Buick Regal GS Vs. Cadillac CTS: Midsize Luxury Sport Sedan Showdown

By Justin Cupler | October 1st, 2018

Whether you’re commuting to Port St. Lucie, Florida for work or heading to Vero Beach, or Fort Pierce for a little R&R, make your ride an exciting one in the 2019 Buick Regal GS sports sedan. This performance-oriented luxury midsize sedan has tons to offer, but can it take down the mighty Cadillac CTS? Keep reading to find out.

Exterior

The 2019 Cadillac CTS is 195.5 inches long and rides on a 114.6-inch wheelbase, making it 2.6 inches longer than the 2019 Buick Regal GS. And its 3.2-inch-longer wheelbase provides a smoother ride on rough roads.

The 2019 Buick Regal GS, however, is 73.3 inches wide, which makes it 1.1 inches wider than the CTS. This wider stance gives the Regal GS more grip in the corners. Plus, at 57.3 inches high, the 2019 Regal GS is 0.1 inches taller. The Regal GS’ shorter length also makes zipping through traffic and fitting in tight parking spaces simpler.

Stylistically, the two couldn’t differ more. The 2019 Cadillac CTS boasts distinctly American looks with hard body lines, vertical headlights, and a defined three-box silhouette. The Regal GS, on the other hand, takes on a swoopier European flare with sleek lines, sportback silhouette and signature waterfall grille. The Regal GS also has a few performance cues, like its painted brake calipers and large bumper air inlets.

Advantage: 2019 Cadillac CTS

  • Longer wheelbase delivers smoother ride
  • Larger body offer bigger cabin
  • Sharp body with plenty of angles

Advantage: 2019 Buick Regal GS

  • Sporty cues
  • Swoopy sportback styling
  • Distinctly European

Interior

With its larger footprint, some of the 2019 Cadillac CTS’ interior measurements are larger than the Regal GS. Its front seats offer 40.4 inches of headroom and 45.7 inches of legroom, giving a little more room for taller buyers. But this is where the larger CTS’ advantages stop.

The 2019 Regal GS’ front seats boast 56.9 inches of shoulder room, matching the CTS. With 55.2 inches of hip room, the Regal GS beats the CTS by 1.4 inches. In the rear, the 2019 Buick Regal GS beats the CTS in most measurables. It features 36.9 inches of legroom, 55.4 inches of shoulder room, and 54.1 inches of hip room. These measurements best the 2019 CTS by 1.5 inches of legroom, 0.6 inches of shoulder room, and 0.8 inches of hip room. The only measurement the Regal GS misses the mark in is rear headroom, where its 0.1 lower than the CTS.

The Regal GS shows off why Buick opted for a sportback design with its massive 31.5 cubes of cargo room with the seats up. This crushes the Cadillac CTS’ 13.7 cubes. With the seats folded, the Regal GS’ cargo room explodes to 60.7 cubic feet.

The Regal GS also shows off its sporting attitude inside with its racing seats that feature “GS” logos and grippy bolsters.

Advantage: 2019 Cadillac CTS

  • Roomier front seats

Advantage: 2019 Buick Regal GS

  • Tons more space in the rear seats
  • Huge cargo area
  • Sport racing seats

Performance

The Cadillac CT6 features a wider selection of engines that starts with a 2.0-liter turbocharged four-cylinder that injects 268 horsepower. A potent 335-horsepower 3.6-liter V-6 powerplant is available for those looking for more giddy up. For true performance, there is the V-Sport model and its 420-horsepower twin-turbocharged 3.6-liter V-6 engine. The 3.6-liter V-6 gets the CTS to 60 mph in 5.5 seconds, while the twin-turbo V-6 cuts this time to just 4.6 seconds. The base four-cylinder can hit highway speeds in the low-6-second range.

The 2019 Regal GS is a performance sedan, so there is only one engine option: a 3.6-liter V-6 with 310 horsepower. This power works its way through a nine-speed automatic transmission and out to all four wheels for a sub-6-second 0-to-60 sprint. Yes, this falls behind the V-6 Cadillacs, but its suspension is better tuned for twisties, and its standard all-wheel drive is a benefit the Caddy charges for.

With its available four-cylinder engine and standard rear-wheel drive, the Cadillac CTS gets better fuel economy in some trims. Without all-wheel drive, the Caddy ranges from 19 to 22 mpg city and 29 to 30 mpg highway to the Regal GS’ 19 mpg city and 27 highway. But when we go apples to apples and compare the CTS with the 3.6-liter V-6 and all-wheel drive to the Regal GS, the Cadillac comes up short at 18 mpg city and 26 highway.

Advantage: Cadillac CTS

  • More engine options
  • Higher peak fuel economy
  • Standard rear-wheel drive gives a sports sedan feel

Advantage: Buick Regal GS

  • Better apples-to-apples fuel economy
  • Standard all-wheel drive
  • Lots of performance-oriented upgrades

Pricing and Features

The 2019 Buick Regal GS is a trim level in itself, so there are no trims to choose. The Regal GS starts from a relatively affordable $39,995.

The 2019 Cadillac CTS has five trims: base, Luxury, Premium Luxury, V-Sport, V-Sport Premium Luxury.

