G90 vs. 2019 BMW 6 Series Gran Coupe

Detailed Review, Specifications & Comparison

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For enhanced safety, the front and rear seat shoulder belts of the Genesis G90 have pretensioners to tighten the seatbelts and eliminate dangerous slack in the event of a collision and force limiters to limit the pressure the belts will exert on the passengers. The BMW 6 Series Gran Coupe doesn’t offer pretensioners for the rear seat belts.

For enhanced safety, the front seat shoulder belts of the Genesis G90 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 BMW 6 Series Gran Coupe doesn’t offer height-adjustable seat belts.

The G90 has standard front and rear seat side-impact airbags and head airbags, which act as a forgiving barrier between the passengers and the door. Combined with high-strength steel door beams this system increases protection from broadside collisions. The 6 Series Gran Coupe doesn't offer rear-seat side-impact airbags, only ones for front seat occupants.

To help make backing safer, the G90’s cross-path warning system uses wide-angle radar in the rear bumper to alert the driver to vehicles approaching from the side, helping the driver avoid collisions. The 6 Series Gran Coupe doesn’t offer a cross-path warning system.

Both the G90 and the 6 Series Gran Coupe have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights, rearview cameras, driver alert monitors and available all wheel drive.

For its top level performance in IIHS driver-side small overlap frontal, moderate overlap frontal, side impact, rear impact and roof-crush tests, its standard front crash prevention system, its “Good” rating in the new passenger-side small overlap crash test, and its headlight’s “Good” rating, the Insurance Institute for Highway Safety grants the G90 its highest rating: “Top Pick Plus” for 2018, a rating granted to only 28 vehicles tested by the IIHS. The 6 Series Gran Coupe has not been tested, yet.


The G90 comes with a full 5-year/60,000-mile basic warranty, which covers the entire car and includes free 24-hour roadside assistance. The 6 Series Gran Coupe’s 4-year/50,000-mile basic warranty expires 1 year and 10,000 miles sooner.

Genesis’ powertrain warranty covers the G90 6 years and 50,000 miles longer than BMW covers the 6 Series Gran Coupe. Any repair needed on the engine, transmission, axles, joints or driveshafts is fully covered for 10 years or 100,000 miles. Coverage on the 6 Series Gran Coupe ends after only 4 years or 50,000 miles.


To reliably start during all conditions and help handle large electrical loads, the G90 has a standard 950-amp battery. The 6 Series Gran Coupe’s 900-amp battery isn’t as powerful.

J.D. Power and Associates rated the G90 first among large premium cars in their 2018 Initial Quality Study. The 6 Series Gran Coupe isn’t in the top three in its category.

J.D. Power and Associates’ 2018 Initial Quality Study of new car owners surveyed provide the statistics that show that Genesis vehicles are better in initial quality than BMW vehicles. J.D. Power ranks Genesis first in initial quality, above the industry average. With 19 more problems per 100 vehicles, BMW is ranked 11th.


As tested in Car and Driver the G90 3.3T is faster than the 640i Gran Coupe (automatics tested):



6 Series

Zero to 60 MPH

5.3 sec

5.6 sec

Zero to 100 MPH

14 sec

15.1 sec

Quarter Mile

14 sec

14.3 sec

Speed in 1/4 Mile

100 MPH

97 MPH

Fuel Economy and Range

To lower fuel costs and make buying fuel easier, the Genesis G90 uses regular unleaded gasoline (premium recommended for maximum performance). The 6 Series Gran Coupe requires premium, which can cost 20 to 55 cents more per gallon.

The G90 has 3.4 gallons more fuel capacity than the 6 Series Gran Coupe’s standard fuel tank (21.9 vs. 18.5 gallons), for longer range between fill-ups.

Environmental Friendliness

In its Green Vehicle Guide, the U.S. Environmental Protection Agency (EPA) rates the Genesis G90 higher (3 to 5 out of 10) than the BMW 6 Series Gran Coupe (1 to 3). This means the G90 produces up to 39 pounds less smog-producing pollutants than the 6 Series Gran Coupe every 15,000 miles.

