2020 Lexus LS Series vs. 2020 Cadillac CT6

Detailed Review, Specifications & Comparison

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Safety

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For enhanced safety, the front and rear seat shoulder belts of the Lexus LS Series have pretensioners to tighten the seatbelts and eliminate dangerous slack in the event of a collision and force limiters to limit the pressure the belts will exert on the passengers. The Cadillac CT6 doesn’t offer pretensioners for the rear seat belts.

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 CT6 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.

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 CT6 doesn’t offer a driver alert monitor.

Both the LS 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, height-adjustable front shoulder belts, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, lane departure warning systems, blind spot warning systems, rearview cameras, rear cross-path warning, available all-wheel drive and around view monitors.

Reliability

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A reliable vehicle saves its owner time, money and trouble. Nobody wants to be stranded or have to be without a vehicle while it’s being repaired. Consumer Reports rates the LS Series’ reliability 60 points higher than the CT6.

J.D. Power and Associates’ 2019 Initial Quality Study of new car owners surveyed provide the statistics that show that Lexus vehicles are better in initial quality than Cadillac vehicles. J.D. Power ranks Lexus 8th in initial quality, above the industry average. With 10 more problems per 100 vehicles, Cadillac is ranked 17th, below the industry average.

J.D. Power and Associates’ 2019 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Lexus vehicles are more reliable than Cadillac vehicles. J.D. Power ranks Lexus first in reliability, above the industry average. With 60 more problems per 100 vehicles, Cadillac is ranked 23rd.

From surveys of all its subscribers, Consumer Reports’ December 2018 Auto Issue reports that Lexus vehicles are more reliable than Cadillac vehicles. Consumer Reports ranks Lexus first in reliability. Cadillac is ranked 28th.

Engine

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The LS 500h’s standard 3.5 DOHC V6 hybrid produces 19 more horsepower (354 vs. 335) than the CT6’s standard 3.6 DOHC V6.

Fuel Economy and Range

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On the EPA test cycle the LS 500h AWD gets better fuel mileage than the CT6 (23 city/31 hwy vs. 18 city/27 hwy).

Regenerative brakes improve the LS Series Hybrid’s fuel efficiency by converting inertia back into energy instead of wasting it. The CT6 doesn’t offer a regenerative braking system.

The LS Series’ standard fuel tank has 2.5 gallons more fuel capacity than the CT6 (21.7 vs. 19.2 gallons), for longer range between fill-ups. The LS Series Hybrid’s standard fuel tank has 3 gallons more fuel capacity than the CT6 (22.2 vs. 19.2 gallons).

Transmission

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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 CT6 doesn’t offer a CVT.

Brakes and Stopping

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

LS Series

LS Series F-Sport

CT6 AWD

CT6 Platinum

Front Rotors

14 inches

15.7 inches

13.6 inches

14.6 inches

Rear Rotors

13.1 inches

14.1 inches

12.4 inches

13.3 inches

Tires and Wheels

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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 CT6 doesn’t offer run-flat tires.

Suspension and Handling

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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 CT6 doesn’t offer an active sway bar system.

The LS Series has a standard automatic front and rear load leveling suspension to keep ride height level with a heavy load or when towing. The LS 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 better maneuverability, the LS Series’ turning circle is 3.2 feet tighter than the CT6’s (36.8 feet vs. 40 feet). The LS Series AWD’s turning circle is .6 feet tighter than the CT6’s (39.4 feet vs. 40 feet).

Passenger Space

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The LS Series has .5 inches more front shoulder room, 1.6 inches more rear hip room and .2 inches more rear shoulder room than the CT6.

Cargo Capacity

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The LS Series has a much larger trunk than the CT6 (17 vs. 15.8 cubic feet).

Servicing Ease

© 1999 - 2019 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2019/11/20

J.D. Power and Associates surveys of service recipients show that Lexus service is better than Cadillac. J.D. Power ranks Lexus second in service department satisfaction. With a 1% lower rating, Cadillac is ranked third.

Ergonomics

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In poor weather, headlights can lose their effectiveness as grime builds up on their lenses. This can reduce visibility without the driver realizing. The LS Series offers available headlight washers to keep headlight output high. The CT6 doesn’t offer headlight washers.

The CT6 Premium Luxury/Platinum’s cornering lamps activate a lamp on the front corner when the turn signal is activated. The LS Series’ optional 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.

The LS Series offers an optional 115-volt a/c outlet on the center console, allowing you to recharge a laptop or run small household appliances without special adapters that can break or get misplaced. The CT6 doesn’t offer a house-current electrical outlet.

Model Availability

© 1999 - 2019 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. 6IUEX-0KENZ 45.55.47.189 2019/11/20

The LS Series is available in both rear-wheel drive and all-wheel drive configurations. The CT6 doesn’t offer a two-wheel drive configuration.

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