2025 BMW 3 Series vs 2026 Cadillac CT5

$45,950 · Sedan

$48,600 · Sedan

Comparison Overview

The stage is set for a fierce battle of German precision versus American athleticism! The 2025 BMW 3 Series electrifies with its standard 255 hp and a superior combined 31 MPG, making its 8-speed automatic transmission a beacon of efficiency and spirited rear-wheel-drive dynamics. Conversely, the 2026 Cadillac CT5 brings a wider stance at 74.1 inches and emphasizes raw capability, pairing its 237 hp with a sophisticated 10-speed automatic. While the BMW pulls ahead in efficiency by a striking 5 MPG combined, the CT5 offers a longer profile at 193.8 inches, suggesting more presence on the road, though it sacrifices cargo space, offering only 11.9 cu ft compared to the BMW's 16.9 cu ft. For those prioritizing the ultimate balance of performance and economy, the 3 Series holds an edge; however, the CT5 appeals to those who value slightly more dramatic proportions and robust torque delivery (295 lb-ft in the BMW vs. 258 lb-ft in the Caddy).

Size Comparison

Performance

Fuel Efficiency

Full Specifications

Our Verdicts

🚗 Best for Commuters

2025 BMW 3 Series

The BMW 3 Series wins for commuters due to its significantly better fuel economy, achieving 31 combined MPG versus the CT5's 26 combined MPG.

👨‍👩‍👧‍👦 Best for Families

2025 BMW 3 Series

The 3 Series offers substantially more utility for families, boasting 16.9 cu ft of cargo capacity compared to the CT5's 11.9 cu ft.

🏎️ Best for Enthusiasts

2025 BMW 3 Series

Enthusiasts will likely favor the BMW's higher output, delivering 255 hp and 295 lb-ft of torque against the CT5's 237 hp and 258 lb-ft.

💰 Best Value

2025 BMW 3 Series

The BMW 3 Series presents a stronger initial value proposition with an MSRP of $45,950, undercutting the Cadillac CT5's $48,600 starting price.

Choose the BMW 3 Series if...

You prioritize outstanding fuel efficiency, benefiting from 35 MPG highway vs. the CT5's 32 MPG highway.
You need maximum cargo room, as the 3 Series provides 16.9 cu ft versus the CT5's 11.9 cu ft.
You want the most power available, as the 3 Series leads with 255 horsepower and 295 lb-ft of torque.

Choose the Cadillac CT5 if...

You prefer the feel of a 10-speed automatic transmission, which offers two more gears than the 3 Series' 8-speed unit.
You desire a larger, more imposing physical presence, given the CT5 is 193.8 inches long and 74.1 inches wide.
You appreciate using premium unleaded fuel as recommended rather than strictly required for operation.

Key Dimensions

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

Features Comparison

Safety

Feature	BMW	Cadillac
Driver Attention Alert	✓	✓
Pre-Collision Safety System	✓	✓
Post-Collision Safety System	✓	✓
Dual Front 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
Brake Drying	✓	—
Front Ventilated Disc Brakes	✓	✓
Rear Ventilated Disc Brakes	✓	✓
Brake Preparation System	✓	✓
Brake Assist	✓	✓
Tire Pressure Monitoring System	✓	✓
Automatic Headlights	✓	✓
Headlight Delay-Off	✓	✓
LED Headlights	✓	✓
Self-Leveling 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	✓	✓
Blind Spot Monitor	—	✓
Lane Departure Warning	—	✓
Lane Keeping Assist System	—	✓
Rear Cross Traffic Alert	—	✓
Dual Rear Side-Mounted Airbags	—	✓

Engine

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

Fuel

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

Comfort & Convenience

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

In Car Entertainment

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

Power Feature

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

Frontseats

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

Rearseats

Feature	BMW	Cadillac
Rear Head Room	37.6 in.	36.6 in.
Rear Leg Room	35.2 in.	37.9 in.
Rear Shoulder Room	54.6 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	BMW	Cadillac
Wheel Material	Alloy	—
Wheel Size	18 x 7.5 in	—
Tire Size	225/45R18	245/45R18
Run Flat Tires	✓	—
Wheel Finish	—	Painted Alloy
Wheel Diameter	—	18 in
Tire Type	—	✓

Suspension

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

Warranty

Feature	BMW	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./ 36000 mi.	1 yr./ unlimited mi.

Frequently Asked Questions

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

What is the primary efficiency difference between the 2025 BMW 3 Series and the 2026 Cadillac CT5?

The BMW 3 Series holds a clear advantage in fuel economy, achieving a combined 31 MPG. In contrast, the Cadillac CT5 is rated for only 26 combined MPG, resulting in a 5 MPG difference favoring the BMW for daily driving.

Which sedan offers better performance metrics based on these specifications?

The BMW 3 Series offers superior outright performance numbers, boasting 255 horsepower and 295 lb-ft of torque from its engine setup. The Cadillac CT5 is slightly behind with 237 horsepower and 258 lb-ft of torque.

How significant is the difference in physical size between these two RWD sedans?

The Cadillac CT5 is noticeably larger externally, measuring 193.8 inches in length compared to the 3 Series' 185.9 inches, and is also wider at 74.1 inches versus 71.9 inches for the BMW.

Is the higher starting price of the 2026 Cadillac CT5 justified by its features over the 3 Series?

The CT5 starts at $48,600, which is $2,650 more than the BMW's $45,950 MSRP; this extra cost buys a larger body and a 10-speed transmission, but sacrifices 5 MPG in combined efficiency.

Which car provides more practical storage space for passengers?

The 2025 BMW 3 Series is the clear winner for luggage, providing 16.9 cubic feet of cargo volume. The 2026 Cadillac CT5 offers significantly less usability with only 11.9 cubic feet for storage.

Does the difference in transmission affect the driving feel?

The CT5 utilizes a 10-speed shiftable automatic, potentially offering smoother acceleration ramps due to more closely spaced gears, whereas the 3 Series uses an 8-speed automatic transmission.