Opel diesel straight-6 2.5 L Y 25 DT engines

Opel diesel straight-6 2.5 L Y 25 DT 148 HP at 4000 RPM, 300 N⋅m at 1750 RPM engine

It's an 2497 cc (2.2 UK qt.) internal combustion reciprocating Inline 6 engine. It has bore/stroke ratio of 80 mm × 82.8 mm (3.15 in × 3.26 in). This engine was rated 110 kW (147.51 hp) at 4000 rpm and 300 N⋅m (221.27 lbf⋅ft) of torque at 1750 rpm.