From Toyota Wiki

The Toyota C engine family was a series of Inline-4 Diesel engine.

Code	Capacity (cc)	Bore (mm)	Stroke (mm)	Power (kW)	Torque (Nm)
1C	1839	83.0	85.0	49
2C	1974	86.0	85.0	54
2C-T	1974	86.0	85.0	65
3C				58
3C-TE				69

1C

2C

The 2C was a long running diesel engine, with some models (e.g. Toyota Corona) receiving the turbo version 2C-T which provided 65 kW. It was replaced by the more economical 3C-TE in the above model from 1999.

3C

Although having a larger displacement than the 2C-T, the 3C-TE was more economical and powerful at 69 kW. The C series engines were replaced by the Toyota CD Engine series in the European market, while Toyota stopped selling diesel models in Japan after the 3C-TE.