Volvo B18 engine

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B18/B20 fitted to VW Beetle for racing

This B18 was a straight-4 automobile engine produced by Volvo Cars from 1961 through 1968. It was a five-bearing rework of the Volvo B16 engine that preceded it, and it led to the B20. The cam-in-block engine had overhead valves operated by pushrods.

1 B18
2 B20
3 See also
4 References

[edit] B18

The B18 displaced 1.8 L (1778 cc/108 in³) and was used in the Volvo PV544, 120 (Amazon), P1800 and 140 series. While being quite different in design from its predecessor B16, B18 has many interchangeable parts with the later B20 engine.

There are actually four variations of this engine, B18A (the single carburetor version), B18B (dual carburetor version fitted variously with dual SU or Zenith/Stromberg sidedraft carburetors), B18C (the version fitted in the gasoline powered versions of the Volvo BM 320 tractor) and B18D (also dual carburetor but with a lower compression ratio).

[edit] B20

The B20 displaced 2.0 L (1986 cc/121 in³) and was produced in the 1960s and 70s. It was used from 1968 to 1976 in the Volvo 120, 1800, 140, C202 and 240 series, and also in the Volvo BM BV202 oversnow vehicle. The design is quite similar to the predecessor B18 and many parts are interchangeable.

The later B20E and B20F versions featured Bosch fuel injection (both electronic D-Jetronic and later with mechanical K-Jetronic), larger valves, and intake/exaust ports. Output was raised to 124 hp (DIN) (92 kW) in B20E, slightly lower in B20F because of stricter emission control and lower compression. All B20 engines displace 1986 cc from 88.9 mm bore and 80 mm stroke.

Some 240 models were offered with the "metric", eight bolt, 2.0 liter pushrod B20 motor as standard equipment.

Despite their pushrod design, the engines can rev to 7,000rpm.