Compare the2022 BMW 3 Series SedanVS 2021 Cadillac CT4 V-Series

The 3 Series Sedan’s pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The CT4 V-Series doesn’t offer pre-crash pretensioners.

The 3 Series Sedan has a standard PostCrash iBrake, which automatically applies the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The CT4 V-Series doesn’t offer a post collision braking system: in the event of a collision that triggers the airbags, more collisions are possible without the protection of airbags that may have already deployed.

The 3 Series Sedan’s standard lane departure warning system alerts a temporarily inattentive driver when the vehicle begins to leave its lane and gently nudges the vehicle back towards its lane. A lane departure warning system costs extra on the CT4 V-Series.

The 3 Series Sedan’s driver alert monitor detects an inattentive driver then sounds a warning and suggests a break. According to the NHTSA, drivers who fall asleep cause about 100,000 crashes and 1500 deaths a year. The CT4 V-Series doesn’t offer a driver alert monitor.

Both the 3 Series Sedan and the CT4 V-Series have standard driver and passenger frontal airbags, front side-impact airbags, driver and front passenger knee airbags, side-impact head airbags, front seatbelt pretensioners, plastic fuel tanks, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, rearview cameras, available all wheel drive, blind spot warning systems, rear parking sensors and rear cross-path warning.

For its top level performance in IIHS driver and passenger-side small overlap frontal, moderate overlap frontal, side impact, roof strength and head restraint tests, its standard vehicle-to-vehicle front crash prevention system, its standard vehicle-to-pedestrian front crash prevention system, and its available headlight’s “Good” rating, the Insurance Institute for Highway Safety grants the 3 Series Sedan the rating of “Top Pick” for 2021, a rating granted to only 121 vehicles tested by the IIHS. The CT4 V-Series has not been tested, yet.

The 3 Series Sedan’s corrosion warranty is 6 years longer than the CT4 V-Series’ (12 vs. 6 years).

BMW pays for scheduled maintenance on the 3 Series Sedan for 3 years and 36,000 miles. BMW will pay for oil changes, lubrication and any other required maintenance. Cadillac only pays for the first scheduled maintenance visit on the CT4 V-Series.

A reliable vehicle saves its owner time, money and trouble. Nobody wants to be stranded or have to be without a vehicle while it’s being repaired. Consumer Reports rates the 3 Series Sedan’s reliability 42 points higher than the CT4 V-Series.

From surveys of all its subscribers, Consumer Reports’ January 2021 Auto Issue reports that BMW vehicles are more reliable than Cadillac vehicles. Consumer Reports ranks BMW 9 places higher in reliability than Cadillac.

The M340i’s standard 3.0 turbo 6-cylinder hybrid produces 57 more horsepower (382 vs. 325) than the CT4 V-Series’ 2.7 turbo 4-cylinder.

As tested in Motor Trend the BMW 3 Series Sedan is faster than the Cadillac CT4 V-Series:

In a Car and Driver race course test, the BMW M340i was clocked 3 seconds faster than the Cadillac CT4 V-Series AWD (183.2 sec. vs. 186.2 sec.).

On the EPA test cycle the 3 Series Sedan gets better mileage than the CT4 V-Series:

Regenerative brakes improve the 3 Series Sedan’s fuel efficiency by converting inertia back into energy instead of wasting it. The CT4 V-Series doesn’t offer a regenerative braking system.

For better stopping power the 3 Series Sedan’s brake rotors are larger than those on the CT4 V-Series:

The 3 Series Sedan stops shorter than the CT4 V-Series:

The 3 Series Sedan’s optional 255/30R20 rear tires provide better handling because they have a lower 30 series profile (height to width ratio) that provides a stiffer sidewall than the CT4 V-Series’ optional 35 series tires.

For better ride, handling and brake cooling the 3 Series Sedan offers optional 20-inch wheels. The CT4 V-Series’ largest wheels are only 19-inches.

For a smoother ride and more stable handling, the 3 Series Sedan’s wheelbase is 2.9 inches longer than on the CT4 V-Series (112.2 inches vs. 109.3 inches).

For better handling and stability, the average track (width between the wheels) on the 3 Series Sedan is 2 inches wider in the front and 1.3 inches wider in the rear than the track on the CT4 V-Series.

The 330i handles at .95 G’s, while the CT4 V-Series AWD pulls only .87 G’s of cornering force in a Motor Trend skidpad test.

The M340i executes Motor Trend’s “Figure Eight” maneuver quicker than the CT4 V-Series (25 seconds @ .77 average G’s vs. 25.4 seconds @ .73 average G’s).

The front grille of the 3 Series Sedan uses electronically controlled shutters to close off airflow and reduce drag when less engine cooling is needed. This helps improve highway fuel economy. The CT4 V-Series doesn’t offer active grille shutters.

As tested by Car and Driver, the interior of the 330i is quieter than the CT4 V-Series:

The 3 Series Sedan has .4 inches more front headroom, .8 inches more front shoulder room, 1.1 inches more rear headroom, 1.8 inches more rear legroom and .7 inches more rear shoulder room than the CT4 V-Series.

The 3 Series Sedan has a much larger trunk than the CT4 V-Series (13 vs. 10.7 cubic feet).

A low lift-over trunk design makes loading and unloading the 3 Series Sedan easier. The 3 Series Sedan’s trunk lift-over height is 26.7 inches, while the CT4 V-Series’ liftover is 30 inches.

Pulling a handle automatically lowers the 3 Series Sedan’s rear seats, to make changing between passengers and cargo easier. The CT4 V-Series doesn’t offer automatic folding seats.

With its sedan body style, valet key, locking rear seatbacks and remote trunk release lockout, the 3 Series offers cargo security. The CT4 V-Series’ non-lockable folding seat defeats cargo security.

To make loading and unloading groceries and cargo easier, especially for short adults, the 3 Series Sedan offers an optional power trunk, which opens and closes automatically by pressing a button, or optionally by just kicking your foot under the back bumper, completely leaving your hands free. The CT4 V-Series doesn’t offer a power trunk.

The 3 Series Sedan’s front and rear power windows all open or close with one touch of the switches, making it more convenient at drive-up windows and toll booths, or when talking with someone outside of the car. The CT4 V-Series’ rear power window switches have to be held the entire time to close them fully.

If the windows are left open on the 3 Series Sedan the driver can close them all at the outside door handle. On a hot day the driver can lower the windows from a distance using the keyless remote. The driver of the CT4 V-Series can only close the windows from inside the vehicle, with the ignition on.

The 3 Series Sedan has a standard locking fuel door with a remote release located convenient to the driver. A locking fuel door helps prevent fuel theft and vandalism, such as sugar in the tank. The CT4 V-Series doesn’t offer a locking fuel door.

The CT4 V-Series’ optional cornering lamps activate a lamp on the front corner when the turn signal is activated. The 3 Series Sedan’s optional adaptive cornering lights turn the actual headlight unit up to several degrees, depending on steering wheel angle and vehicle speed. This lights a significant distance into corners at any speed.

Both the 3 Series Sedan and the CT4 V-Series offer optional heated front seats. The 3 Series Sedan also offers optional heated rear seats to keep those passengers extremely comfortable in the winter. Heated rear seats aren’t available in the CT4 V-Series.

The 3 Series Sedan’s available Parking Assistant Plus can parallel park or back into a parking spot by itself, starting, stopping and changing direction automatically. The CT4 V-Series’ automatic parking system requires operating the brakes and transmission to safely park.

Consumer Reports® recommends the BMW 3 Series Sedan, based on reliability, safety and performance.