The front of the vehicle shares some visual appearances with the 1967–1968 Mercury Marquis. The four-cylinder is the H20-series OHV engine, with the 6-cylinder L20 engine using twin carburetors sourced from manufacturer SU carburetor. The H20P uses LPG for fuel, and the SD20 OHV is a diesel engine. The SD20 was the first time a diesel engine was offered in a Gloria. October 1971 saw the 2.6-litre L26 six-cylinder engine added to the options list. In August 1972, both a two-door hardtop coupé "personal luxury car" and a four-door hardtop was added, to compete with the Toyota Crown coupé. Fifth generation 330 This generation of the Gloria has been completely shared with the Cedric, essentially being the same vehicle, aside from changes in appearance. Halogen headlights are introduced to the Gloria, along with both a 2-door and 4-door hardtop body style, in addition to a 4-door sedan. The twin carburetors were removed from the small L20 six-cylinder, due to emission regulations. The 2.6 L engine is replaced with the larger 2.8 L version of the same. The overhead valve H20 four-cylinder engine remained in use for the 4-door sedan for taxi usage, usually running on LPG fuel. October 1975 saw the introduction of the 2000GL-E and the 2000SGL-E, with the "E" designation signifying fuel injection, which was included in the Nissan NAPS emission control technology package.. June 1976 saw cosmetic changes, with halogen headlights being used on all versions except the sedan used for taxi service. Wheel covers are now painted to match the exterior body color. June 1977 saw the introduction of the 2800 E Brougham at the top of the options list. The SD22 2.2 L diesel on the basic sedan and wagon, which was a first for the Gloria. Column shift is replaced with a floor-mounted system on the 4-door hardtop. November 1978 saw another emissions adjustment. Items found on the 2800 Brougham were introduced on the 2000 SGL-E sedan and hardtop. Radial tires are introduced. Sixth generation 430 June 1979 saw a completely redesigned Nissan Gloria with assistance with Pininfarina, with a more simple and straightforward appearance over the previous generation, and exchanging the single unit halogen headlights with 4 sealed beam headlight units. Computer-controlled fuel injection was added to more engines offered, with the "E" designation signifying fuel injection. The 2-door hardtop coupe was discontinued and replaced with the luxury sports coupe Nissan Leopard. Trim