The Nissan Leopard is a line of sport/luxury cars built by Japanese carmaker Nissan from 1980 to 2000. The Leopard were initially based on the Japanese market Nissan Skyline and Nissan Laurel, then later based on the chassis of their Nissan Cedric and Nissan Gloria contemporaries and were rear wheel drive. Final versions were the contributing factors to Nissan's Infiniti M and J products.

The Leopard coupe and sedan were sold exclusively in Japan at Nissan Store locations as a companion to the Fairlady Z, allowing Nissan to sell a badge engineered version of the Skyline and Laurel. The Leopard was cancelled as a result of the Nissan Revival Plan, a casualty of overproduction. It was succeeded by the Nissan Fuga.

The first Leopard (also known as Leopard TR-X) was introduced in September 1980 as a contender in the upper medium class of cars. The Leopard was positioned as a larger coupe and sedan above the top level Nissan Bluebird 810 with the six-cylinder engine. The Leopard coupe was introduced after the Toyota Chaser but before the Toyota Soarer. The angular body, available as a two-door hardtop coupé "personal luxury car", and a four-door hardtop sedan, which featured very slim C- and D-pillars and large glass surfaces. The coupé featured a "glass-to-glass" rear window sharing the very slim C- and D-pillars from the sedan. The angular appearance was shared with the Fairlady Z, and the coupé was exclusive to Nissan Store Japanese Nissan dealerships while the sedan was exclusive to Nissan Cherry Store. The coupé replaced the Nissan Cedric coupé and the Nissan Laurel coupé. The wind resistance drag coefficient of the two-door version is 0.37. At the time of introduction, the two body styles both carried the same price tags. The Leopard featured some industry firsts, for instance a fuel consumption gauge in the dashboard.

Originally the Leopard was available with naturally aspirated inline four- and six-cylinder engines of 1,800, 2,000, and 2,800 cc displacement; the largest engine received an electronic engine management system developed together with Hitachi, and was called NAPS-Z. The 1.8 liter fours were also originally available with a four-speed manual transmission, all others received five-speeds as standard (or an optional three-speed automatic). In July 1981 a two-liter turbocharged engine was added. Available as a GX, SGX, and ZGX, it had the same maximum output 145 PS (143 hp; 107 kW) as did the more expensive and heavier 2.8.

In September 1982, the Leopard received a mild facelift and with it, the under-performing 2.8 was dropped from the lineup. In June 1984 a limited Turbo Grand Edition with the 300ZX's 230 PS (227 hp; 169 kW) 3 litre VG30ET turbo V6 engine joined the line-up.

The car shared many components with the six-cylinder version of the Nissan Bluebird (910), sold in North America as the Datsun 810 (and later renamed the Nissan Maxima), but used a platform based on the Nissan Skyline R30. The Japanese version had side view mirrors mounted on the front fenders and (uniquely) had small wipers attached to the top of the mirrors to remove accumulated rain and dirt from the surface of the mirrors.

A list of the various trim levels and engines that the Leopard was available with at its introduction. The 2-liter engine gave Japanese buyers the option of paying less annual road tax:

After a mild styling update in late 1982, the car was offered in the following variations:
180X GX, SGX
200X SGX, ZGX
200 Turbo SGX, ZGX, ZGX Super Edition
300 Turbo Grand Edition