 The name XJ220 was chosen as a continuation of the naming of the Jaguar XK120 , which referred to the top speed of the model in miles per hour . The concept car had a targeted top speed of 220 mph ( 350 km / h ) so became the XJ220 . The XK120 , like the XJ220 , was an aluminium @-@ bodied sports car , and when launched was the fastest production car in the world . 
