The Continental R-670 (factory designation W670) was a seven-cylinder four-stroke radial aircraft engine produced by Continental displacing 668 cubic inches (11 litres) and a dry weight of 465 lb (211 kg).

The engine was the successor to Continental's first radial engine, the 170 hp Continental A-70.

The R-670 was widely used in the PT-17 Stearman primary training aircraft of the U.S.

[1] In addition to being used in aircraft, the R-670 was used in a number of light armored vehicles of World War II.

Data from: Jane's All the World's Aircraft 1938[2] Variants of the W670 included: Data from Jane's 1938[2] Comparable engines Related lists