 TWR developed a further six XJ220 @-@ S road cars , featuring one @-@ piece carbon @-@ fiber @-@ reinforced polymer front and rear bodywork ; the engine was tuned to 700 PS ( 510 kW ; 690 hp ) . The XJ220 @-@ S models did away with the hidden headlamps of the original and instead opted for perspex covered lights . The S models were essentially road @-@ going versions of the XJ220 @-@ C racer , and as a result featured a much simpler race @-@ orientated interior with kevlar seats and the removal of the leather trim . Colin Goodwin , a writer for Autocar , tested an XJ220 @-@ S in June 1995 at Millbrook Proving Ground and set the lap record at an average speed of 180 @.@ 4 mph ( 290 @.@ 3 km / h ) . 
