Pontiac Bonneville Tri-Power Convertible

In 1954, Pontiac launched the Bonneville name on a pair of futuristic GM Motorama concept cars that were dubbed “Bonneville Special.” In 1957, the Pontiac Bonneville Convertible was introduced as a limited-production model based on the top-of-the-line Star Chief with Rochester fuel injection. Just 630 were produced, and with their Cadillac-level price, the Bonneville name emerged as Pontiac’s image leader.

For 1959, the Bonneville became a full top-of-the-line series of its own. That same year, Pontiac also introduced its famed “Wide Track” chassis layout, which created the best-handling full-size cars in the industry.

This car was auctioned off by RM Auctions in January of 2010 at the Arizona Biltmore Resort & Spa, Phoenix, Arizona and in June of 2010 at the Town and Country Resort & Convention Center, San Diego, California.

318 bhp, 389 cu. in. V8 engine, “Tri-Power” three two-barrel carburetors, four-speed manual transmission, independent front suspension with unequal-length A-arms, coil springs and stabilizer bar, live rear axle with control arms and coil springs, and four-wheel hydraulic drum brakes. Wheelbase: 124".

Source: RM Auctions
Photo Credit: Copyright Darin Schnabel

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