 Class 73 is a four @-@ car electric multiple unit built by Adtranz . Each four @-@ car train has eight bogies — of which three are powered — with a total power output of 2 @,@ 646 kW ( 3 @,@ 548 hp ) . The trains have active tilting , which allows speeds 20 to 30 percent higher than conventional trains through curves on conventional lines . Maximum permitted speed is 210 km / h ( 130 mph ) . A four @-@ car train is 108 @.@ 48 meters ( 355 @.@ 9 ft ) long ; an A @-@ series weighs 215 @.@ 1 tonnes ( 211 @.@ 7 long tons ; 237 @.@ 1 short tons ) while a B @-@ series unit weighs 216 @.@ 1 tonnes ( 212 @.@ 7 long tons ; 238 @.@ 2 short tons ) . The trains have a steel body and the entire cabin is pressurized . Rail brakes are installed on all carrying bogies . 
