2020 BMW 7 Series vs. 2019 Cadillac CT6

Detailed Review, Specifications & Comparison

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Safety

The 7 Series 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 CT6 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.

The 7 Series’ 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 CT6 doesn’t offer a driver alert monitor.

Both the 7 Series and the CT6 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, rearview cameras, available all wheel drive and night vision systems.

Warranty

The 7 Series’ corrosion warranty is 6 years longer than the CT6’s (12 vs. 6 years).

BMW pays for scheduled maintenance on the 7 Series for 3 years and 36,000 miles. BMW will pay for oil changes, lubrication and any other required maintenance. Cadillac only pays for the first scheduled maintenance visit on the CT6.

Reliability

A reliable vehicle saves its owner time, money and trouble. Nobody wants to be stranded or have to be without a vehicle while it’s being repaired. Consumer Reports rates the 7 Series’ reliability 39 points higher than the CT6.

J.D. Power and Associates rated the 7 Series second among large premium cars in their 2018 Initial Quality Study. The CT6 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 BMW vehicles are better in initial quality than Cadillac vehicles. J.D. Power ranks BMW 11th in initial quality, above the industry average. With 3 more problems per 100 vehicles, Cadillac is ranked 12th.

J.D. Power and Associates’ 2019 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 7th in reliability, above the industry average. With 44 more problems per 100 vehicles, Cadillac is ranked 23rd.

From surveys of all its subscribers, Consumer Reports’ December 2018 Auto Issue reports that BMW vehicles are more reliable than Cadillac vehicles. Consumer Reports ranks BMW 20 places higher in reliability than Cadillac.

Engine

The 7 Series has more powerful engines than the CT6:

Horsepower

Torque

740i 3.0 turbo 6 cyl.

335 HP

330 lbs.-ft.

745e 3.0 turbo 6 cyl. hybrid

389 HP

443 lbs.-ft.

750i 4.4 turbo V8

523 HP

553 lbs.-ft.

M760i 6.6 turbo V12

600 HP

627 lbs.-ft.

CT6 2.0 turbo 4 cyl.

265 HP

295 lbs.-ft.

CT6 3.6 DOHC V6

335 HP

285 lbs.-ft.

CT6 3.0 turbo V6

404 HP

400 lbs.-ft.

CT6 V-Sport 4.2 turbo V8

550 HP

627 lbs.-ft.

Fuel Economy and Range

On the EPA test cycle the 745e running on electricity gets better fuel mileage than the CT6 AWD with its standard V6 (52 city/61 hwy MPGe vs. 18 city/27 hwy).

On the EPA test cycle the 745e running its gasoline engine gets better fuel mileage than the CT6 AWD with its standard V6 (19 city/26 hwy vs. 18 city/27 hwy).

On the EPA test cycle the 740i xDrive gets better fuel mileage than the CT6 AWD turbo V6 (20 city/28 hwy vs. 18 city/26 hwy).

The 745e can drive on battery power alone for up to 16 miles. The CT6 must run its internal combustion engine to move.

Regenerative brakes improve the 7 Series’ fuel efficiency by converting inertia back into energy instead of wasting it. The CT6 doesn’t offer a regenerative braking system.

The 7 Series’ standard fuel tank has 1.1 gallons more fuel capacity than the CT6 (20.6 vs. 19.5 gallons).

Brakes and Stopping

For better stopping power the 7 Series’ brake rotors are larger than those on the CT6:

740i/745e

750i

CT6 2.0

CT6 AWD V6

Front Rotors

13.7 inches

15.5 inches

12.6 inches

13.6 inches

Rear Rotors

13.6 inches

14.5 inches

12.4 inches

12.4 inches

The 7 Series stops much shorter than the CT6:

7 Series

CT6

70 to 0 MPH

151 feet

164 feet

Car and Driver

60 to 0 MPH

113 feet

117 feet

Motor Trend

Tires and Wheels

For better traction, the 7 Series has larger standard tires than the CT6 (245/50R18 vs. 235/50R18).

The 7 Series’ optional 275/35R20 rear tires provide better handling because they have a lower 35 series profile (height to width ratio) that provides a stiffer sidewall than the CT6’s optional 40 series tires.

Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires standard on the 7 Series can be driven up to 50 miles without any air pressure, allowing you to drive to a service station for a repair. The CT6 doesn’t offer run-flat tires.

Suspension and Handling

The 7 Series offers active sway bars, which help keep it flat and controlled during cornering, but disconnect at lower speeds to smooth the ride and offer greater off-road suspension articulation. This helps keep the tires glued to the road on-road and off. The CT6 doesn’t offer an active sway bar system.

The front and rear suspension of the 7 Series uses air springs for a smoother, controlled ride than the CT6, which uses coil springs. Air springs maintain proper ride height and ride more smoothly.

The 7 Series 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 CT6.

The 7 Series has a standard automatic front and rear load leveling suspension to keep ride height level with a heavy load or when towing. The 7 Series’ height leveling suspension allows the driver to raise ride height for better off-road clearance and then lower it again for easier entering and exiting and better on-road handling. The CT6 doesn’t offer a load leveling suspension.

For a smoother ride and more stable handling, the 7 Series’ wheelbase is 4 inches longer than on the CT6 (126.4 inches vs. 122.4 inches).

The Alpina B7 handles at .97 G’s, while the CT6 pulls only .81 G’s of cornering force in a Car and Driver skidpad test.

The 750i xDrive executes Motor Trend’s “Figure Eight” maneuver 1.3 seconds quicker than the CT6 (25.4 seconds @ .75 average G’s vs. 26.7 seconds @ .66 average G’s).

Passenger Space

The 7 Series has .9 inches more front shoulder room, .9 inches more rear headroom, 4 inches more rear legroom and 1.5 inches more rear shoulder room than the CT6.

Cargo Capacity

A low lift-over trunk design makes loading and unloading the 7 Series easier. The 7 Series’ trunk lift-over height is 27.2 inches, while the CT6’s liftover is 29.1 inches.

A standard locking glovebox (which can’t be accessed with the valet key) keeps your small valuables safer in the 7 Series. The CT6 doesn’t offer locking storage for small valuables.

Ergonomics

The CT6 Premium Luxury/Platinum/Sport’s cornering lamps activate a lamp on the front corner when the turn signal is activated. The 7 Series’ standard adaptive cornering lights turn the actual headlight unit up to several degrees, depending on steering wheel angle and vehicle speed. This lights a significant distance into corners at any speed.

The 7 Series 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 is only available on the CT6 Premium Luxury/Platinum/Sport.

Economic Advantages

Insurance will cost less for the 7 Series owner. The Car Book by Jack Gillis rates the 7 Series with a number “1” insurance rate while the CT6 is rated higher at a number “3” rate.

According to The Car Book by Jack Gillis, the 7 Series is less expensive to operate than the CT6 because typical repairs cost less on the 7 Series than the CT6, including $3 less for front brake pads.

Recommendations

Consumer Reports® recommends the BMW 7 Series, based on reliability, safety and performance.

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

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