Cosworth increased its work with Ford in 1969. Cosworth developed a double overhead camshaft (DOHC) 16-valve inline four cylinder engine for road use in the European Ford Escort. Working from the Kent block, Cosworth created a 1.6 Litre engine for homologation (standarding) purposes. The camshafts were driven by a toothed timing belt. The name BDA, came from "Belt Drive, A type". Running in Group 2 and Group 4 on either rallying or touring car racing, this engine could be enlarged to 2.0 litres. The standard 1.6 L engine could be used in cars competing overall wins, not just first in class.