The B18 is a 1.8 L inline four cylinder automobile engine produced by Volvo from 1961 through 1968. A larger 2.0 L derivative called the B20 debuted in 1969.

The Volvo P1800 is a 2+2, front-engine, rear-drive sports car manufactured and marketed by Volvo Cars between 1961 and 1973. Originally a coupé (1961–1972), it was also offered in a shooting brake configuration toward the end of its production (1972–1973). Styling was by Pelle Petterson under the tutelage of Pietro Frua when Frua's studio was a subsidiary of the Italian carrozzeria Ghia, and the mechanicals were derived from Volvo's Amazon/122 series.