The Datsun 1500 Roadster SP310, also known as the Fairlady in certain markets, made its debut at the Tokyo Motor show in 1961, several months before the roll-out of the MGB. The SP 310 was powered by a 1.5-liter inline four-cylinder OHV engine with a single carburetor producing 77 hp . The 1500 was a 3-seat convertible with front buckets, and a transverse back seat. The 1964 production added a second SU carburetor and power increased to 85 horsepower . The final revision of the 1500 model occurred in 1965 with a completely redesigned interior. This eliminated the back seat and introduced a... more sporty dash layout. In 1966 engine displacement was boosted to 1.6 liters and power output to 96 hp . This new model was given the new designation SP 311. The 1600 Roadster was produced until the end of production in April 1970. The 2000 Roadster SR 311 was introduced as a half-year model in 1967. Powered by the U-20 single overhead cam engine, in stock configuration of twin SU carburetors it produced 135 hp . An optional version with twin Mikuni Solex carburetors produced 150 hp .
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