The C family was Mazda's first large piston engine design.
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The 985 cc (1.0 L; 60.1 cu in) PC engine featured a 70 mm (2.8 in) bore and 64 mm (2.5 in) stroke. It was an eight-valve SOHC design and was designed for rear wheel drive longitudinal applications. The PC produced 45 hp (34 kW) and 51 lb·ft (69 N·m) in the export market 323.
Applications:
The 1,272 cc (1.3 L; 77.6 cu in) TC had a 73 mm (3 in) bore and 76 mm (3 in) stroke; a bored and stroked version of the PC. Used in the 1970, 1973, and 1977 Mazda Familia, and the 1979 - 1984 Mazda Bongo's / Ford Econovans as the smaller engine option, the larger being the 1.6 L Mazda NA engine.
Applications:
1,415 cc (1.4 L; 86.3 cu in) (77.0x76.0 mm) - A larger-bored version of the TC, used in the 1978-1980 Mazda GLC. Produced 70 hp (52 kW). Was also used in the 79-84 E1400/Econovan and a short run in the new 1984 Ford Econovan as the base model engine until 1985, presumably to use up surplus engines, the other options being the 1.8 L F8 or 2.0 L FE petrol engines or the 2.2 L R2 diesel engine. In some parts documentations, it is referred to as the D4, however no UC engine block was ever stamped D4.
The original 1966 Luce 1500 used a 1,490 cc (1.5 L; 90.9 cu in) SOHC I4 with square 78 mm (3 in) bore and stroke. This engine, also used in the Grand Familia for a short while, was replaced by the stroked NA engine (below).
Applications:
The 1,586 cc (1.6 L; 96.8 cu in) SOHC NA engine was a UB, stroked (to 83.0 mm, 3.3 in). JDM output was 100 hp (75 kW) at 6,000 rpm, with maximum torque of 14.0 kg·m (137 N·m) at 3,500 rpm. US-spec was 70 hp (52 kW) at 5,000 rpm, with maximum torque of 82 lb·ft (111 N·m) at 3,500 rpm with a single Nikkei carburetor. The rest of the world received a 75 hp (56 kW) version. Later on, this engine was also referred to as H6.
Applications:
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).[2]
An all new engine was used in the 1977 Mazda Luce and 1975 Cosmo/121. Designated VC it featured an alloy SOHC 8-valve head on an iron block, with a 80.0 x 88 mm bore and stroke for a total of 1,769 cc (1.8 L; 108.0 cu in). Engine output was 83 hp (62 kW) and 99 lb·ft (134 N·m).