Simplify the following text for a Grade 9 native English-speaking person.
Original: They would have been capable of traveling at up to 250 k , and powering a push-pull train of up to nine Mark 5 coaches and a driving van trailer ( DVT ) , similar to the InterCity 225 sets .
Simplified: The locomotive would have been utilised along with a train of up to nine Mark 5 coaches and a DVT , similar to the InterCity 225 sets .