Opel diesel straight-4 1.2 L Z 13 DT engines

Opel diesel straight-4 1.2 L Z 13 DT 68 HP at 4000 RPM, 170 N⋅m at 1750 RPM engine

It's an 1248 cc (1.1 UK qt.) internal combustion reciprocating Inline 4 engine. It has bore/stroke ratio of 69.6 mm × 82 mm (2.74 in × 3.23 in). This engine was rated 51 kW (68.39 hp) at 4000 rpm and 170 N⋅m (125.39 lbf⋅ft) of torque at 1750 rpm.