Buick does not build many cars like the Buick Standard Six with 191 cuin Buick Straight-6 engine OHV I6, made in small numbers.
Where it came from
The Buick Standard Six Series 20 was an automobile produced by Buick between 1925 and 1928. Powered by the overhead valve (OHV) Buick straight-6 engine, it was the junior model to the Buick Master Six, and shared the GM A platform with Oldsmobile, Oakland and Chevrolet. The Standard Six evolved from the earlier Buick Six when the Buick 4-cylinder was cancelled. The Standard Six was the most popular Buick sold while being more upscale to the Oldsmobile Six.
It was the senior brand to Marquette under the General Motors Companion Make Program until Marquette was cancelled one year later. It replaced the earlier Buick Six that was introduced in 1916, and was replaced with the Buick Series 50. Coachwork continued to be offered by Fisher Body, which was the primary supplier of all GM products at this time, and its Duco automotive lacquer paint, introduced by DuPont was the first quick drying multi-color line of nitrocellulose lacquers made especially for the automotive industry. The Series 20 was manufactured at what would later become known as the Buick City factory on Hamilton Ave. in Flint, Michigan.
Under the skin
Under the skin sits 191 cuin Buick Straight-6 engine OHV I6; other versions carried different engines, listed in the specification table below. The gearbox is a 3-speed synchromesh manual. The layout matters: a front engine drives the rear wheels, the classic proportion — long bonnet, cabin set back — that most people picture when they picture a sports saloon or a grand tourer. The wheelbase is 114.5 in. These are manufacturer figures carried by Wikipedia and Wikidata, not road-test measurements.
In context
Where it sits in Buick's history is not in doubt: the Buick Six came before it; the Buick Series 40 / Buick Series 50 followed it; it was built at Flint, Michigan (Buick City), United States. Nearby in the Buick catalogue sit the Buick First Call and the Buick Funeral Car.