Whether four or six-cylinder models, all 610s were equipped with Nissan's L-series inline engines. In many export markets, including UK, Europe, and Australia, the 610 was badged as the 160B or 180B with respect to particular engine displacement. The Bluebird name also often appeared in advertising and in brochures. In the UK the popularity of the 160B/180B/180B SSS Coupe range further strengthened Datsun's position as the leading Japanese importer. As a result of Japanese Government passage of emission control regulations, Nissan introduced their emissions technology in 1975, using a badge that said "Nissan NAPS" (Nissan Anti Pollution System) on vehicles thus equipped. Most 610s worldwide came equipped with either a four-speed manual or a three-speed automatic transmission, but a five-speed manual transmission was available in the Japanese and Australian markets.