2026 Audi A3 vs 2026 Cadillac CT4

$40,100 · Sedan

$35,600 · Sedan

Comparison Overview

The most significant numerical divergence between the 2026 Cadillac CT4 and the 2026 Audi A3 lies in their starting MSRPs, with the CT4 priced at $35,600, a full $4,500 less than the Audi's $40,100. Performance metrics favor the Cadillac, boasting 237 horsepower and 258 lb-ft of torque compared to the A3's 201 hp and 236 lb-ft. However, the A3 achieves superior fuel economy, returning 28 MPG combined versus the CT4's 26 MPG combined, although the Audi uses regular unleaded while the Cadillac recommends premium. The CT4 also offers a measurable advantage in utility, providing 10.7 cu ft of cargo capacity versus the A3's 8.3 cu ft. Drive configurations differ fundamentally, with the A3 featuring standard all-wheel drive and the CT4 employing a rear-wheel-drive platform, further influencing real-world driving dynamics.

Size Comparison

Performance

Fuel Efficiency

Full Specifications

Our Verdicts

🚗 Best for Commuters

2026 Audi A3

The 2026 Audi A3 wins for commuters due to its slightly better 28 MPG combined rating and standard all-wheel drive offering more consistent traction.

👨‍👩‍👧‍👦 Best for Families

2026 Cadillac CT4

The 2026 Cadillac CT4 provides 10.7 cu ft of cargo space, significantly exceeding the A3's 8.3 cu ft, making it more practical for family hauling.

🏎️ Best for Enthusiasts

2026 Cadillac CT4

The CT4 offers a superior power output with 237 hp and 258 lb-ft of torque, complemented by its traditional rear-wheel-drive architecture.

💰 Best Value

2026 Cadillac CT4

The Cadillac CT4 secures the value verdict by offering $4,500 less in MSRP while delivering 36 more horsepower.

Choose the Audi A3 if...

You prioritize the efficiency of running on regular unleaded fuel instead of premium.
All-wheel drive capability is a non-negotiable requirement for your primary commute.
You prefer a shorter overall exterior length of 177.3 inches for easier urban maneuvering.

Choose the Cadillac CT4 if...

Maximizing power is key, as it produces 237 hp compared to the A3's 201 hp.
You need the maximum available utility, demonstrated by its 10.7 cu ft cargo capacity.
A lower initial investment is desired, with an MSRP that is $4,500 below the A3.

Key Dimensions

Dimension	Audi A3	Cadillac CT4
Length	177.3"	187.2"
Width	71.5"	71.4"
Height	56.2"	56.0"
Wheelbase	103.7"	109.0"

Features Comparison

Safety

Feature	Audi	Cadillac
Blind Spot Monitor	✓	✓
Lane Departure Warning	✓	✓
Rear Cross Traffic Alert	✓	✓
Pre-Collision Safety System	✓	✓
Post-Collision Safety System	✓	✓
Dual Front Side-Mounted Airbags	✓	✓
Dual Rear Side-Mounted Airbags	✓	✓
Front Head Airbags	✓	✓
Rear Head Airbags	✓	✓
Passenger Airbag Occupant Sensing Deactivation	✓	✓
Electronic Stability Control	✓	✓
Traction Control System	✓	✓
LATCH System	✓	✓
Rear Door Child Safety Locks	✓	✓
Anti-lock Brakes (ABS)	4-Wheel	4-Wheel
Front Ventilated Disc Brakes	✓	✓
Rear Solid Disc Brakes	✓	—
Brake Assist	✓	✓
Tire Pressure Monitoring System	✓	✓
Automatic Headlights	✓	✓
LED Headlights	✓	✓
Daytime Running Lights	✓	✓
Integrated Turn Signal Mirrors	✓	✓
Front Headrests	2	2
Front Height Adjustable Headrests	✓	✓
Rear Headrests	3	2
Rear Height Adjustable Headrests	✓	✓
Rear Center 3-Point Seatbelt	✓	✓
Anti-Theft Alarm System (Remote)	✓	✓
Engine Immobilizer	✓	✓
Lane Keeping Assist System	—	✓
Rear Ventilated Disc Brakes	—	✓
Headlight Delay-Off	—	✓

Engine

Feature	Audi	Cadillac
Base Engine Displacement	2.0 L	2.0 L
Number of Cylinders	inline 4	inline 4
Base Engine Type	mild hybrid	gas
Horsepower	201 hp	237 hp @ 5000 rpm
Torque	236 lb-ft	258 lb-ft @ 1500 rpm
Number of Valves	16	16
Camshaft Type	Double overhead cam (DOHC)	Double overhead cam (DOHC)
Variable Valve Timing	Variable	Variable
Fuel Injection Type	✓	✓
Cylinder Deactivation	—	✓

Drive Train

Feature	Audi	Cadillac
Transmission Type	7-speed automated manual	8-speed shiftable automatic
Drivetrain Type	all wheel drive	rear wheel drive
Center Differential Type	Limited Slip	—
Hill Descent Control	✓	—

Fuel

Feature	Audi	Cadillac
Fuel Type	regular unleaded	premium unleaded (recommended)
EPA Fuel Economy (City/Highway)	24/34 MPG	22/32 MPG
EPA Fuel Economy (Combined)	28 MPG	26 MPG
EPA Driving Range (City/Highway)	348.0/493.0 mi.	374.0/544.0 mi.
Fuel Tank Capacity	14.5 gal.	17.0 gal.

