2026 Audi A3 vs 2026 Cadillac CT5

$40,100 · Sedan

$48,600 · Sedan

Comparison Overview

Choosing between the compact precision of the 2026 Audi A3 and the larger presence of the 2026 Cadillac CT5 often boils down to budget versus space. The A3 starts impressively lower at an MSRP of $40,100, significantly undercutting the CT5's $48,600 tag by $8,500. While the CT5 boasts higher output with 237 hp versus the A3's 201 hp, the smaller Audi is more efficient, netting 28 combined MPG compared to the Cadillac's 26 MPG, and crucially, it only requires regular unleaded fuel. Furthermore, the A3 is noticeably smaller at 177.3 inches long, which helps in tight city parking. Conversely, the CT5 offers substantial benefits in utility, providing a superior 11.9 cu ft of cargo capacity against the A3's 8.3 cu ft, making the trade-off between efficiency and sheer size a key decision point for buyers.

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 better 28 combined MPG rating and lower MSRP.

👨‍👩‍👧‍👦 Best for Families

2026 Cadillac CT5

The Cadillac CT5 is the choice for families because it offers significantly more storage with 11.9 cu ft of cargo space compared to the A3's 8.3 cu ft.

🏎️ Best for Enthusiasts

2026 Cadillac CT5

Enthusiasts will favor the Cadillac CT5 for its higher output, delivering 237 hp and 258 lb-ft of torque.

💰 Best Value

2026 Audi A3

The Audi A3 provides better value by starting $8,500 cheaper and accepting regular unleaded fuel instead of premium.

Choose the Audi A3 if...

You need the absolute lowest entry price, as the A3's MSRP is $40,100, saving you $8,500.
You prioritize fuel economy and lower running costs, as the A3 achieves 34 MPG highway.
You need a more nimble, compact vehicle with an overall length of just 177.3 inches.

Choose the Cadillac CT5 if...

You require more practicality, as the CT5 offers 11.9 cu ft of cargo space versus 8.3 cu ft.
You seek brisk acceleration with 237 hp and a sophisticated 10-speed automatic transmission.
You prefer a rear-wheel-drive platform for its dynamics, contrasting with the A3's all-wheel drive.

Key Dimensions

Dimension	Audi A3	Cadillac CT5
Length	177.3"	193.8"
Width	71.5"	74.1"
Height	56.2"	57.2"
Wheelbase	103.7"	116.0"

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	—	✓
Driver Attention Alert	—	✓
Rear Ventilated Disc Brakes	—	✓
Brake Preparation System	—	✓
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	10-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	23/32 MPG
EPA Fuel Economy (Combined)	28 MPG	26 MPG
EPA Driving Range (City/Highway)	348.0/493.0 mi.	391.0/544.0 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	✓	✓
Power Tilt and Telescopic Steering Wheel	—	✓
Cruise Control on Steering Wheel	—	✓
Front View Camera	—	✓
Side View Camera	—	✓
Automatic Parking Assist	—	✓
Wireless Charging Pad	—	✓
Adaptive Cruise Control	—	✓
Universal Remote Transmitter	—	✓
Front Seatback Storage	—	✓
Heated Steering Wheel	—	✓
Dual Zone Climate Control	—	✓
Sun Sensor	—	✓
Auto-Dimming Rearview Mirror	—	✓

In Car Entertainment

Feature	Audi	Cadillac
Infotainment Display	10.1 in	33.0 in
AM/FM Stereo	✓	✓
Speaker System	6	15
Android Auto (Wireless)	✓	✓
Apple CarPlay (Wireless)	✓	✓
USB Port	✓	✓
USB Port with External Media Control	✓	✓
Premium Speaker Brand	—	AKG
Subwoofer Count	—	1
Surround Audio	—	Discrete
Satellite Radio	—	✓

Power Feature

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

Frontseats

Feature	Audi	Cadillac
Front Head Room	36.8 in.	39.0 in.
Front Leg Room	41.2 in.	42.4 in.
Front Shoulder Room	54.8 in.	56.7 in.
Seat Material: Leather	✓	✓
Front Seat Type: Bucket	✓	✓
Driver Seat Power Adjustments	8-way	12-way
Driver Seat Height Adjustment	✓	✓
Driver Seat Lumbar Support	Power	Power
Passenger Seat Power Adjustments	8-way	12-way
Passenger Seat Height Adjustment	✓	✓
Passenger Seat Lumbar Support	Power	Power
Driver Seat Heating	Multi-level	—
Passenger Seat Heating	Multi-level	—
Front Hip Room	—	53.7 in.
Driver Seat Memory Settings	—	2
Driver Seat Ventilation	—	✓
Passenger Seat Ventilation	—	✓
Seat Massage Function	—	✓

Rearseats

Feature	Audi	Cadillac
Rear Head Room	36.6 in.	36.6 in.
Rear Leg Room	35.2 in.	37.9 in.
Rear Shoulder Room	53.0 in.	55.7 in.
Split-Folding Rear Seatback	✓	✓
Folding Rear Seat Feature	✓	✓
Pass-Thru Center Armrest	✓	✓
Rear Hip Room	—	53.7 in.

Tires and Wheels

Feature	Audi	Cadillac
Wheel Material	Alloy	—
Wheel Diameter	17 in	18 in
Tire Type	All Season	✓
Tire Size	225/45R17	245/45R18
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 CT5.

Which car is cheaper to fill up regularly?

The 2026 Audi A3 is the cheaper option for routine fueling because it only requires regular unleaded fuel. The Cadillac CT5 recommends premium unleaded, which typically costs more per gallon.

Is the size difference between the sedans significant for city driving?

Yes, the dimensions differ noticeably; the Audi A3 is 177.3 inches long, making it significantly shorter than the 193.8-inch Cadillac CT5, which aids in easier parking and maneuvering in tight urban spots.

How much more power does the Cadillac CT5 actually offer?

The Cadillac CT5 has a notable power advantage, producing 237 hp and 258 lb-ft of torque, which is 36 hp and 22 lb-ft more than the Audi A3's 201 hp and 236 lb-ft.

How does the cargo space compare for road trips?

The Cadillac CT5 is far superior for cargo, offering 11.9 cu ft, giving you 3.6 extra cubic feet compared to the Audi A3's limited 8.3 cu ft, which matters for luggage.

Does the difference in drive type matter for these cars?

It matters for feel: the A3 uses an all-wheel drive system, which excels in slick conditions, while the CT5 uses a traditional rear-wheel-drive setup preferred by some enthusiasts for balanced handling.

Which car has better fuel economy numbers?

The Audi A3 technically wins on efficiency, achieving 28 combined MPG (24 city/34 highway) compared to the CT5's 26 combined MPG (23 city/32 highway).