 Engineering requirements resulted in significant changes to the specification of the XJ220 , most notably replacement of the Jaguar V12 engine by a turbocharged V6 engine . The changes to the specification and a collapse in the price of collectible cars brought about by the early 1990s recession resulted in many buyers choosing not to exercise their purchase options . A total of just 271 cars were produced by the time production ended , each with a retail price of £ 470 @,@ 000 in 1992 . 
