 TWR purchased the rights to the V64V engine from Austin Rover in 1989 and developed a completely new turbocharged engine , codenamed JV6 , under the auspices of Allan Scott , with proportions roughly similar to the V64V , and suitable for Sportcar racing . TWR redesigned all parts of the engine , increasing the displacement to 3 @.@ 5 litres , and adding two Garrett TO3 turbochargers . The JV6 engine would first be used in the JaguarSport XJR @-@ 10 and XJR @-@ 11 racing cars ; its compact dimensions and low weight made it an ideal candidate for the XJ220 . The engine had a 90 ° bank angle , four valves per cylinder and belt @-@ driven double overhead camshafts . It shares a number of design features with the Cosworth DFV Formula One engine . 
