The Datsun B210 continued to be the fuel-economy leader in North America and it was one of the least expensive cars available. This was in part due to the light metal; small A13 or A14 engine with OHV technology and a very basic vinyl interior used in its construction. Introduced for 1974 with a 1.3-litre four, this was replaced by a larger and more powerful 1.4-litre version for 1975. This engine remained in use, continuing to be installed in the next generation B210. At the time, their body styles were popular with buyers – mainly the hatchback coupé as the sedans were considered by some to be less appealing. Datsun dealers were instructed to describe the coupé as having "the image of a Mini-Z-Car". The 1978 B210 (American model) with five-speed transmission was rated by the United States Environmental Protection Agency at highway fuel economy.