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Renault Billancourt engine

The Billancourt engine was an automotive engine designed by Renault for the Renault 4CV, used subsequently until 1985. It later received the internal code "B", for Billancourt. The "sport" version is called Ventoux engine. Wikipedia
Compression ratio: 9.2:1
Cylinder block material: Cast-iron
Cylinder bore: 49 mm (1.93 in); 54.5 mm (2.15 in); 55 mm (2.17 in); 55.8 mm (2.20 in); 58 mm (2.28 in)
Cylinder head material: Aluminium
Piston stroke: 80 mm (3.15 in)
Torque output: 42–62.8 N⋅m (31.0–46.3 lbf⋅ft)