Opel used the straight-6 engine configuration for many years. Opel used two straight-6 engines prior to the better-known CIH engine family.
| Opel Straight-6 | |
|---|---|
| Overview | |
| Manufacturer | Opel |
| Also called | Vauxhall Straight-6 |
| Production | 1930-1966 |
| Layout | |
| Configuration | Naturally aspirated Straight-6 |
| Displacement | 1.8 L (1,790 cc) 2.6 L (2,605 cc) |
| Cylinder bore | 65 mm (2.56 in) 85 mm (3.35 in) |
| Piston stroke | 90 mm (3.54 in) 76.5 mm (3.01 in) |
| Valvetrain | OHV 2 valves x cyl. |
| Compression ratio | 7.8:1 |
| Combustion | |
| Fuel system | Carburetor |
| Fuel type | Petrol |
| Cooling system | Water-cooled |
| Output | |
| Power output | 33.5–91 PS (33.0–89.8 hp; 24.6–66.9 kW) |
| Torque output | 100–186 N⋅m (74–137 lb⋅ft) |
| Chronology | |
| Successor | Opel CIH engine |
Moonlight
editThe Opel Moonlight roadster was the first Opel vehicle with a straight-6. It used a 1.8 L (1,790 cc) six in 1933. It was a 12-valve engine with a very-undersquare 65 mm × 90 mm (2.56 in × 3.54 in) bore and stroke, typical for the time. This engine produced 33.5 PS (33.0 hp; 24.6 kW) and 100 N⋅m (74 lb⋅ft).
Kapitän
editThe 1959 Opel Kapitän was the next vehicle from the company with a straight-6 engine. This was a 2.6 L (2,605 cc) unit with 12 overhead valves. Bore and stroke were now oversquare for high power output at 85 mm × 76.5 mm (3.35 in × 3.01 in). A single Opel-designed carburetor and 7.8:1 compression yielded 91 PS (90 hp; 67 kW) and 186 N⋅m (137 lb⋅ft).