increases In 1991 increased capacities for the 2.8 and 2.9 engines (3.5 and 3.7 litres, respectively), were first developed and introduced by D.P. Davies and sold by his company, VeeTech Engineering now RND Engineering in the UK. Two companies still produce large capacity conversions on the 2.8 & 2.9: Power Engineering and Specialised Engines. References Anderson, Doug. Rebuilding The Ford 4.0L Pushrod V6 , Engine Builder, April 2001. Cologne Goods manufactured in Germany V6 engines Gasoline engines by model