2020 Kia K900 vs. 2019 BMW 6 Series Gran Coupe

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 2020/01/28

For enhanced safety, the front seat shoulder belts of the Kia K900 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 K900 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.

Over 200 people are killed each year when backed over by motor vehicles. The K900 has standard Rear Cross-Traffic Collision Avoidance Assist that uses rear sensors to monitor and automatically apply the brakes to prevent a rear collision. The 6 Series Gran Coupe doesn’t offer backup collision prevention brakes.

To provide maximum traction and stability on all roads, All-Wheel Drive is standard on the K900. But it costs extra on the 6 Series Gran Coupe.

To help make backing safer, the K900’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 K900 and the 6 Series Gran Coupe 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 and driver alert monitors.

Warranty

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The K900 comes with a full 5-year/60,000-mile basic warranty, which covers the entire car and includes 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.

Kia’s powertrain warranty covers the K900 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.

There are over 2 times as many Kia dealers as there are BMW dealers, which makes it much easier should you ever need service under the K900’s warranty.

Reliability

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J.D. Power and Associates’ 2019 Initial Quality Study of new car owners surveyed provide the statistics that show that Kia vehicles are better in initial quality than BMW vehicles. J.D. Power ranks Kia second in initial quality, above the industry average. With 32 more problems per 100 vehicles, BMW is ranked 20th, below the industry average.

From surveys of all its subscribers, Consumer Reports’ December 2019 Auto Issue reports that Kia vehicles are more reliable than BMW vehicles. Consumer Reports ranks Kia 8 places higher in reliability than BMW.

Engine

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The K900’s 3.3 turbo V6 produces 50 more horsepower (365 vs. 315) and 44 lbs.-ft. more torque (376 vs. 332) than the 640i Gran Coupe’s standard 3.0 turbo 6-cylinder.

Fuel Economy and Range

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To lower fuel costs and make buying fuel easier, the Kia K900 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 K900 has 1.8 gallons more fuel capacity than the 6 Series Gran Coupe’s standard fuel tank (20.3 vs. 18.5 gallons), for longer range between fill-ups.

Brakes and Stopping

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For better stopping power the K900’s standard front brake rotors are larger than those on the 6 Series Gran Coupe:

K900

6 Series Gran Coupe

Front Rotors

14.2 inches

13.7 inches

Tires and Wheels

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For better traction and acceleration, the K900 has larger rear tires than the 6 Series Gran Coupe (275/40R19 vs. 245/45R18).

The K900’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 K900 has standard 19-inch wheels. Smaller 18-inch wheels are standard on the 640i Gran Coupe.

The K900 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 tire options on the 6 Series Gran Coupe don’t have a run-flat feature, either.

Suspension and Handling

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For a smoother ride and more stable handling, the K900’s wheelbase is 5.5 inches longer than on the 6 Series Gran Coupe (122.2 inches vs. 116.7 inches).

For better handling and stability, the track (width between the wheels) on the K900 is 1 inch wider in the front than the average track on the 6 Series Gran Coupe.

Chassis

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The design of the Kia K900 amounts to more than styling. The K900 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 K900 get better fuel mileage.

The front grille of the K900 uses electronically controlled shutters to close off airflow and reduce drag when less engine cooling is needed. This helps improve highway fuel economy. The 6 Series Gran Coupe doesn’t offer active grille shutters.

Passenger Space

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Because it has more passenger and cargo room, the EPA rates the K900 a Large car, while the 6 Series Gran Coupe is rated a Compact.

The K900 has 13 cubic feet more passenger volume than the 6 Series Gran Coupe (110 vs. 97).

The K900 has .5 inches more front headroom, 3.6 inches more front legroom, 2.3 inches more front shoulder room, 1 inch more rear headroom, 1.3 inches more rear legroom and 2.6 inches more rear shoulder room than the 6 Series Gran Coupe.

For enhanced passenger comfort on long trips the K900’s available rear seats recline. The 6 Series Gran Coupe’s rear seats don’t recline.

Cargo Capacity

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The K900 has a much larger trunk than the 6 Series Gran Coupe with its rear seat up (15 vs. 12 cubic feet).

To make loading and unloading groceries and cargo easier when your hands are full, the K900’s power trunk can be opened just by waiting momentarily behind the back bumper, leaving your hands completely free. The K900’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.

Ergonomics

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The K900 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 K900 has standard extendable sun visors. The 6 Series Gran Coupe doesn’t offer extendable visors.

The K900 has standard front air conditioned seats and offers them optionally 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 K900 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.

To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the Kia K900 has a standard wireless phone charging system (Qi) in the center console and for the rear passengers. The 6 Series Gran Coupe doesn’t offer wireless personal charging.

Economic Advantages

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Insurance will cost less for the K900 owner. The Complete Car Cost Guide estimates that insurance for the K900 will cost $1965 to $5595 less than the 6 Series Gran Coupe over a five-year period.

IntelliChoice estimates that five-year ownership costs (depreciation, financing, insurance, fuel, fees, repairs and maintenance) for the Kia K900 will be $10223 to $48959 less than for the BMW 6 Series Gran Coupe.

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