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Cadillac CT4 Trunk Space

The 2026 Cadillac CT4 has 11 cu ft of trunk space: room for 1 checked suitcase or 5 carry-ons.

EPA interior volume · 11 cu ft trunk · 90 cu ft cabin · measured 2026 · Updated Nov 3, 2026
Quick answer

Among 185 sedans and coupes with a similar-sized cabin, the average is 12.9 cu ft, so the CT4 sits below it.

What actually fits in a CT4

The trunk shrank from 13 cu ft in 2020 to 11 cu ft in 2026. The biggest single change came in 2022: −2 cu ft against the 2021 car.

FIG.01·Cadillac CT4 — what fits in the trunk
What you are loadingHow many fitEach item
Checked suitcases127 × 21 × 14″ — 4.6 cu ft
Carry-on cases522 × 14 × 9″ — 1.6 cu ft
Grocery bags8about 1 cu ft each
Golf bags1full set, about 5 cu ft
Folded strollerFitsabout 6 cu ft
ROWS 5·SOURCE ForCar, computed from EPA cargo volume

Cabin or cargo — where the space went

FIG.02·Cadillac CT4 — cabin versus cargo
SpaceVolumeShare of total
Passenger cabin90 cu ft89.1%
Cargo area11 cu ft10.9%
Total interior101 cu ft100%
ROWS 3·SOURCE EPA interior volume

Against cars with a similar cabin

FIG.03·Cadillac CT4 against similar cars
MeasureThis car185 sedans and coupes with a similar cabinDifference
Cargo volume11 cu ft12.9 cu ft-1.9 cu ft
In checked suitcases12-1
ROWS 2·SOURCE ForCar, computed across cars of similar cabin size

Cars with the same room

Against its closest rivals: the BMW M3 has 13 cu ft and the BMW M340i 13 cu ft, next to 11 cu ft for the CT4. That makes the CT4 the tightest of the three.

FIG.04·Cadillac CT4 — cars with the same cargo room
CarTrunk volumevs Cadillac CT4Checked suitcasesMeasured
Cadillac CT511 cu ft0 cu ft12026
BMW i511 cu ft0 cu ft12027
Lexus IS11 cu ft0 cu ft12026
BMW M411 cu ft0 cu ft12020
Chevrolet Spark11 cu ft0 cu ft12022
BMW 530e10 cu ft-1 cu ft12023
ROWS 6·SOURCE EPA interior volume + ForCar
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Everything on the Cadillac CT4
Recalls18 campaignsFuel economy27 mpg bestReliability4.0/5Common problems33 complaintsCheck a VINAgainst this exact buildDimensionsSize, weight, generationsUsed prices90 listingsInsurance costEstimated per yearWindow stickerOriginal Monroney labelDecode a VINWhat each character meansAbout this car2020–2026

Frequently asked questions

How much cargo space does the Cadillac CT4 have?

11 cu ft in the trunk in the 2026 model, with 90 cu ft of passenger space. The average for 185 sedans and coupes with a similar cabin is 12.9 cu ft.

Does the CT4 have more cargo space than the BMW M3?

No: 11 cu ft against 13 cu ft for the 2027 BMW M3, about 2 cu ft less.

Has the CT4's trunk got bigger over the years?

No, it shrank: from 13 cu ft in 2020 to 11 cu ft in 2026.

Which cars have the same cargo room as the CT4?

The closest by volume in the same body family are the Cadillac CT5 (11 cu ft), BMW i5 (11 cu ft) and Lexus IS (11 cu ft), against 11 cu ft for the CT4.

Cargo and passenger volumes from EPA interior-volume records, measured 2026 for the Cadillac CT4, seats up. Luggage capacity computed by ForCar at 80% usable volume against airline-standard case sizes (how we count). Last updated Nov 2026. — ForCar Reviewed by , founder of ForCar.
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