Buick LaCrosse vs Pontiac Bonneville Compare price, expert/user reviews, mpg, engines, safety, cargo capacity and other specs at a glance.

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2019 Buick LaCrosse Avenir AWD
Photo of 2018 model year shown

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User Ranking Drivers and owners ranked these cars in 9 categories.

Used Car Pricing Used listing price comparison and analysis.

2019 Buick LaCrosse
Avenir AWD
CarGurus Instant Market Value
4 listings nationwide


2005 Pontiac Bonneville
CarGurus Instant Market Value
5 listings nationwide


Expert Reviews Reviews from CarGurus experts.

2019 Buick LaCrosse
Avenir AWD
Kyree Rollerson Preview:

In 2017, Buick unveiled its third generation LaCrosse, which introduced a new styling direction for the brand. Therefore, the 2019 Buick LaCrosse receives only minimal updates as it en...

2005 Pontiac Bonneville

After 47 years on the market, the Pontiac Bonneville hears the fat lady sing in 2005. Starting life as Pontiac's sporty full-size coupe and convertible in the 1950s and evolving into ...

User Reviews Reviews from CarGurus users who have driven or owned the car.

2019 Buick LaCrosse
Avenir AWD
GuruT2CP7 writes:
Looks/Style Ranked 2019 Chevrolet Impala Premier FWD better.
"Well it’s the body style is just my style I can’t explain it "
Front Seats Ranked 2019 Chevrolet Impala Premier FWD better.
"I know the one that I actually got to try out the seat were so soft. I fell in Love with it."
2005 Pontiac Bonneville
jwdstang2000 2005 Pontiac Bonneville GXPReview:

Gxp — fun car, drives great. expensive to maintain. love beating up on little tuners at the stoplight wh...

Primary Use: Sport/fun (spirited driving, track racing, off-roading, etc.)

donhank 2005 Pontiac Bonneville GXPReview:

Another Great Orphan Bites The Dust. — Pontiac has been a favorite of mine since owning my Firebird TransAms. This car has great handling, ...

Primary Use: Family transportation

ruzzinator 2005 Pontiac Bonneville GXPReview:

Hey I Give It 10 Out Of 10 — 11/20/10 = Just found my 2005 Bonneville GXP, white tricoat with 18,000 miles. What a find. Have onl...

Primary Use: Commuting to work


2019 Buick LaCrosse
Avenir AWD
2005 Pontiac Bonneville
Powertrain 9-Speed Automatic 4-Speed Automatic
Fuel Economy, City
20 MPG
15 MPG
Fuel Economy, Highway
29 MPG
22 MPG
Fuel Tank Volume 16.2 gal 18 gal
Fuel Type
310 hp @ 6,800 RPM
275 hp @ 5,600 RPM
268 lb-ft @ 5,200 RPM
300 lb-ft @ 4,000 RPM
6 cylinders
8 cylinders
Compression Ratio
3,600 cc
4,600 cc
Bore x Stroke
3.74 in x 3.37 in
3.66 in x 3.31 in
ABS Brakes Standard Optional
Driver Airbag Standard Optional
Passenger Airbag Standard Optional
Front Side Airbags Standard Optional
Rear Side Airbags Standard --
Curtain Airbags Standard --
NHTSA Crash Test Results
Front Driver -- 4 stars
Front Passenger -- 5 stars
Side Driver -- 4 stars
Side Rear Passenger -- 4 stars
Rollover (pre-2011) -- 5 stars
Overall 5 stars --
Front Crash Overall 5 stars --
Front Crash Driver 5 stars --
Front Crash Passenger 4 stars --
Side Crash Overall 5 stars --
Side Barrier Driver 4 stars --
Side Barrier Passenger 5 stars --
Side Pole Driver 5 stars --
Rollover 5 stars --
Comfort and Convenience
Sunroof/Moonroof Standard Optional
Leather Seats -- Standard
Air Conditioning Standard Optional
CD Player -- Optional
CD Changer -- Optional
Cassette Player -- Optional
Radio Standard Optional
Power Windows Standard Optional
Power Door Locks Standard Optional
Driver Power Seats Standard Optional
Passenger Power Seats Standard Optional
Maximum Seating 5 seats 5 seats
Front Legroom 42 in 42.6 in
Back Legroom 38 in 38 in
Payload and Towing
Cargo Volume 15 cu ft 18 cu ft
Length 197.5 in 202.6 in
Width 73.5 in 74.2 in
Height 57.5 in 56.6 in
Wheelbase 114.4 in 112.2 in

Available Options

2019 Buick LaCrosse
Avenir AWD

Exterior Colors

  • Carrageen Metallic
  • Ebony Twilight Metallic
  • PEPPERDUST Metallic
  • Pewter Metallic
  • Satin Steel Metallic
  • White Frost Tricoat

Option Packages

  • Dynamic Drive Package
  • Driver Confidence Package II
2005 Pontiac Bonneville

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