1966 Prince R380A-I Japan Grand Prix Winner

The Prince R380A-I turned a difficult encounter with Porsche into a purpose-built sports prototype. Nissan's Heritage Collection identifies the preserved No.11 as Yoshikazu Sunako's overall winner at the 1966 Japan Grand Prix. Its mid-mounted GR8 engine and lightweight body place it in a different category from the Skyline that inspired the challenge. This archive profile follows that documented winning vehicle and design, with restoration history kept visible and no speculative production count.

A prototype rather than another modified saloon

Prince developed the R380 after the 1964 Japan Grand Prix demonstrated the challenge posed by Porsche's sports-racing machinery. Nissan credits Shinichiro Sakurai as chief engineer. The resulting car used an aluminium body and a chassis arrangement related to the Brabham BT8, with the engine mounted behind the cockpit. This was a change in approach: instead of asking a passenger-car shell to do more, Prince built around the requirements of prototype competition.

Nissan Heritage: Prince R380A-I

The GR8 engine at the centre of the design

Nissan describes the GR8 as a newly developed four-valve DOHC straight-six derived from the G7's lineage. The collection specification lists 1,996 cc and more than 200 PS, with a curb-weight reference of 620 kg. Those are historical racing specifications. They explain the project's ambition without needing a modern acceleration estimate. The engine's architecture also helps illuminate the later S20 story, while remaining a separate competition engine with its own preparation and operating demands.

The 1966 Fuji victory

The collection identifies this as the actual No.11 driven by Sunako to victory at the third Japan Grand Prix at Fuji Speedway. That is a stronger vehicle-level claim than a general statement that an R380 once won. The result also came before Prince merged with Nissan in 1966. Retaining the Prince name in the title respects the car's contemporary identity, while its place in Nissan's archive records the subsequent corporate and engineering continuity.

Nissan Heritage: Prince R380A-I

Restoration is part of its provenance

NISMO fully restored the car in 2013, according to Nissan, and it was later repainted red to match its 1966 appearance in 2018. Consequently, photographs made at different times may show different presentation states without depicting separate editions. Colour alone cannot settle a chassis question. A good archive record keeps dates, restoration documentation and exhibition captions together so that a later appearance does not silently replace the vehicle's earlier competition history.

Nissan Heritage: Prince R380A-I

Reading the R380 family

The A-I winner should be compared with the A-II record car as related developments, not merged with it. The later body and engine specification reflect a new phase of work. Nor should the number of restored museum examples be treated as a reliable total of original chassis built. The useful distinction is between a verified event identity, an engineering generation and a production census. This profile has strong evidence for the first two and leaves the third unassigned.

Specifications and identity reference

Rarity and production scope

One documented winning competition vehicle within the R380A-I programme. No worldwide chassis-build count is assigned, and the later R380A-II is a separate development. Competition machinery belongs in Archive and is excluded from customer road-production totals.

This is an Archive record. Concepts, restored heritage vehicles, works cars and competition programmes are not added to customer road-production totals. A programme profile does not establish how many physical chassis were made, and repeated exhibition appearances do not create additional vehicles.

What the photograph represents

Preserved Prince R380A-I photographed in its displayed restoration state; the image is not a period 1966 photograph.

Related Nissan heritage profiles

• 1967 Nissan R380A-II International Record Car
• 1969 Nissan Skyline 2000GT-R Sedan

Frequently asked questions

Is this a road-car homologation edition?

No. The R380A-I is a purpose-built competition prototype.

Why do photographs show different colours?

Nissan documents restoration in 2013 and repainting to the 1966 red appearance in 2018; image dates matter.

What is the production-count boundary for this profile?

One documented winning competition vehicle within the R380A-I programme. No worldwide chassis-build count is assigned, and the later R380A-II is a separate development. Competition machinery belongs in Archive and is excluded from customer road-production totals.

Sources and further reading

1. Nissan Heritage: Prince R380A-I

Research checked 16 October 2026. Manufacturer records support identity and the specifically attributed historical figures. Photographic descriptions identify the illustrated subject. Design analysis and suggested authentication steps are editorial interpretation.