With further modifications, the V12 appeared in the Jaguar XJR-6 race car of 1985. It grew from 6.2 to 6.3 liters, before expanding again to 7.0 liters for the XJR-9, pictured above, which won six ...

Originally good for 301 horsepower and 336 LB-FT of torque, the 6.0 V12 was Jaguar’s last great engine before the brand wandered off into Ford-powered ambiguity. It made its name with a quiet ...

Under all that glitz and glimmer is a 5.6-liter supercharged V12 engine that was developed in-house by the TWR engineers, which produces around 650 horsepower and 538.4 lb-ft (730 Nm) of torque.

The shell (heavily based on the Series I E-Type) was mated with a customized Series II frame, and a Jaguar V12 (borrowed from the Series III variant) was installed under the hood.

They’re cheap—regularly under $10,000 in varying conditions, from what I’ve found—and are available with hulking V12 engines, so I always fantasize about their kickass project car potential.

In the end, Jaguar sold just 281 of the XJ220's planned 350-car run. Already absorbing a loss on the stock XJ220, Jaguar faced multiple obstacles to make the XJ220S road-legal in the United States.