2018 Cadillac CT6 vs. 2018 BMW 7 Series

Detailed Review, Specifications & Comparison

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For enhanced safety, the front seat shoulder belts of the Cadillac CT6 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 7 Series doesn’t offer height-adjustable seat belts.

In the past twenty years hundreds of infants and young children have died after being left in vehicles, usually by accident. When turning the vehicle off, drivers of the CT6 are reminded to check the back seat if they opened the rear door before starting out. The 7 Series doesn’t offer a back seat reminder.

Both the CT6 and the 7 Series 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 crash mitigating brakes, night vision systems, lane departure warning systems, blind spot warning systems, around view monitors and rear cross-path warning.


Cadillac’s powertrain warranty covers the CT6 2 years and 20,000 miles longer than BMW covers the 7 Series. Any repair needed on the engine, transmission, axles, joints or driveshafts is fully covered for 6 years or 70,000 miles. Coverage on the 7 Series ends after only 4 years or 50,000 miles.

There are almost 3 times as many Cadillac dealers as there are BMW dealers, which makes it much easier should you ever need service under the CT6’s warranty.

Fuel Economy and Range

An engine control system that can shut down half of the engine’s cylinders helps improve the CT6 V6’s fuel efficiency. The 7 Series doesn’t offer a system that can shut down part of the engine.

The CT6 has 7.1 gallons more fuel capacity than the 7 Series Hybrid’s standard fuel tank (19.2 vs. 12.1 gallons), for longer range between fill-ups.

The CT6 has a standard cap-less fueling system. The fuel filler is automatically opened when the fuel nozzle is inserted and automatically closed when it’s removed. This eliminates the need to unscrew and replace the cap and it reduces fuel evaporation, which causes pollution. The 7 Series doesn’t offer a cap-less fueling system.

Brakes and Stopping

The CT6 stops shorter than the 7 Series:



7 Series


70 to 0 MPH

152 feet

161 feet

Car and Driver

60 to 0 MPH

106 feet

113 feet

Motor Trend

Suspension and Handling

For better maneuverability, the CT6’s turning circle is 2 feet tighter than the 740i’s (40 feet vs. 42 feet). The CT6’s turning circle is 2.3 feet tighter than the 750i’s (40 feet vs. 42.3 feet).


The Cadillac CT6 may be more efficient, handle and accelerate better because it weighs about 550 to 750 pounds less than the BMW 7 Series.

The CT6 offers available computer-generated active noise cancellation to help remove annoying noise and vibration from the passenger compartment, especially at low frequencies. The 7 Series doesn’t offer active noise cancellation.

As tested by Car and Driver while cruising at 70 MPH, the interior of the CT6 is quieter than the 750i xDrive (66 vs. 68 dB).

Passenger Space

The CT6 has 7.2 cubic feet more passenger volume than the 7 Series (121.2 vs. 114).

The CT6 has .2 inches more front headroom and 1 inch more front legroom than the 7 Series.

Cargo Capacity

The CT6 has a much larger trunk than the 7 Series (15.3 vs. 14 cubic feet).


The CT6 has a 1000 lbs. towing capacity. The 7 Series has no towing capacity.


The CT6’s instruments include an oil pressure gauge and a temperature gauge – which could save your engine! Often ‘idiot lights’ don’t warn you until damage has been done. The 7 Series does not have an oil pressure gauge.

To shield the driver and front passenger’s vision over a larger portion of the windshield and side windows, the CT6 has standard extendable sun visors. The 7 Series doesn’t offer extendable visors.

The CT6 Luxury/Premium/Platinum has a 115-volt a/c outlet, allowing you to recharge a laptop or run small household appliances without special adapters that can break or get misplaced. The 7 Series doesn’t offer a house-current electrical outlet.

Economic Advantages

Insurance will cost less for the CT6 owner. The Complete Car Cost Guide estimates that insurance for the CT6 will cost $1995 to $7040 less than the 7 Series over a five-year period.

The CT6 will cost the buyer less in the long run because of its superior resale value. The IntelliChoice estimates that the CT6 will retain 37.58% to 37.79% of its original price after five years, while the 7 Series only retains 34.03% to 36.68%.

IntelliChoice estimates that five-year ownership costs (depreciation, financing, insurance, fuel, fees, repairs and maintenance) for the Cadillac CT6 will be $24547 to $70442 less than for the BMW 7 Series.

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

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