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Pontiac Bonneville Trunk Space

The 2005 Pontiac Bonneville has 18 cu ft of trunk space: room for 3 checked suitcases or 9 carry-ons.

EPA interior volume · 18 cu ft trunk · 110 cu ft cabin · measured 2005 · Updated Nov 3, 2026
Quick answer

Among 118 sedans and coupes with a similar-sized cabin, the average is 15.6 cu ft, so the Bonneville sits above it.

What actually fits in a Bonneville

The biggest single change came in 1993: +3 cu ft against the 1992 car.

FIG.01·Pontiac Bonneville — what fits in the trunk
What you are loadingHow many fitEach item
Checked suitcases327 × 21 × 14″ — 4.6 cu ft
Carry-on cases922 × 14 × 9″ — 1.6 cu ft
Grocery bags14about 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·Pontiac Bonneville — cabin versus cargo
SpaceVolumeShare of total
Passenger cabin110 cu ft85.9%
Cargo area18 cu ft14.1%
Total interior128 cu ft100%
ROWS 3·SOURCE EPA interior volume

Against cars with a similar cabin

FIG.03·Pontiac Bonneville against similar cars
MeasureThis car118 sedans and coupes with a similar cabinDifference
Cargo volume18 cu ft15.6 cu ft+2.4 cu ft
In checked suitcases32+1
ROWS 2·SOURCE ForCar, computed across cars of similar cabin size

Cars with the same room

Against its closest rivals: the Cadillac Deville has 19 cu ft, the Buick LeSabre 18 cu ft and the Chrysler 300C 24 cu ft, next to 18 cu ft for the Bonneville.

FIG.04·Pontiac Bonneville — cars with the same cargo room
CarTrunk volumevs Pontiac BonnevilleChecked suitcasesMeasured
BMW 745i18 cu ft0 cu ft32005
BMW 745Li18 cu ft0 cu ft32005
Dodge Intrepid18 cu ft0 cu ft32004
Buick LeSabre18 cu ft0 cu ft32005
Buick Century17 cu ft-1 cu ft22005
Chrysler Concorde19 cu ft+1 cu ft32004
ROWS 6·SOURCE EPA interior volume + ForCar
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Everything on the Pontiac Bonneville
Recalls21 campaignsFuel economy21 mpg bestReliability3.5/5Common problems1,633 complaintsCheck a VINAgainst this exact buildDimensionsSize, weight, generationsUsed prices57 listingsWindow stickerOriginal Monroney labelDecode a VINWhat each character meansAbout this car1984–2005

Frequently asked questions

How much cargo space does the Pontiac Bonneville have?

18 cu ft in the trunk in the 2005 model, with 110 cu ft of passenger space. The average for 118 sedans and coupes with a similar cabin is 15.6 cu ft.

Does the Bonneville have more cargo space than the Cadillac Deville?

No: 18 cu ft against 19 cu ft for the 2005 Cadillac Deville, about 1 cu ft less.

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

Not much overall: 17 cu ft in 1984 and 18 cu ft in 2005, though it ranged from 15 to 18 cu ft in between.

Which cars have the same cargo room as the Bonneville?

The closest by volume in the same body family are the BMW 745i (18 cu ft), BMW 745Li (18 cu ft) and Dodge Intrepid (18 cu ft), against 18 cu ft for the Bonneville.

Cargo and passenger volumes from EPA interior-volume records, measured 2005 for the Pontiac Bonneville, 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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