2019 Lexus LS Series vs. 2019 Bentley Mulsanne

Detailed Review, Specifications & Comparison

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Safety

The LS Series’ 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 LS Series has a standard Pre-Collision System, which uses 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 LS Series has standard Secondary Collision Brake, which automatically apply the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The Mulsanne 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.

Over 200 people are killed each year when backed over by motor vehicles. The LS Series has a standard Auto-Stop that use rear sensors to monitor and automatically apply the brakes to prevent a rear collision. The Mulsanne doesn’t offer backup collision prevention brakes.

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

The LS Series’ 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 LS Series offers an optional Panoramic 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 LS Series’ 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 LS 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 Mulsanne doesn’t offer a driver alert monitor.

The LS Series has standard Safety Connect®, which uses a global positioning satellite (GPS) receiver and a cellular system to 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 LS Series and the Mulsanne have standard driver and passenger frontal airbags, front 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

The LS Series 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.

Lexus’ powertrain warranty covers the LS Series 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 LS Series’ corrosion warranty is 3 years longer than the Mulsanne’s (6 vs. 3 years).

There are over 5 times as many Lexus dealers as there are Bentley dealers, which makes it much easier should you ever need service under the LS Series’ warranty.

Reliability

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

Fuel Economy and Range

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

 

 

 

MPG

LS Series

 

RWD

500h 3.5 V6 Hybrid

25 city/33 hwy

 

 

500 3.4 turbo V6

19 city/30 hwy

 

AWD

500h 3.5 V6 Hybrid

23 city/31 hwy

 

 

500 3.4 turbo V6

18 city/27 hwy

Mulsanne

 

RWD

6.8 turbo V8

10 city/16 hwy

 

 

Speed 6.8 turbo V8

10 city/16 hwy

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

In heavy traffic or at stoplights the LS Series Hybrid’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.

Environmental Friendliness

The U.S. Environmental Protection Agency (EPA) certifies the Lexus LS Series as a “Super Ultra Low Emissions Vehicle” (SULEV). The Bentley Mulsanne is only certified to “Low Emissions Vehicle” (LEV) standards.

Transmission

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

The LS 500h has a standard continuously variable transmission (CVT). With no “steps” between gears, it can keep the engine at the most efficient speed for fuel economy, or keep it at its peak horsepower indefinitely for maximum acceleration. The Mulsanne doesn’t offer a CVT.

Tires and Wheels

Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires standard on the LS Series 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

The LS Series F-Sport 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 Mulsanne doesn’t offer an active sway bar system.

For better handling and stability, the average track (width between the wheels) on the LS Series is 1.1 inches wider in the front than the track on the Mulsanne.

The LS 500 handles at .88 G’s, while the Mulsanne pulls only .81 G’s of cornering force in a Car and Driver skidpad test.

The LS 500 AWD executes Motor Trend’s “Figure Eight” maneuver 1.1 seconds quicker than the Mulsanne (25.7 seconds @ .73 average G’s vs. 26.8 seconds @ .69 average G’s).

For better maneuverability, the LS Series’ turning circle is 5.5 feet tighter than the Mulsanne’s (36.8 feet vs. 42.3 feet). The LS Series AWD’s turning circle is 2.9 feet tighter than the Mulsanne’s (39.4 feet vs. 42.3 feet).

Chassis

The Lexus LS Series may be more efficient, handle and accelerate better because it weighs about 950 to 1250 pounds less than the Bentley Mulsanne.

The LS Series is 1 foot, 1.4 inches shorter than the Mulsanne, making the LS Series easier to handle, maneuver and park in tight spaces.

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

Cargo Capacity

The LS Series has a much larger trunk than the Mulsanne (17 vs. 15.75 cubic feet).

To make loading groceries and cargo easier when your hands are full, the LS Series’ 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

The LS Series 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.

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

Standard smartphone integration for the LS Series allows the driver and passengers access to select programs on their smartphones, including reading text messages aloud, playing internet radio stations, finding fuel prices at nearby service stations, searching the internet 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.

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

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