2020 Mercedes AMG S-Class vs. 2019 Bentley Mulsanne

Detailed Review, Specifications & Comparison

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Safety

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The AMG S-Class’ 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.

The AMG S-Class has standard NECK-PRO Front Head Restraints, which use a specially designed headrest to protect the driver and front passenger from whiplash. During a rear-end collision, the NECK-PRO Front Head Restraints system moves the headrests forward to prevent neck and spine injuries. The Mulsanne doesn’t offer a whiplash protection system.

The AMG S-Class has standard Active Brake Assist, 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.

The AMG S 63 Sedan has 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 AMG S-Class 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 AMG S-Class’ 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 AMG S-Class offers an optional Surround View Camera 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 AMG S-Class’ 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 AMG S-Class’ 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 Mulsanne doesn’t offer a driver alert monitor.

The AMG S-Class has standard Mercedes-Benz Emergency Call, which uses a global positioning satellite (GPS) receiver and a cellular system to 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 AMG S-Class and the Mulsanne have standard driver and passenger frontal airbags, front and rear side-impact airbags, side-impact head airbags, front and rear seatbelt pretensioners, height adjustable front shoulder belts, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights, blind spot warning systems and rearview cameras.

Warranty

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The AMG S-Class 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.

The AMG S-Class’ corrosion warranty is 2 years longer than the Mulsanne’s (5 vs. 3 years).

There are over 8 times as many Mercedes dealers as there are Bentley dealers, which makes it much easier should you ever need service under the AMG S-Class’ warranty.

Reliability

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

Engine

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The AMG S 63 Sedan’s standard 4.0 turbo V8 produces 98 more horsepower (603 vs. 505) than the Mulsanne’s standard 6.8 turbo V8. The AMG S 63 Sedan’s 4.0 turbo V8 produces 73 more horsepower (603 vs. 530) than the Mulsanne Speed’s standard 6.8 turbo V8. The AMG S 65 Sedan’s standard 6.0 turbo V12 produces 91 more horsepower (621 vs. 530) than the Mulsanne Speed’s standard 6.8 turbo V8.

Fuel Economy and Range

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On the EPA test cycle the AMG S-Class gets better fuel mileage than the Mulsanne:

MPG

AMG S-Class

RWD

65 6.0 turbo V12

13 city/22 hwy

AWD

63 4.0 turbo V8

17 city/26 hwy

Mulsanne

RWD

6.8 turbo V8

10 city/16 hwy

In heavy traffic or at stoplights the AMG S-Class’ 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.

Environmental Friendliness

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

Transmission

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A nine-speed automatic is standard on the Mercedes AMG S-Class, for better acceleration and lower engine speed on the highway. Only an eight-speed automatic is available for the Mulsanne.

The AMG S-Class’ launch control uses engine electronics to hold engine RPM’s precisely in order to provide the most stable and rapid acceleration possible, using all of the available traction. The Mulsanne doesn’t offer launch control.

Brakes and Stopping

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For better stopping power the AMG S-Class’ optional front brake rotors are larger than those on the Mulsanne:

AMG S-Class

Mulsanne

Front Rotors

16.5 inches

15.7 inches

The AMG S-Class 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 Mulsanne doesn’t offer ceramic brake rotors.

Tires and Wheels

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For better traction and acceleration, the AMG S-Class has larger rear tires than the Mulsanne (285/40R20 vs. 265/45R20).

The AMG S-Class’ standard 285/40R20 rear tires provide better handling because they have a lower 40 series profile (height to width ratio) that provides a stiffer sidewall than the Mulsanne’s standard 45 series tires. The AMG S 65 Sedan’s 285/35R20 rear tires have a lower 35 series profile than the Mulsanne’s optional 40 series tires.

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

Suspension and Handling

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The AMG S 65 Sedan offers an available adjustable active suspension system, which counteracts cornering forces actively, limiting body roll and improving handling and stability. Bentley doesn’t offer an active suspension on the Mulsanne.

The AMG S-Class’ drift compensation steering can automatically compensate for road conditions which would cause the vehicle to drift from side to side, helping the driver to keep the vehicle straight more easily. The Mulsanne doesn’t offer drift compensation steering.

For better handling and stability, the average track (width between the wheels) on the AMG S-Class is 1.3 inches wider in the front than the track on the Mulsanne.

For better maneuverability, the AMG S 65 Sedan’s turning circle is 4.2 feet tighter than the Mulsanne’s (38.1 feet vs. 42.3 feet).

Chassis

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The Mercedes AMG S-Class may be more efficient, handle and accelerate better because it weighs about 1100 to 1150 pounds less than the Bentley Mulsanne.

The AMG S-Class is 11 inches shorter than the Mulsanne, making the AMG S-Class easier to handle, maneuver and park in tight spaces.

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

Passenger Space

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The AMG S-Class has 6 cubic feet more passenger volume than the Mulsanne (112 vs. 106).

The AMG S-Class Sedan has 4.2 inches more front shoulder room and 1.6 inches more rear shoulder room than the Mulsanne.

Cargo Capacity

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The AMG S-Class Sedan has a much larger trunk than the Mulsanne (18 vs. 15.75 cubic feet).

A low lift-over trunk design makes loading and unloading the AMG S-Class easier. The AMG S-Class’ trunk lift-over height is 27.4 inches, while the Mulsanne’s liftover is 29.8 inches.

To make loading groceries and cargo easier when your hands are full, the AMG S-Class’ 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.

Ergonomics

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The AMG S-Class 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.

Heated windshield washer fluid is standard on the AMG S-Class to defrost the washer nozzles and quickly clear ice and frost from the windshield without scraping. The Mulsanne doesn’t offer heated windshield washer fluid.

To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the Mercedes AMG S-Class has a standard wireless phone charging system (Qi) in the center console and for the rear passengers. The Mulsanne doesn’t offer wireless personal charging.

The AMG S-Class’ Active Parking Assist can parallel park or back into a parking spot by itself, starting, stopping and changing direction automatically. The Mulsanne doesn’t offer an automated parking system.

Model Availability

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The Mercedes AMG S-Class comes in coupe, convertible and sedan bodystyles; the Bentley Mulsanne isn’t available as a coupe or convertible.

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