2026 BMW 3 Series vs 2026 Cadillac CT5

$47,500 · Sedan

$48,600 · Sedan

Comparison Overview

The most significant quantitative divergence between the 2026 BMW 3 Series (Car 1) and the 2026 Cadillac CT5 (Car 2) lies in fuel economy, where the BMW achieves a 31 MPG combined rating versus the CT5's 26 MPG combined, a crucial 5 MPG advantage. Performance metrics show the BMW leading in power output with 255 hp and 295 lb-ft of torque, compared to the Cadillac's 237 hp and 258 lb-ft, despite both using premium unleaded fuel. Priced slightly lower at $47,500 versus $48,600, the 3 Series also offers superior practicality with 16.9 cu ft of cargo space, dwarfing the CT5's 11.9 cu ft. While the Cadillac is substantially longer at 193.8 inches compared to the BMW's 185.9 inches, the efficiency and power edge position the 3 Series strongly in the efficiency and performance metrics, though the CT5 utilizes a 10-speed automatic transmission versus the BMW's 8-speed unit.

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 rating of 31 MPG.

👨‍👩‍👧‍👦 Best for Families

2026 BMW 3 Series

The BMW 3 Series provides significantly more usable space with 16.9 cu ft of cargo capacity compared to the Cadillac CT5's 11.9 cu ft.

🏎️ Best for Enthusiasts

2026 BMW 3 Series

The 2026 BMW 3 Series is the clear choice for performance enthusiasts, boasting higher output figures of 255 hp and 295 lb-ft of torque.

💰 Best Value

2026 BMW 3 Series

The BMW 3 Series offers better value by delivering higher horsepower and 5 MPG better fuel efficiency for a $1,100 lower MSRP.

Choose the BMW 3 Series if...

Fuel efficiency is paramount, given its 31 MPG combined rating versus the CT5's 26 MPG.
Maximum usable storage space is required, as 16.9 cu ft surpasses the CT5's 11.9 cu ft.
You prioritize outright acceleration figures, as the 3 Series produces 255 hp and 295 lb-ft of torque.

Choose the Cadillac CT5 if...

A larger exterior footprint is desired, evidenced by its 193.8-inch length compared to the BMW's 185.9 inches.
A transmission with more potential shift points is preferred, as the CT5 features a 10-speed automatic.
You prefer a vehicle where premium fuel is recommended rather than strictly required, offering slight operational flexibility.

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
Lane Departure Warning	✓	✓
Lane Keeping Assist System	✓	✓
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	—	✓
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
Keyless Entry	✓	✓
Heated Mirrors	✓	✓

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 Finish	Painted Alloy	Painted Alloy
Wheel Size	18 x 7.5 in	—
Tire Size	225/45R18	245/45R18
Run Flat Tires	✓	—
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 2026 BMW 3 Series and 2026 Cadillac CT5.

What is the primary difference in ownership costs related to fuel for these two sedans?

The 2026 BMW 3 Series is projected to have lower running costs because it achieves 31 MPG combined, a 5 MPG advantage over the 2026 Cadillac CT5's 26 MPG combined rating, although both require premium fuel.

How do the horsepower and torque figures compare between the two RWD sedans?

The BMW 3 Series is notably more powerful, generating 255 horsepower and 295 lb-ft of torque, whereas the Cadillac CT5 produces 237 horsepower and 258 lb-ft of torque.

Is the Cadillac CT5 significantly larger than the BMW 3 Series based on external dimensions?

Yes, the CT5 is substantially larger, measuring 193.8 inches in length and 74.1 inches in width, compared to the 3 Series' 185.9 inches in length and 71.9 inches in width.

Does the difference in MSRP reflect the performance gap between the vehicles?

The BMW 3 Series undercuts the CT5's MSRP by $1,100 while simultaneously delivering 18 more horsepower, suggesting better immediate price-to-performance value.

Which sedan offers superior utility based on cargo specifications?

The BMW 3 Series is the superior choice for utility, offering 16.9 cubic feet of cargo capacity, which is substantially more than the CT5's 11.9 cubic feet.

Are the driving dynamics likely to differ based on transmission type?

The CT5 utilizes a 10-speed automatic transmission, which may provide a wider spread of gearing compared to the BMW's 8-speed shiftable automatic, potentially impacting the feel of acceleration at speed.