Brakes and Stopping

For better stopping power the G90’s standard front brake rotors are larger than those on the 6 Series Gran Coupe:



6 Series

Front Rotors

14.2 inches

13.7 inches

Tires and Wheels

For better traction and acceleration, the G90 has larger rear tires than the 6 Series Gran Coupe (275/40R19 vs. 245/45R18).

The G90’s 275/40R19 rear tires provide better handling because they have a lower 40 series profile (height to width ratio) that provides a stiffer sidewall than the 640i Gran Coupe’s standard 45 series tires.

For better ride, handling and brake cooling the G90 has standard 19-inch wheels. Smaller 18-inch wheels are standard on the 640i Gran Coupe.

The G90 has a standard space-saver spare tire so you can replace a flat tire and drive to have the flat repaired or replaced. A spare tire isn’t available on the 6 Series Gran Coupe; it requires you to depend on its run-flat tires, which limits mileage and speed before they are repaired. If a run-flat is damaged beyond repair by a road hazard your vehicle will have to be towed. Some models of the 6 Series Gran Coupe don’t even offer run-flats.

Suspension and Handling

For a smoother ride and more stable handling, the G90’s wheelbase is 7.7 inches longer than on the 6 Series Gran Coupe (124.4 inches vs. 116.7 inches).

For better handling and stability, the track (width between the wheels) on the G90 is 1.1 inches wider in the front than the average track on the 6 Series Gran Coupe.


The design of the Genesis G90 amounts to more than styling. The G90 has an aerodynamic coefficient of drag of .27 Cd. That is lower than the 6 Series Gran Coupe (.29 to .33) and many sports cars. A more efficient exterior helps keep the interior quieter and helps the G90 get better fuel mileage.

Passenger Space

Because it has more passenger and cargo room, the EPA rates the G90 a Large car, while the 6 Series Gran Coupe is rated a Compact.

The G90 has 16.2 cubic feet more passenger volume than the 6 Series Gran Coupe (113.2 vs. 97).

The G90 has .5 inches more front headroom, 4.2 inches more front legroom, 2.4 inches more front shoulder room, 1 inch more rear headroom, 2.5 inches more rear legroom and 3.3 inches more rear shoulder room than the 6 Series Gran Coupe.

For enhanced passenger comfort on long trips the G90 5.0’s rear seats recline. The 6 Series Gran Coupe’s rear seats don’t recline.

Cargo Capacity

The G90 has a much larger trunk than the 6 Series Gran Coupe with its rear seat up (15.7 vs. 12 cubic feet).

To make loading and unloading groceries and cargo easier when your hands are full, just waiting momentarily behind the back bumper can open the G90’s power trunk, leaving your hands completely free. The G90’s power trunk can also be opened or closed by pressing a button. The 6 Series Gran Coupe doesn’t offer a power or hands-free opening trunk.


The G90 has a standard remote vehicle starting system, so the vehicle can be started from inside the driver's house. This allows the driver to comfortably warm up the engine before going out to the vehicle. The climate system will also automatically heat or cool the interior. The 6 Series Gran Coupe doesn’t offer a remote starting system.

To shield the driver and front passenger’s vision over a larger portion of the windshield and side windows, the G90 has standard extendable sun visors. The 6 Series Gran Coupe doesn’t offer extendable visors.

The G90 has standard front air-conditioned seats and the G90 5.0 also has them in the rear. This keeps the passengers comfortable and takes the sting out of hot seats in summer. The 6 Series Gran Coupe doesn’t offer air-conditioned seats in the rear.

The G90 has a standard heated steering wheel to take the chill out of steering on extremely cold winter days before the car heater warms up. A heated steering wheel costs extra on the 6 Series Gran Coupe.


Consumer Reports® recommends the Genesis G90, based on reliability, safety and performance.

The Genesis G90 outsold the BMW 6 Series by 31% during 2017.

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

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