 The V64V engine chosen had a short but successful career as a purpose @-@ designed racing car engine . It was designed by Cosworth engine designer David Wood for Austin Rover Group 's Metro derived Group B rally car , the MG Metro 6R4 . The redesign work necessary to create the Jaguar / TWR JV6 engine was undertaken by Andrew Barnes , TWR 's Powertrain Manager , and also involved Swiss engine builder Max Heidegger who had designed and built the race engines used in the XJR @-@ 10 and XJR @-@ 11 racing cars . 
