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The Quattroporte has standard whiplash protection, which use a specially designed headrest to protect the driver and front passenger from whiplash. During a rear-end collision, the whiplash protection system moves the headrests forward to prevent neck and spine injuries. The CT5 doesn’t offer a whiplash protection system.
Both the Quattroporte and the CT5 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, crash mitigating brakes, daytime running lights and rearview cameras.
The Quattroporte S’ standard 3.0 turbo V6 produces 187 more horsepower (424 vs. 237) and 170 lbs.-ft. more torque (428 vs. 258) than the CT5’s standard 2.0 turbo 4-cylinder. The Quattroporte S’ 3.0 turbo V6 produces 89 more horsepower (424 vs. 335) and 28 lbs.-ft. more torque (428 vs. 400) than the CT5’s optional 3.0 turbo V6. The Quattroporte GTS’ standard 3.8 turbo V8 produces 188 more horsepower (523 vs. 335) and 124 lbs.-ft. more torque (524 vs. 400) than the CT5’s optional 3.0 turbo V6.
The Quattroporte has 4 gallons more fuel capacity than the CT5 (21 vs. 17 gallons), for longer range between fill-ups.
For better stopping power the Quattroporte’s brake rotors are larger than those on the CT5:
The Quattroporte’s standard front and rear disc brakes are vented to help dissipate heat for shorter stops with less fading. The rear discs on the CT5 are solid, not vented.
For better traction and acceleration, the Quattroporte has larger standard rear tires than the CT5 (275/40R19 vs. 245/45R18). The Quattroporte’s optional rear tires are larger than the largest rear tires available on the CT5 (285/35R20 vs. 245/45R18).
The Quattroporte’s standard 275/40R19 rear tires provide better handling because they have a lower 40 series profile (height to width ratio) that provides a stiffer sidewall than the CT5’s standard 45 series tires. The Quattroporte’s optional 245/35R21 front and 285/30R21 rear tires have a lower 35 series front and 30 series rear profile than the CT5’s optional 40 series tires.
For better ride, handling and brake cooling the Quattroporte has standard 19-inch wheels. Smaller 18-inch wheels are standard on the CT5. The Quattroporte’s optional 21-inch wheels are larger than the 19-inch wheels optional on the CT5.
The Quattroporte has a standard space-saver spare tire so you can replace a flat tire and drive to have the flat repaired or replaced. A spare tire isn’t available on the CT5; it requires you to depend on its optional run-flat tires, which limits mileage and speed before they are repaired. If a run-flat is damaged beyond repair by a road hazard your vehicle will have to be towed.
The Quattroporte has a standard driver-adjustable suspension system. It allows the driver to choose between an extra-supple ride, reducing fatigue on long trips, or a sport setting, which allows maximum control for tricky roads. The CT5’s suspension doesn’t offer adjustable shock absorbers.
The Quattroporte’s 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 CT5 doesn’t offer drift compensation steering.
For a smoother ride and more stable handling, the Quattroporte’s wheelbase is 8.8 inches longer than on the CT5 (124.8 inches vs. 116 inches).
For better handling and stability, the track (width between the wheels) on the Quattroporte is 1.5 inches wider in the front and .9 inches wider in the rear than on the CT5.
For better maneuverability, the Quattroporte’s turning circle is .3 feet tighter than the CT5’s (38.7 feet vs. 39 feet). The Quattroporte’s turning circle is 2 feet tighter than the CT5 AWD’s (38.7 feet vs. 40.7 feet).
The Quattroporte has 11.1 inches more front hip room, 7.6 inches more front shoulder room, 1.2 inches more rear headroom and 4.1 inches more rear hip room than the CT5.
For enhanced passenger comfort on long trips the Quattroporte’s available rear seats recline. The CT5’s rear seats don’t recline.
The Quattroporte has a much larger trunk than the CT5 (18.7 vs. 11.9 cubic feet).
To make loading and unloading groceries and cargo easier, especially for short adults, the Quattroporte has a standard power trunk, which opens and closes automatically by pressing a button or just by kicking your foot under the back bumper, completely leaving your hands free. The CT5 doesn’t offer a power trunk, so its trunk has to be closed manually.
Heated windshield washer nozzles are standard on the Quattroporte to prevent washer fluid and nozzles from freezing and help continue to keep the windshield clear in sub-freezing temperatures. The CT5 doesn’t offer heated windshield washer nozzles.
In poor weather, headlights can lose their effectiveness as grime builds up on their lenses. This can reduce visibility without the driver realizing. The Quattroporte has standard headlight washers to keep headlight output high. The CT5 doesn’t offer headlight washers.
The CT5 Premium Luxury/Sport’s optional cornering lamps activate a lamp on the front corner when the turn signal is activated. The Quattroporte’s standard 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.
A power rear sunshade and rear side window sunshades are standard in the Quattroporte to help block heat and glare for the rear passengers. The CT5 doesn’t offer a rear or rear side window sunshades.
The Quattroporte has standard heated front seats. Heated front seats cost extra on the CT5. The Quattroporte also offers optional heated rear seats to keep those passengers extremely comfortable in the winter. Heated rear seats aren’t available in the CT5.
Optional air conditioned front and rear seats keep the Quattroporte’s passengers comfortable and take the sting out of hot leather in summer. The CT5 doesn’t offer air-conditioned seats in the rear.
The Quattroporte has a standard heated steering wheel to take the chill out of steering on extremely cold winter days before the car heater warms up. A heated steering wheel costs extra on the CT5.
The Quattroporte 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 CT5 doesn’t offer a house-current electrical outlet.
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