original: The British Rail Class 91 is a class of 140 mph (225 km / h), 4.54MW / 6,300 hp electric locomotives ordered as a component of the East Coast Main Line modernisation and electrification programme of the late 1980s.
simplifications: The British Rail 91 is a class of 140 mph, 4.54MW / 6,300 hp electric train ordered as for the East Coast Main Line in late 1980s. The British Rail Class 91 is a class of 140 mph, 6,300 hp electric locomotives of the East Coast Main Line modernization and electrification program in the 1980's. he British Rail Class 91 is a class of 140 mph (225 km /h), 4.54 MW / 6,300 hp electric locomotives. They were ordered as part of the East Coast Main Line modernization and electrification program in the 1980s. The British Rail Class 91 is a class of 140 mph (225 km / h), 4.54MW / 6,300 hp electric locomotives. They were ordered as part of the East Coast Main Line modernisation and electrification programme of the late 1980s. British Rail Class 91 is a locomtive that can travel up to 140 miles per hour, with 6,300 horsepower. It was bought as part of the East Coast Main Line imporvement programs on the late 1980's. he British Rail Class 91 is a class of 140 mph, 6,300 hp electric locomotives ordered as a component of the East Coast Main Line modernisation and electrification programme of the late 1980s. The British Rail Class 91 is a class of electric train that was first introduced in the late 1980s. The East Coast Main Line program started in the 1980's to modernize and electrify their railways uses the British Rail Class 91 a 6,300 hp locomotive. The British Rail Class 91 is a class of 140 mph, 6,300 hp, electric locomotives. They were ordered as a part of the East Coast Main Line modernization and electrification program of the late 1980s. The British Rail Class 91 is a class of 140 mph, 6,300 hp railway engines . These engines are  ordered as a part of the East Coast Main Line modernisation and electrification programme of the late 1980s.