Son's Automotive Group Compares 2016 BMW 7 SERIES VS 2016 Cadillac CT6 Near Norcross, GA

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2016 Cadillac CT6

Safety Comparison

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, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights, rearview cameras, available crash mitigating brakes, night vision systems, lane departure warning systems, blind spot warning systems, around view monitors and rear cross-path warning.

Warranty Comparison

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

Reliability Comparison

J.D. Power and Associates’ 2015 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 23 more problems per 100 vehicles, Cadillac is ranked 21st, below the industry average.

Engine Comparison

The 7 Series has more powerful engines than the CT6:



740i 3.0 turbo 6 cyl.

320 HP

330 lbs.-ft.

750i 4.4 turbo V8

445 HP

480 lbs.-ft.

CT6 2.0 turbo 4 cyl.

272 HP

295 lbs.-ft.

CT6 3.6 DOHC V6

335 HP

285 lbs.-ft.

CT6 3.0 turbo V6

404 HP

400 lbs.-ft.

As tested in Motor Trend the 750i 4.4 turbo V8 is faster than the Cadillac CT6 twin turbo V6:

7 Series


Zero to 60 MPH

4.3 sec

5 sec

Quarter Mile

12.7 sec

13.4 sec

Speed in 1/4 Mile

111.9 MPH

105 MPH

Fuel Economy and Range Comparison

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 has 1.4 gallons more fuel capacity than the CT6 (20.6 vs. 19.2 gallons), for longer range between fill-ups.

Brakes and Stopping Comparison

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



CT6 2.0

CT6 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

Tires and Wheels Comparison

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

For better ride, handling and brake cooling the 7 Series offers optional 21-inch wheels. The CT6’s largest wheels are only 20-inches.

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 Comparison

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 750i xDrive handles at .88 G’s, while the CT6 AWD pulls only .86 G’s of cornering force in a Car and Driver skidpad test.

Chassis Comparison

As tested by Car and Driver, the interior of the 750i xDrive is quieter than the CT6 AWD:

7 Series


At idle

38 dB

49 dB


72 dB

73 dB

Passenger Space Comparison

The 7 Series has .7 inches more front headroom, .9 inches more front shoulder room, .9 inches more rear headroom, 4 inches more rear legroom and 1.6 inches more rear shoulder room than the CT6.

Cargo Capacity Comparison

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.

Ergonomics Comparison

The 7 Series offers a 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 CT6 doesn’t offer a remote starting system.

The 7 Series’ 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 CT6’s standard intermittent wipers change speed with vehicle speed, but can’t turn on and off or change speed based on changing rainfall.

The CT6 Luxury/Premium/Platinum’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.

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