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BMW M340i Trunk Space

The 2026 BMW M340i has 13 cu ft of trunk space: room for 2 checked suitcases or 6 carry-ons.

EPA interior volume · 13 cu ft trunk · 94 cu ft cabin · measured 2026 · Updated Nov 4, 2026
Quick answer

Among 233 sedans and coupes with a similar-sized cabin, the average is 13.5 cu ft, so the M340i sits right on it.

What actually fits in a M340i

It has stayed at about 13 cu ft in every model year we hold, 2020 to 2026.

FIG.01·BMW M340i — what fits in the trunk
What you are loadingHow many fitEach item
Checked suitcases227 × 21 × 14″ — 4.6 cu ft
Carry-on cases622 × 14 × 9″ — 1.6 cu ft
Grocery bags10about 1 cu ft each
Golf bags2full 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·BMW M340i — cabin versus cargo
SpaceVolumeShare of total
Passenger cabin94 cu ft87.9%
Cargo area13 cu ft12.1%
Total interior107 cu ft100%
ROWS 3·SOURCE EPA interior volume

Against cars with a similar cabin

FIG.03·BMW M340i against similar cars
MeasureThis car233 sedans and coupes with a similar cabinDifference
Cargo volume13 cu ft13.5 cu ft-0.5 cu ft
In checked suitcases22+0
ROWS 2·SOURCE ForCar, computed across cars of similar cabin size

Cars with the same room

Against its closest rivals: the Cadillac CT4 has 11 cu ft, next to 13 cu ft for the M340i. That makes the M340i the roomiest of the two.

FIG.04·BMW M340i — cars with the same cargo room
CarTrunk volumevs BMW M340iChecked suitcasesMeasured
BMW 330i13 cu ft0 cu ft22026
Mercedes-Benz AMG GT13 cu ft0 cu ft22026
Toyota Corolla13 cu ft0 cu ft22026
Toyota Crown13 cu ft0 cu ft22026
Rolls-Royce Flying Spur13 cu ft0 cu ft22026
Saturn LS13 cu ft0 cu ft22026
ROWS 6·SOURCE EPA interior volume + ForCar
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Everything on the BMW M340i
Recalls18 campaignsFuel economy29 mpg bestReliability4.0/5Common problems71 complaintsCheck a VINAgainst this exact buildUsed prices62 listingsInsurance costEstimated per yearWindow stickerOriginal Monroney labelDecode a VINWhat each character meansAbout this car2020–2026

Frequently asked questions

How much cargo space does the BMW M340i have?

13 cu ft in the trunk in the 2026 model, with 94 cu ft of passenger space. The average for 233 sedans and coupes with a similar cabin is 13.5 cu ft.

Does the M340i have more cargo space than the Cadillac CT4?

Yes: 13 cu ft against 11 cu ft for the 2026 Cadillac CT4, about 2 cu ft more.

Has the M340i's trunk got bigger over the years?

Not much overall: 13 cu ft in 2020 and 13 cu ft in 2026, within 2 cu ft in every year we hold.

Which cars have the same cargo room as the M340i?

The closest by volume in the same body family are the BMW 330i (13 cu ft), Mercedes-Benz AMG GT (13 cu ft) and Toyota Corolla (13 cu ft), against 13 cu ft for the M340i.

Cargo and passenger volumes from EPA interior-volume records, measured 2026 for the BMW M340i, 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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