2019 Cadillac CTS Key Features and Pricing by Trim

Base: $47,490

  • 2.0-liter turbocharged four-cylinder engine
  • Eight-speed automatic transmission
  • Automatic stop/start
  • Dual exhaust with bright tips
  • Electronic parking brake
  • Brembo front brakes
  • Daytime running lights
  • Keyless ignition
  • Sport-tuned suspension
  • 17-inch 10-spoke painted alloy wheels
  • Active-aero grille
  • Memory package
  • Power mirrors with heat
  • Projector-beam headlights
  • Rear Park Assist
  • 5.7-inch color driver information display
  • Ambient interior lighting
  • Bluetooth connectivity with audio streaming
  • Bose 11-speaker audio system
  • Eight-way power front seats
  • Dual-zone auto climate control
  • Auto-dimming rearview mirror
  • Leather-wrapped steering
  • Rearview camera
  • Remote engine start
  • Leatherette seating
  • SiriusXM
  • Universal home remote
  • Wireless charging pad

Luxury: $53,190

  • All base features, plus
  • 17-inch 10-spoke ultra-bright wheels with dark-painted pockets
  • Forward-collision alert
  • Following-distance indicator
  • Lane-keep assist
  • Lane-departure warning
  • Lane-change alert
  • Blind-spot warning
  • Rear cross-traffic alert
  • Safety-alert rear seat
  • Rain-sensing wipers
  • Adaptive headlights
  • HID headlights
  • Auto-dimming side-view mirrors
  • Leather seats
  • Heated and ventilated front seats
  • Split-folding rear seats
  • Automatic heated steering wheel
  • LED ambient lighting
  • Power tilt-and-telescoping steering wheel
  • Power sunroof
  • Bose 13-speaker sound system

Premium Luxury: $60,690

  • All Luxury features, plus
  • 3.6-liter V-6 engine
  • 18-inch 15-spoke alloy wheels
  • Magnetic ride control
  • 360-degree camera
  • Automatic parking assist
  • Rear-camera mirror
  • Illuminated door handles
  • Tri-zone climate control
  • Head-up display
  • Heated rear outboard seats
  • Power rear sunshade
  • Manual rear side-window sunshades
  • 110-volt power outlet

V-Sport: $62,190

  • All base features, plus
  • 3.6-liter twin-turbo V-6 engine
  • 19-inch ultra-bright machined-finish alloy wheels
  • Run-flat tires
  • Performance suspension
  • Magnetic ride control
  • Electronic limited-slip differential
  • Heavy-duty cooling system
  • HID headlights
  • Heated and ventilated front seats
  • Split-folding rear seats
  • 360-degree camera
  • Automatic park assist
  • Forward-collision alert
  • Following-distance indicator
  • Lane-keep assist
  • Lane-departure warning
  • Lane-change alert
  • Blind-spot warning
  • Rear cross-traffic alert
  • Safety-alert rear seat
  • Rain-sensing wipers
  • Adaptive headlights
  • Automatic parking assist
  • Auto-dimming side-view mirrors
  • Leather seats
  • Automatic heated steering wheel
  • Bose 13-speaker sound system

V-Sport Premium Luxury: $72,290

  • All V-Sport features, plus
  • Rear camera mirror
  • Panoramic sunroof
  • Forward and reverse automatic braking
  • Adaptive cruise control
  • Automatic seat belt tightening
  • Illuminated door handles
  • Tri-zone climate control
  • Head-up display
  • Heated rear outboard seating positions
  • Power rear-window sunshade
  • Manual rear side windows sunshades
  • Illuminated door handles
  • Illuminated front door sill plates
  • 110-volt power outlet
  • 20-way performance driver and front passenger seats
  • Aluminum sport pedals  
  • 12.3-inch diagonal color reconfigurable gauge cluster

2019 Buick Regal GS Key Features and Pricing by Trim

GS: $39,995

  • 3.6-liter V-6 engine
  • Nine-speed automatic transmission
  • Twin-clutch all-wheel drive
  • Brembo performance front brakes
  • Electronic parking brake
  • Automatic engine stop/start
  • Push-button start
  • Sport mode
  • 19-inch Technical Gray-accented aluminum wheels
  • Daytime running lights
  • Auto on/off halogen headlights
  • Heated mirrors
  • LED taillights
  • Power seat memory
  • Four-way power passenger seat
  • Eight-way power driver’s seat
  • Active noise cancelation
  • Alloy sport pedals
  • Buick Infotainment System with 8-inch touchscreen
  • 4G LTE Wi-Fi hotspot
  • Two USB ports in rear of center console
  • Front massage seats
  • Dual-zone automatic climate control
  • Flat-bottom leather-wrapped steering wheel with heat
  • 40/20/40 split-folding rear seats
  • Front and rear park assist
  • Heated and ventilated front seats
  • Air ionizer
  • Humidity sensor
  • Keyless entry and ignition
  • Lane-change assist with blind-zone alert
  • Rear cross-traffic alert
  • Rearview camera
  • Teen Driver
  • Ambient interior lighting
  • Leather seats
  • High-performance front seats

Who Should Buy the 2019 Cadillac CTS?

Buyers who want powertrain options will have plenty from the 2019 CTS. There are three engine options — 2.0-liter, 3.6-liter V-6, and 3.6-liter twin-turbo V-6 — and either rear-wheel or all-wheel drive. And for those looking for more performance and who have deeper pockets, the CTS V-Sport’s 420-horsepower V-6 has plenty to offer.

Who Should Buy the 2019 Buick Regal GS?

The Regal GS offers buyers great performance without sacrificing roominess and usefulness. It’s potent V-6 engine delivers a sub-6-second 0-to-60 sprint time while the cabin offers tons of rear passenger space and a huge cargo area. And all this comes at a fraction of the CTS’ base price.

Ready to combine performance and usefulness? Stop by our Buick dealership serving Port St. Lucie, Florida and test drive the 2019 Buick Regal GS today. If you can’t make it to the showrooms, you can check out our online inventory too.