VB
A stroked (to 94.0 mm) 1.8 L (1,796 cc) version of the UB/NA, retaining the 78.0 mm bore, was used in the 1968-1972 Luce 1800 and the 1975-1979 Mazda B1800/Proceed. Output for the 1972 Luce was 100 PS (74 kW) JIS at 5,500 rpm and 15.5 kg·m (152 N·m; 112 lb·ft) at 3,000 rpm. Export model outputs varied, with European market models claiming 104 hp DIN (all other figures remaining the same).
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