2019 Cadillac CT6 vs. 2019 Bentley Mulsanne

Detailed Review, Specifications & Comparison

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The CT6’s optional pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The Mulsanne doesn’t offer pre-crash pretensioners.

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 Mulsanne doesn’t offer a back seat reminder.

The CT6 offers optional Forward Automatic Braking, which use forward mounted sensors to warn the driver of a possible collision ahead. If the driver doesn’t react and the system determines a collision is imminent, it automatically applies the brakes at full-force in order to reduce the force of the crash or avoid it altogether. The Mulsanne doesn't offer collision warning or crash mitigation brakes.

Over 200 people are killed each year when backed over by motor vehicles. The CT6 Premium Luxury/Platinum/Sport has standard Reverse Automatic Braking that uses rear sensors to monitor and automatically apply the brakes to prevent a rear collision. The Mulsanne doesn’t offer backup collision prevention brakes.

The CT6 offers all-wheel drive to maximize traction under poor conditions, especially in ice and snow. The Mulsanne doesn’t offer all-wheel drive.

An active infrared night vision system optional on the CT6 helps the driver to more easily detect people, animals or other objects in front of the vehicle at night. Using an infrared camera and near-infrared lights to detect heat, the system then displays the image on a monitor in the dashboard. The Mulsanne doesn’t offer a night vision system.

The CT6’s optional lane departure warning system alerts a temporarily inattentive driver when the vehicle begins to leave its lane and gently nudges the vehicle back towards its lane. The Mulsanne doesn’t offer a lane departure warning system.

The CT6 Premium Luxury/Platinum/Sport has a standard Surround Vision to allow the driver to see objects all around the vehicle on a screen. The Mulsanne only offers a rear monitor and front and rear parking sensors that beep or flash a light. That doesn’t help with obstacles to the sides.

To help make backing safer, the CT6’s optional 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 Mulsanne doesn’t offer a cross-path warning system.

The CT6 has standard OnStar®, which uses a global positioning satellite (GPS) receiver and a cellular system to get turn-by-turn driving directions, remotely unlock your doors if you lock your keys in, help track down your vehicle if it’s stolen or send emergency personnel to the scene if any airbags deploy. The Mulsanne doesn’t offer a GPS response system, only a navigation computer with no live response for emergencies, so if you’re involved in an accident and you’re incapacitated help may not come as quickly.

Both the CT6 and the Mulsanne have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, front seatbelt pretensioners, height adjustable front shoulder belts, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights, rearview cameras and available blind spot warning systems.


The CT6 comes with a full 4-year/50,000-mile basic warranty, which covers the entire car and includes 24-hour roadside assistance. The Mulsanne’s 3-year basic warranty expires 1 year sooner.

Cadillac’s powertrain warranty covers the CT6 3 years longer than Bentley covers the Mulsanne. Any repair needed on the engine, transmission, axles, joints or driveshafts is fully covered for 6 years or 70,000 miles. Coverage on the Mulsanne ends after only 3 years.

The CT6’s corrosion warranty is 3 years longer than the Mulsanne’s (6 vs. 3 years).

Cadillac pays for the first scheduled maintenance on the CT6. Cadillac will pay for an oil change, lubrication and any other required maintenance. Bentley doesn’t pay scheduled maintenance for the Mulsanne.

There are over 20 times as many Cadillac dealers as there are Bentley dealers, which makes it much easier should you ever need service under the CT6’s warranty.


For smoother operation, better efficiency and fewer moving parts, the engines in the CT6 have an overhead cam design, rather than the old pushrod design of the engines in the Mulsanne.


The CT6 V-Sport’s 4.2 turbo V8 produces 20 more horsepower (550 vs. 530) than the Mulsanne Speed’s optional 6.8 turbo V8.

Fuel Economy and Range

On the EPA test cycle the CT6 gets better fuel mileage than the Mulsanne:








2.0 turbo 4 cyl.

24 city/34 hwy



3.6 DOHC V6

18 city/27 hwy



3.0 turbo V6

18 city/26 hwy




6.8 turbo V8

10 city/16 hwy



Speed 6.8 turbo V8

10 city/16 hwy

In heavy traffic or at stoplights the CT6’s engine automatically turns off when the vehicle is stopped, saving fuel and reducing pollution. The engine is automatically restarted when the driver gets ready to move again. (Start/Stop isn’t accounted in present EPA fuel mileage tests.) The Mulsanne doesn’t offer an automatic engine start/stop system.

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 Mulsanne doesn’t offer a cap-less fueling system.

Environmental Friendliness

In its Green Vehicle Guide, the U.S. Environmental Protection Agency (EPA) rates the Cadillac CT6 higher (3 to 5 out of 10) than the Bentley Mulsanne (1). This means the CT6 produces up to 39 pounds less smog-producing pollutants than the Mulsanne every 15,000 miles.


A 10-speed automatic is standard on the Cadillac CT6, for better acceleration and lower engine speed on the highway. Only an eight-speed automatic is available for the Mulsanne.

Brakes and Stopping

The CT6 stops much shorter than the Mulsanne:





70 to 0 MPH

152 feet

165 feet

Car and Driver

60 to 0 MPH

106 feet

110 feet

Motor Trend

Suspension and Handling

The CT6 AWD handles at .86 G’s, while the Mulsanne pulls only .81 G’s of cornering force in a Car and Driver skidpad test.

The CT6 AWD executes Motor Trend’s “Figure Eight” maneuver 1.4 seconds quicker than the Mulsanne (25.4 seconds @ .75 average G’s vs. 26.8 seconds @ .69 average G’s).

For better maneuverability, the CT6’s turning circle is 2.3 feet tighter than the Mulsanne’s (40 feet vs. 42.3 feet).


The Cadillac CT6 may be more efficient, handle and accelerate better because it weighs about 1650 to 2250 pounds less than the Bentley Mulsanne.

The CT6 is 1 foot, 1.7 inches shorter than the Mulsanne, making the CT6 easier to handle, maneuver and park in tight spaces.

For excellent aerodynamics, the CT6 has standard flush composite headlights. The Mulsanne has recessed headlights that spoil its aerodynamic shape and create extra drag.

The front grille of the CT6 uses electronically controlled shutters to close off airflow and reduce drag when less engine cooling is needed. This helps improve highway fuel economy. The Mulsanne doesn’t offer active grille shutters.

Passenger Space

The CT6 has 15.2 cubic feet more passenger volume than the Mulsanne (121.2 vs. 106).

The CT6 has .1 inches more front headroom, 4.5 inches more front legroom and 2.8 inches more front shoulder room than the Mulsanne.

Cargo Capacity

To make loading groceries and cargo easier when your hands are full, the CT6’s trunk can be opened and closed just by kicking your foot under the back bumper, leaving your hands completely free. The Mulsanne doesn’t offer a hands-free gesture to open its trunk, forcing you to put cargo down if your hands are full.


The CT6 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 Mulsanne doesn’t offer a remote starting system.

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 Mulsanne 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 Mulsanne doesn’t offer extendable visors.

Standard Cadillac User Experience for the CT6 allows the driver and passengers access to select programs on their smartphones, including reading text messages aloud, playing internet radio stations and other connected activities without taking their eyes off the road or their hands from the wheel. The Mulsanne doesn’t offer factory integrated smartphone program access.

The CT6 Premium Luxury/Platinum/Sport’s Automatic Park Assist can parallel park or back into a parking spot by itself, with the driver only controlling speed with the brake pedal. The Mulsanne doesn’t offer an automated parking system.

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

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