2019 BMW 6 Series Gran Coupe vs. 2018 Cadillac CTS

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 2020/07/13

The 6 Series Gran Coupe has standard Active Headrests, which use a specially designed headrest to protect the driver and front passenger from whiplash. During a rear-end collision, the Active Headrests system moves the headrests forward to prevent neck and spine injuries. The CTS doesn’t offer a whiplash protection system.

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 CTS 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 CTS doesn’t offer a night vision system.

The 6 Series Gran Coupe’s driver alert monitor detects an inattentive driver then sounds a warning and suggests a break. According to the NHTSA, drivers who fall asleep cause about 100,000 crashes and 1500 deaths a year. The CTS doesn’t offer a driver alert monitor.

Both the 6 Series Gran Coupe and the CTS have standard driver and passenger frontal airbags, front side-impact airbags, driver and front passenger knee airbags, side-impact head airbags, front seatbelt pretensioners, plastic fuel tanks, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights, rear parking sensors, available all wheel drive, crash mitigating brakes, lane departure warning systems, blind spot warning systems and around view monitors.

Warranty

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

Reliability

© 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 2020/07/13

To reliably start during all conditions and help handle large electrical loads, the 6 Series Gran Coupe has a standard 900-amp battery. The CTS’ 730-amp battery isn’t as powerful.

J.D. Power and Associates’ 2017 Initial Quality Study of new car owners surveyed provide the statistics that show that BMW vehicles are better in initial quality than Cadillac vehicles. J.D. Power ranks BMW 6th in initial quality, above the industry average. With 17 more problems per 100 vehicles, Cadillac is ranked 20th, below the industry average.

J.D. Power and Associates’ 2018 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that BMW vehicles are more reliable than Cadillac vehicles. J.D. Power ranks BMW 8th in reliability, above the industry average. With 59 more problems per 100 vehicles, Cadillac is ranked 27th.

From surveys of all its subscribers, Consumer Reports’ April 2018 Auto Issue reports that BMW vehicles are more reliable than Cadillac vehicles. Consumer Reports ranks BMW 22 places higher in reliability than Cadillac.

Engine

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

 

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.

CTS 2.0 turbo 4 cyl.

268 HP

295 lbs.-ft.

CTS 3.6 DOHC V6

335 HP

285 lbs.-ft.

CTS V-Sport 3.6 turbo V6

420 HP

430 lbs.-ft.

As tested in Motor Trend the 650i Gran Coupe is faster than the CTS V-Sport (automatics tested):

 

6 Series

CTS

Zero to 30 MPH

1.4 sec

1.7 sec

Zero to 60 MPH

4.2 sec

4.7 sec

Zero to 80 MPH

6.9 sec

7.4 sec

Zero to 100 MPH

10.7 sec

11.1 sec

Passing 45 to 65 MPH

2.1 sec

2.2 sec

Quarter Mile

12.7 sec

13.1 sec

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 2020/07/13

On the EPA test cycle the 640i Gran Coupe RWD gets better fuel mileage than the CTS V-Sport (20 city/29 hwy vs. 16 city/24 hwy).

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

Regardless of its engine, the 6 Series Gran Coupe’s engine automatically turns off when the vehicle is stopped, saving fuel and reducing pollution. (Start/Stop isn’t accounted in present EPA fuel mileage tests.) The CTS V-Sport doesn’t offer an automatic engine start/stop system.

The 6 Series Gran Coupe M6’s standard fuel tank has 2.1 gallons more fuel capacity than the CTS (21.1 vs. 19 gallons).

Transmission

© 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 2020/07/13

The 6 Series Gran Coupe offers a manual transmission for better acceleration, control and fuel economy. The CTS doesn’t offer a manual 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 CTS doesn’t offer an SMG.

Brakes and Stopping

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

 

640i/650i

M6 w/Carbon Brakes

CTS

CTS V-Sport

Front Rotors

13.7 inches

16.1 inches

12.6 inches

13.6 inches

Rear Rotors

13.6 inches

15.6 inches

12.4 inches

12.4 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 CTS doesn’t offer ceramic brake rotors.

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

 

6 Series

CTS

 

60 to 0 MPH

102 feet

115 feet

Motor Trend

Tires and Wheels

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For better traction, the M6 Gran Coupe’s tires are larger than the largest tires available on the CTS (F:265/35R20 & R:295/30R20 vs. 255/35R19).

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

For better ride, handling and brake cooling the 640i Gran Coupe has standard 18-inch wheels. Smaller 17-inch wheels are standard on the CTS. The 6 Series Gran Coupe’s optional 20-inch wheels are larger than the 19-inch wheels optional on the CTS.

Suspension and Handling

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

For a smoother ride and more stable handling, the 6 Series Gran Coupe’s wheelbase is 2.1 inches longer than on the CTS (116.7 inches vs. 114.6 inches).

For better handling and stability, the average track (width between the wheels) on the 6 Series Gran Coupe is 1.9 inches wider in the front and 2.8 inches wider in the rear than the average track on the CTS.

The M6 Gran Coupe handles at .97 G’s, while the CTS Luxury AWD pulls only .81 G’s of cornering force in a Motor Trend skidpad test.

The M6 Gran Coupe executes Motor Trend’s “Figure Eight” maneuver 2.5 seconds quicker than the CTS Luxury AWD (24.3 seconds @ .82 average G’s vs. 26.8 seconds @ .65 average G’s).

Chassis

© 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 2020/07/13

As tested by Car and Driver, the interior of the 640i Gran Coupe is quieter than the CTS V-Sport Premium Luxury:

 

6 Series Gran Coupe

CTS

At idle

36 dB

43 dB

Full-Throttle

75 dB

84 dB

Passenger Space

© 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 2020/07/13

The 6 Series Gran Coupe has .2 inches more front headroom, 5.9 inches more front hip room and 3.9 inches more rear hip room than the CTS.

Ergonomics

© 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 2020/07/13

Unlike the driver-only memory system in the CTS, 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 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 CTS’ standard manually variable intermittent wipers have to be constantly adjusted.

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 CTS doesn’t offer headlight washers.

Model Availability

© 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 2020/07/13

The BMW 6 Series comes in convertible, sedan and four-door hatchback bodystyles; the Cadillac CTS isn’t available as a convertible or four-door hatchback.

Economic Advantages

© 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 2020/07/13

The 6 Series Gran Coupe will cost the buyer less in the long run because of its superior resale value. The IntelliChoice estimates that the 6 Series Gran Coupe will retain 39.17% to 44.13% of its original price after five years, while the CTS only retains 37.28% to 38.81%.

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

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