2025 Cadillac CT5 vs 2026 BMW 3 Series

$47,595 · Sedan

$47,500 · Sedan

Comparison Overview

The 2025 Cadillac CT5 bursts onto the scene with assertive American luxury, defined by its larger presence at 193.8 inches long and a standard 237 hp engine delivering 258 lb-ft of torque. Conversely, the 2026 BMW 3 Series asserts its legendary agility, packing a punchier 255 hp and significantly more torque at 295 lb-ft, all while being more compact. While the Cadillac requires a higher premium fuel recommendation and offers a slightly thirstier 26 MPG combined, the Bimmer shines with superior efficiency, achieving 31 MPG combined on its required premium fuel. The cargo discrepancy is massive; the CT5 offers a meager 11.9 cu ft compared to the 3 Series' generous 16.9 cu ft. Starting at nearly identical prices ($47,595 vs $47,500), the choice boils down to bold American styling and RWD balance against German efficiency and utility.

Size Comparison

Performance

Fuel Efficiency

Full Specifications

Our Verdicts

🚗 Best for Commuters

2026 BMW 3 Series

The 2026 BMW 3 Series wins for commuters due to its superior combined fuel economy of 31 MPG versus the CT5's 26 MPG.

👨‍👩‍👧‍👦 Best for Families

2026 BMW 3 Series

The 2026 BMW 3 Series is the clear family choice, boasting 5.0 cubic feet more cargo capacity (16.9 cu ft vs 11.9 cu ft).

🏎️ Best for Enthusiasts

2026 BMW 3 Series

The 2026 BMW 3 Series offers superior mechanical engagement with 255 hp and significantly higher torque at 295 lb-ft.

💰 Best Value

2026 BMW 3 Series

Despite a nearly identical MSRP, the BMW provides significantly better fuel economy and usable cargo space for the money.

Choose the Cadillac CT5 if...

You prefer the stretched, assertive exterior proportions of a longer sedan (193.8 inches).
You favor the smoother acceleration characteristic of the Cadillac's 10-speed automatic transmission.
You enjoy the slightly easier maintenance requirement of using recommended premium fuel instead of required premium fuel.

Choose the BMW 3 Series if...

Fuel efficiency is paramount, as the BMW delivers 31 MPG combined versus 26 MPG.
You require substantial trunk space, benefiting from 16.9 cu ft compared to the CT5's 11.9 cu ft.
You seek sharper performance figures, benefiting from 255 hp and 295 lb-ft of torque.

Key Dimensions

Dimension	Cadillac CT5	BMW 3 Series
Length	193.8"	185.9"
Width	74.1"	71.9"
Height	57.2"	56.8"
Wheelbase	116.0"	112.2"

Features Comparison

Safety

Feature	Cadillac	BMW
Blind Spot Monitor	✓	—
Lane Departure Warning	✓	✓
Lane Keeping Assist System	✓	✓
Rear Cross Traffic Alert	✓	—
Driver Attention 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 Ventilated Disc Brakes	✓	✓
Brake Preparation System	✓	✓
Brake Assist	✓	✓
Tire Pressure Monitoring System	✓	✓
Automatic Headlights	✓	✓
Headlight Delay-Off	✓	✓
LED Headlights	✓	✓
Daytime Running Lights	✓	✓
Integrated Turn Signal Mirrors	✓	✓
Front Headrests	2	2
Front Height Adjustable Headrests	✓	✓
Rear Headrests	2	3
Rear Height Adjustable Headrests	✓	✓
Rear Center 3-Point Seatbelt	✓	✓
Anti-Theft Alarm System (Remote)	✓	✓
Engine Immobilizer	✓	✓
Brake Drying	—	✓
Self-Leveling Headlights	—	✓

Engine

Feature	Cadillac	BMW
Base Engine Displacement	2.0 L	2.0 L
Number of Cylinders	inline 4	inline 4
Base Engine Type	gas	mild hybrid
Horsepower	237 hp @ 5000 rpm	255 hp @ 4700 rpm
Torque	258 lb-ft @ 1500 rpm	295 lb-ft @ 1600 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	Cadillac	BMW
Transmission Type	10-speed shiftable automatic	8-speed shiftable automatic
Drivetrain Type	rear wheel drive	rear wheel drive

Fuel

Feature	Cadillac	BMW
Fuel Type	premium unleaded (recommended)	premium unleaded (required)
EPA Fuel Economy (City/Highway)	23/32 MPG	28/35 MPG
EPA Fuel Economy (Combined)	26 MPG	31 MPG
EPA Driving Range (City/Highway)	391.0/544.0 mi.	436.8/546.0 mi.
Fuel Tank Capacity	17.0 gal.	15.6 gal.