Comfort & Convenience

Feature	Audi	Cadillac
Push Button Start	✓	✓
Tilt and Telescopic Steering Wheel	✓	✓
Transmission Controls on Steering Wheel	✓	✓
Audio Controls on Steering Wheel	✓	✓
Electric Power Steering	✓	✓
Rear View Camera	✓	✓
Front Parking Sensors	✓	—
Rear Parking Sensors	✓	✓
Driver Assisted Parking Assist	✓	—
Cruise Control	✓	✓
Front Cupholders	✓	✓
Rear Cupholders	✓	✓
Front Door Pockets	✓	✓
Rear Door Pockets	✓	✓
Leather Steering Wheel	✓	✓
Three Zone Climate Control	✓	—
Rear Ventilation Ducts	✓	✓
Interior Air Filtration	✓	✓
Dual Vanity Mirrors	✓	✓
Turn Signal Indicators in Mirrors	✓	✓
Cruise Control on Steering Wheel	—	✓
Wireless Charging Pad	—	✓
Front Seatback Storage	—	✓
Heated Steering Wheel	—	✓
Dual Zone Climate Control	—	✓
Sun Sensor	—	✓

In Car Entertainment

Feature	Audi	Cadillac
Infotainment Display	10.1 in	8.0 in
AM/FM Stereo	✓	✓
Speaker System	6	8
Android Auto (Wireless)	✓	✓
Apple CarPlay (Wireless)	✓	✓
USB Port	✓	✓
USB Port with External Media Control	✓	✓
Auxiliary Audio Input	—	✓
Memory Card Slot	—	✓
Satellite Radio	—	✓
Satellite Radio Trial Period	—	3 months
Speed Sensitive Volume Control	—	✓

Power Feature

Feature	Audi	Cadillac
One-Touch Power Windows	4	4
Moonroof Type	1st Row Power Glass Extended	—
Remote Keyless Entry	✓	—
Heated Mirrors	✓	✓
Keyless Entry	—	✓

Frontseats

Feature	Audi	Cadillac
Front Head Room	36.8 in.	38.3 in.
Front Leg Room	41.2 in.	42.4 in.
Front Shoulder Room	54.8 in.	55.2 in.
Seat Material: Leather	✓	—
Front Seat Type: Bucket	✓	✓
Driver Seat Power Adjustments	8-way	8-way
Driver Seat Height Adjustment	✓	✓
Driver Seat Lumbar Support	Power	Power
Passenger Seat Power Adjustments	8-way	6-way
Passenger Seat Height Adjustment	✓	✓
Passenger Seat Lumbar Support	Power	—
Driver Seat Heating	Multi-level	Multi-level
Passenger Seat Heating	Multi-level	Multi-level
Front Hip Room	—	53.0 in.
Seat Material: Leatherette	—	✓

Rearseats

Feature	Audi	Cadillac
Rear Head Room	36.6 in.	36.5 in.
Rear Leg Room	35.2 in.	33.4 in.
Rear Shoulder Room	53.0 in.	53.9 in.
Split-Folding Rear Seatback	✓	✓
Folding Rear Seat Feature	✓	✓
Pass-Thru Center Armrest	✓	✓
Rear Hip Room	—	52.5 in.

Tires and Wheels

Feature	Audi	Cadillac
Wheel Material	Alloy	—
Wheel Diameter	17 in	17 in
Tire Type	All Season	✓
Tire Size	225/45R17	P225/45R17
Spare Tire Type	Temporary	—
Spare Tire Location	Inside Mounted	—
Wheel Finish	—	Painted Alloy

Suspension

Feature	Audi	Cadillac
Four-Wheel Independent Suspension	✓	✓
Front Stabilizer Bar	✓	✓
Rear Stabilizer Bar	✓	✓

Warranty

Feature	Audi	Cadillac
Basic Warranty	4 yr./ 50000 mi.	4 yr./ 50000 mi.
Drivetrain Warranty	4 yr./ 50000 mi.	6 yr./ 70000 mi.
Corrosion/Rust Warranty	12 yr./ unlimited mi.	4 yr./ 50000 mi.
Roadside Assistance	4 yr./ unlimited mi.	6 yr./ 70000 mi.
Complimentary Scheduled Maintenance	3 yr./ 30000 mi.	1 yr./ unlimited mi.

Frequently Asked Questions

Common questions about comparing the 2026 Audi A3 and 2026 Cadillac CT4.

Which car has better fuel economy based on the standard specs?

The 2026 Audi A3 has a better combined EPA rating at 28 MPG compared to the 2026 Cadillac CT4's 26 MPG. Furthermore, the A3 uses regular unleaded fuel, whereas the CT4 recommends premium, potentially increasing long-term running costs.

What is the practical cargo space difference between the two sedans?

The Cadillac CT4 offers 10.7 cubic feet of trunk space, which is substantially larger than the Audi A3's 8.3 cubic feet. This 2.4 cubic foot difference equates to nearly 30% more space for luggage or groceries in the CT4.

How does the base price difference affect the cost-per-horsepower ratio?

The CT4 is significantly better on a cost-per-horsepower metric. It costs $4,500 less while producing 36 more horsepower, resulting in a lower upfront cost for increased performance capability.

Are these vehicles equipped similarly regarding drivetrain orientation?

No, the standard configurations are fundamentally different; the Audi A3 comes with all-wheel drive (AWD) and a 7-speed automated manual, while the Cadillac CT4 is rear-wheel drive (RWD) paired with an 8-speed automatic transmission.

Which vehicle offers greater passenger or storage capacity overall?

Based strictly on provided dimensional data, the CT4 is longer (187.2 inches vs. 177.3 inches) and has more cargo volume (10.7 cu ft vs. 8.3 cu ft), suggesting greater overall physical capacity.

Does the A3's smaller size translate to any measurable advantage?

Yes, the Audi A3 is slightly narrower (71.5 inches vs. 71.4 inches, though negligible) and significantly shorter in length and height. This smaller footprint might offer minor advantages in tight parking situations compared to the longer CT4.