via Wikipedia:
In 1992 at the Nardò Ring, Martin Brundle drove an XJ220 to 212.3 mph (341.7 km/h). Because the car's catalytic converters sapped the engine of an estimated 60 hp (45 kW), they were later disconnected and the rev limiter was increased from 7200 rpm to 7900 rpm in a quest to make the XJ220 go even faster. On a later run with the modifications, Brundle took the XJ220 to 217.1 mph (349.4 km/h) (the equivalent to approximately 223 mph (359 km/h) on a straight road).