(gross) @ 3200 rpm maximum torque (gross) @ 1600 rpm R (H16) The R engine used essentially the same block as the H20, but a shorter piston stroke resulted in a capacity reduction of . The R was later named H16. The "R" motor made the switch from 3 to 5 main bearings in 1967 for improved reliability, and the H20 was developed from this arrangement. The R/H16 bore and stroke is displacing . With 9.0:1 compression, the engine produced and . Applications: 1965-1967 Nissan Bluebird R411 SSS 1965-1968 Nissan Silvia CSP311 1967-1970 Datsun Sports SP311/SPL311 1968-1972 Nissan Homer T641 U20 The U20 was similar to the H20 but with an SOHC cylinder head for motorsports applications. Although Prince Motor Company is credited in many sources with designing the U20, it was actually designed in-house at Nissan by Kenichi Sasaki. The U20 was produced in two forms: a stock version with twin SU carburetors, or a version with twin Mikuni/Solex carburetors and a "B" model camshaft. Applications: 1967.5-1970 Datsun Sports SR311 Straight-6 K The K engine is a straight-6 engine produced from 1963 to 1965. The K engine is an H engine with two extra cylinders. The K engine produced . Applications: 1963-1965 Nissan Cedric Special 50 H30 The H30 is a straight-6 version produced from 1965. Output ranged from and torque is . The H30 is an H20 with two extra cylinders. Applications: 1965-1973 Nissan President 150 1973-1975 Nissan President 250 1966-1976 Nissan C80 This engine is used in large forklifts See also List of Nissan engines Nissan G engine References H Straight-four engines Straight-six engines Gasoline engines by model