The Prince G-series engine was the company's only straight-four and straight-six engines which began production in 1955. A number of variations were made, with both OHV and OHC heads. A diesel four-cylinder with 1.9 L (1,862 cc) was also built, called the D-6. The G series was used in the Skyline, the Laurel, and the Gloria from the 1950s to the early 1970s.

The Nissan Laurel is a two- and four-door sedan manufactured and marketed by Nissan from 1968 to 2002. Later generations added all-wheel-drive along with turbocharged engines. Introduced in 1968 as a new model positioned above the Datsun Bluebird 510, the Laurel offered the luxury of the Nissan Gloria A30 in a shorter wheelbase, and has always been the luxury version of the Skyline range for all generations, sharing engines, suspensions and handling dynamics of the popular performance coupe and sedan while having a longer wheelbase.