Dave Immel Automotive Consultant
282 E. Wolf Run, Mukwonago WI 53149
The 1951 Buick XP-300
Posted November 25, 2019
The Buick XP-300 was designed by General
Motors vice president of engineering Charles
Chayne along with Ned F. Nickles. Chayne had
previously worked with Harley Earl in designing the
1938-39 Buick Y-Job. In May 1951, Chayne
granted approval for construction of the XP-300
along with a counterpart GM concept car, the Le
Sabre which was designed by Harley Earl.
The XP-300 shares many common mechanical
components with the Le Sabre, including its 335-
horsepower supercharged V8 engine, which could
run on either gasoline or methanol. Following
GM's "long and low" design philosophy in the
1950s, the XP-300 measures over 16 feet in total
length but is only 39.1 inches in height.
The XP-300 was displayed at auto shows across
the United States, including the Chicago Auto
Show in February 1951 and GM's 1953 Motorama
tour. In 1966, the XP-300 was refurbished and
donated to the Alfred P. Sloan Museum in Flint,
Michigan, where it remains as of last year.
The Buick XP-300 is a concept car created by
General Motors in 1951.