Volvo introduced its first straight-6 engine in 1929. It was a side valve engine with a cast iron block and seven main bearings. These engines powered all six cylinder Volvo passenger cars and taxi cabs between 1929 and 1958.
Versions:
| Version | Year | Bore x stroke | Displacement | Power | Application | Notes |
|---|---|---|---|---|---|---|
| DB | 1929-32 | 76.2x110 mm | 3,010 cc (184 cu in) | 55 hp (41 kW; 56 PS) | PV651-652, TR671-674 | |
| EB | 1932-35 | 79.4x110 mm | 3,366 cc (205.4 cu in) | 65 hp (48 kW; 66 PS) | PV652-654, TR673-679 | |
| EC | 1935-45 | 84.14x110 mm | 3,670 cc (224 cu in) | 86 hp (64 kW; 87 PS) | PV658-659, PV36, PV51-56, TR701-704, PV801-802 | |
| ECG | 1940-45 | 84.14x110 mm | 3,670 cc (224 cu in) | 50 hp (37 kW; 51 PS) | PV51-56, PV801-802 | War time wood gas conversion |
| ED | 1946-58 | 84.14x110 mm | 3,670 cc (224 cu in) | 90 hp (67 kW; 91 PS) | PV60, PV821-834 |