Opel gasoline straight-3 973 cc Z 10 XE engines

Opel gasoline straight-3 973 cc Z 10 XE 58 HP at 5600 RPM, 85 N⋅m at 3800 RPM engine

It's an 973 cc (1.71 UK pt.) internal combustion reciprocating Inline 3 engine. It has bore/stroke ratio of 72.5 mm × 78.6 mm (2.85 in × 3.09 in). This engine was rated 43 kW (57.66 hp) at 5600 rpm and 85 N⋅m (62.69 lbf⋅ft) of torque at 3800 rpm.