Comfort & Convenience

Feature	Cadillac	BMW
Push Button Start	✓	✓
Power Tilt and Telescopic Steering Wheel	✓	—
Transmission Controls on Steering Wheel	✓	✓
Cruise Control on Steering Wheel	✓	✓
Audio Controls on Steering Wheel	✓	✓
Electric Power Steering	✓	✓
Front View Camera	✓	—
Side View Camera	✓	—
Rear View Camera	✓	✓
Front Parking Sensors	✓	—
Rear Parking Sensors	✓	—
Automatic Parking Assist	✓	—
Wireless Charging Pad	✓	—
Adaptive Cruise Control	✓	—
Universal Remote Transmitter	✓	✓
Front Cupholders	✓	✓
Rear Cupholders	✓	✓
Front Door Pockets	✓	✓
Rear Door Pockets	✓	✓
Front Seatback Storage	✓	✓
Leather Steering Wheel	✓	—
Heated Steering Wheel	✓	—
Dual Zone Climate Control	✓	✓
Rear Ventilation Ducts	✓	✓
Interior Air Filtration	✓	✓
Sun Sensor	✓	—
Dual Vanity Mirrors	✓	✓
Auto-Dimming Rearview Mirror	✓	✓
Turn Signal Indicators in Mirrors	✓	✓
Tilt and Telescopic Steering Wheel	—	✓
Cruise Control	—	✓

In Car Entertainment

Feature	Cadillac	BMW
Infotainment Display	33.0 in	14.9 in
AM/FM Stereo	✓	✓
Premium Speaker Brand	AKG	—
Speaker System	15	10
Subwoofer Count	1	2
Surround Audio	Discrete	—
Android Auto (Wireless)	✓	✓
Apple CarPlay (Wireless)	✓	✓
USB Port	✓	✓
USB Port with External Media Control	✓	✓
Satellite Radio	✓	✓
Stereo Power	—	205W
Satellite Radio Trial Period	—	12 months

Power Feature

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

Frontseats

Feature	Cadillac	BMW
Front Head Room	39.0 in.	38.7 in.
Front Leg Room	42.4 in.	42.0 in.
Front Shoulder Room	56.7 in.	56.0 in.
Front Hip Room	53.7 in.	—
Seat Material: Leather	✓	—
Front Seat Type: Bucket	✓	—
Driver Seat Power Adjustments	12-way	10-way
Driver Seat Height Adjustment	✓	✓
Driver Seat Lumbar Support	Power	Power
Driver Seat Memory Settings	2	2
Passenger Seat Power Adjustments	12-way	10-way
Passenger Seat Height Adjustment	✓	✓
Passenger Seat Lumbar Support	Power	Power
Driver Seat Ventilation	✓	—
Passenger Seat Ventilation	✓	—
Seat Massage Function	✓	—
Seat Material: Leatherette	—	✓
Front Seat Type: Sport	—	✓
Driver Seat Manual Adjustments	—	2-way
Driver Seat Thigh Extension	—	✓
Passenger Seat Manual Adjustments	—	2-way
Passenger Seat Thigh Extension	—	✓
Driver Seat Heating	—	Multi-level
Passenger Seat Heating	—	Multi-level

Rearseats

Feature	Cadillac	BMW
Rear Head Room	36.6 in.	37.6 in.
Rear Leg Room	37.9 in.	35.2 in.
Rear Shoulder Room	55.7 in.	54.6 in.
Rear Hip Room	53.7 in.	—
Split-Folding Rear Seatback	✓	✓
Folding Rear Seat Feature	✓	✓
Pass-Thru Center Armrest	✓	✓

Tires and Wheels

Feature	Cadillac	BMW
Wheel Finish	Painted Alloy	Painted Alloy
Wheel Diameter	18 in	—
Tire Size	245/45R18	225/45R18
Tire Type	✓	—
Wheel Size	—	18 x 7.5 in
Run Flat Tires	—	✓

Suspension

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

Warranty

Feature	Cadillac	BMW
Basic Warranty	4 yr./ 50000 mi.	4 yr./ 50000 mi.
Drivetrain Warranty	6 yr./ 70000 mi.	4 yr./ 50000 mi.
Corrosion/Rust Warranty	4 yr./ 50000 mi.	12 yr./ unlimited mi.
Roadside Assistance	6 yr./ 70000 mi.	4 yr./ unlimited mi.
Complimentary Scheduled Maintenance	1 yr./ unlimited mi.	3 yr./ 36000 mi.

Frequently Asked Questions

Common questions about comparing the 2025 Cadillac CT5 and 2026 BMW 3 Series.

How much better is the fuel economy between the 2025 CT5 and the 2026 3 Series?

The 2026 BMW 3 Series is substantially more efficient, achieving 31 MPG combined, whereas the 2025 Cadillac CT5 is rated for only 26 MPG combined. This 5 MPG advantage means fewer stops at the pump for the BMW driver.

Which sedan offers more usable space for luggage?

The 2026 BMW 3 Series dominates in utility, providing 16.9 cubic feet of cargo capacity. The 2025 Cadillac CT5 is quite tight, offering only 11.9 cubic feet, which is a 5 cubic foot deficit.

Is the standard engine in the CT5 competitive with the 3 Series' output?

No, the BMW's base engine shows a clear performance edge with 255 horsepower and 295 lb-ft of torque compared to the Cadillac's 237 hp and 258 lb-ft of torque. The 3 Series generates 37 more lb-ft of rotational force.

Are there significant differences in size between these two RWD sedans?

Yes, the Cadillac CT5 is considerably longer, measuring 193.8 inches in length compared to the BMW 3 Series' 185.9 inches. This difference of almost 8 inches contributes to the CT5's imposing road presence.

Does the difference in transmission affect the driving feel?

The CT5 utilizes a 10-speed automatic, often delivering smoother, quicker ratio changes, while the 3 Series uses an 8-speed automatic, which is typically tuned for more spirited performance feedback.

How close are the starting prices for these two models?

The vehicles are almost identically priced, with the 2026 BMW 3 Series starting at $47,500 and the 2025 Cadillac CT5 starting just slightly higher at $47,595. Any decision will come down to specification and feature preference rather than upfront cost.