OVER THE HILL
from Lansing to New York to deliver a Hill generator unit. While the trip was successful, economical, and uneventful, it did not lead to widespread use of Hill diesels in motor vehicles. The Model C did lead to the Type R diesel, which debuted in 1940, and this engine would be the last type built by Hill.
The Type R was similar to the Type C but destroked to 5.5 inches, and featured individual camshaft-driven Bosch APF injection pumps for each cylinder rather than an inline Hill pump. It was offered in two- (Model 2R), four- (4R), and six-cylinder (6R) configurations. The older designs were gradually discontinued as Model R production was ramped up, and the 1942 Hill catalogs do not show the older engines at all.
The Model Rs were offered as power generators or marine propulsion units. The two-cylinder displaced 106 cubic inches and made a maximum of 23 horsepower at 1,800 rpm, with the continuous rating a more modest 17.5 hp at 1,600. The 4R displaced 212 cubes, made 51.5 hp at 1,800 max (34 @ 1,600 continuous). The 6R was 318 cubic inches and made 78 hp at