Pontiac G8 Trunk Space — 17 cu ft and What Fits

Quick answer

Among 171 sedans and coupes with a similar-sized cabin, the average is 15.1 cu ft, so the G8 sits above it.

What actually fits in a G8

FIG.01·Pontiac G8 — what fits in the trunk
What you are loading	How many fit	Each item
Checked suitcases	2	27 × 21 × 14″ — 4.6 cu ft
Carry-on cases	8	22 × 14 × 9″ — 1.6 cu ft
Grocery bags	13	about 1 cu ft each
Golf bags	2	full set, about 5 cu ft
Folded stroller	Fits	about 6 cu ft

ROWS 5·SOURCE ForCar, computed from EPA cargo volume

Cabin or cargo — where the space went

FIG.02·Pontiac G8 — cabin versus cargo
Space	Volume	Share of total
Passenger cabin	107 cu ft	86.3%
Cargo area	17 cu ft	13.7%
Total interior	124 cu ft	100%

ROWS 3·SOURCE EPA interior volume

Against cars with a similar cabin

FIG.03·Pontiac G8 against similar cars
Measure	This car	171 sedans and coupes with a similar cabin	Difference
Cargo volume	17 cu ft	15.1 cu ft	+1.9 cu ft
In checked suitcases	2	2	+0

ROWS 2·SOURCE ForCar, computed across cars of similar cabin size

Cars with the same room

Against its closest rivals: the Lincoln Town Car has 21 cu ft, the Chrysler 300C 24 cu ft and the Cadillac DTS 19 cu ft, next to 17 cu ft for the G8. That makes the G8 the tightest of the four.

FIG.04·Pontiac G8 — cars with the same cargo room
Car	Trunk volume	vs Pontiac G8	Checked suitcases	Measured
Buick Century	17 cu ft	0 cu ft	2	2005
Buick Lucerne	17 cu ft	0 cu ft	2	2011
BMW 745i	18 cu ft	+1 cu ft	3	2005
BMW 745Li	18 cu ft	+1 cu ft	3	2005
Saab 9-5	18 cu ft	+1 cu ft	3	2012
Kia Amanti	16 cu ft	-1 cu ft	2	2009

ROWS 6·SOURCE EPA interior volume + ForCar

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Everything on the Pontiac G8

Recalls8 campaigns Fuel economy20 mpg best Reliability4.0/5 Common problems215 complaints Check a VINAgainst this exact build Window stickerOriginal Monroney label Decode a VINWhat each character means About this car2008–2009

Frequently asked questions

How much cargo space does the Pontiac G8 have?

17 cu ft in the trunk in the 2009 model, with 107 cu ft of passenger space. The average for 171 sedans and coupes with a similar cabin is 15.1 cu ft.

Does the G8 have more cargo space than the Lincoln Town Car?

No: 17 cu ft against 21 cu ft for the 2011 Lincoln Town Car, about 4 cu ft less.

Which cars have the same cargo room as the G8?

The closest by volume in the same body family are the Buick Century (17 cu ft), Buick Lucerne (17 cu ft) and BMW 745i (18 cu ft), against 17 cu ft for the G8.

Cargo and passenger volumes from EPA interior-volume records, measured 2009 for the Pontiac G8, 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 Denis Kataev, founder of ForCar.

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